51
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You W, Cui W, Yu W. Decoupling hydrodynamic and entanglement effects on the modulus reinforcement of grafted silica filled nanocomposites through Thermal and rheological features. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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52
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Lecoutre G, Lemarchand CA, Soulard L, Pineau N. Hugoniostat and Direct Shock Simulations in cis‐1,4‐Polybutadiene Melts. MACROMOL THEOR SIMUL 2020. [DOI: 10.1002/mats.202000068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Claire A. Lemarchand
- CEA, DAM, DIF Arpajon Cedex 91297 France
- Université Paris Saclay, CEA Laboratoire Matière en Conditions Extrêmes Bruyères‐le‐Châtel 91680 France
| | - Laurent Soulard
- CEA, DAM, DIF Arpajon Cedex 91297 France
- Université Paris Saclay, CEA Laboratoire Matière en Conditions Extrêmes Bruyères‐le‐Châtel 91680 France
| | - Nicolas Pineau
- CEA, DAM, DIF Arpajon Cedex 91297 France
- Université Paris Saclay, CEA Laboratoire Matière en Conditions Extrêmes Bruyères‐le‐Châtel 91680 France
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53
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Jung H, Gang SE, Kim JM, Heo TY, Lee S, Shin E, Kim BS, Choi SH. Regulating Dynamics of Polyether-Based Triblock Copolymer Hydrogels by End-Block Hydrophobicity. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01939] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hyunjoon Jung
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Seong-Eun Gang
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Jung-Min Kim
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Tae-Young Heo
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Sangho Lee
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Eeseul Shin
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Byeong-Su Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Soo-Hyung Choi
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
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54
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Modeling the Adhesion Bonding Strength in Injection Overmolding of Polypropylene Parts. Polymers (Basel) 2020; 12:polym12092063. [PMID: 32927874 PMCID: PMC7570169 DOI: 10.3390/polym12092063] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/04/2020] [Accepted: 09/08/2020] [Indexed: 11/17/2022] Open
Abstract
In this work, the bonding strength of overmolded polypropylene is investigated and modeled. A T-joint specimen was designed to replicate the bonding between a base and an overmolded stem made of the same polymer: a previously molded plaque was used for the base, and the stem was directly overmolded. The effect of melt temperature, holding pressure, and localized heating was investigated following the design of experiments approach. Both the melt and base temperature positively affect the welding strength. On the contrary, the holding pressure negatively contributed, as the crystallization temperature significantly increases with pressure. Then, the bonding strength of the specimens was predicted using a non-isothermal healing model. Moreover, the quadratic distance of diffusion (based on the self-diffusion model) was calculated and correlated with the bonding strength prediction. The non-isothermal healing model well predicts the bonding strength when the reptation time is calculated within the first 0.09 s of the interface temperature evolution. The prediction error ranges from 1% to 35% for the specimens overmolded at high and low melt and base temperatures, respectively.
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55
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He X, Kong M, Niu Y, Li G. Entanglement and Relaxation of Poly(methyl methacrylate) Chains in Imidazolium-Based Ionic Liquids with Different Cationic Structures. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00805] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Xi He
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China
| | - Miqiu Kong
- School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China
| | - Yanhua Niu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China
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56
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Opposite effect of salt on branched wormlike surfactant micelles with and without embedded polymer. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113301] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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57
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Brem A, Lhost O, Tervoort TA. Influence of Solvent Quality and Crystallization Conditions on the Drawability of Ultra-High Molecular Weight Polyethylene Cast from Solution. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00756] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- André Brem
- Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Olivier Lhost
- Total Research & Technology Feluy, Zone Industrielle C, B-7181 Seneffe, Belgium
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58
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Zhang X, Wei W, Jin X, Xiong H. Chain Dimension and Dynamics of Polymers in Well-Defined Non-sticky Nanocomposites of Molecular Nanoparticle Polyhedral Oligomeric Silsesquioxane/Poly(butylene oxide). Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00158] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinlin Zhang
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Wei Wei
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xin Jin
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Huiming Xiong
- Department of Polymer Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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59
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Erice A, Ruiz de Luzuriaga A, Azcune I, Fernandez M, Calafel I, Grande HJ, Rekondo A. New injectable and self-healable thermoset polythiourethane based on S-aromatic thiourethane dissociative exchange mechanism. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122461] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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60
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Hopmann C, Twardowski B, Bakir C. Limitations of Reptation Theory for Modeling the Stress‐Dependent Rheological Behavior of Polyethylene Terephthalate Above the Glass‐Transition Temperature. POLYM ENG SCI 2020. [DOI: 10.1002/pen.25334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christian Hopmann
- Institute for Plastics Processing (IKV) at RWTH Aachen University Aachen Germany
| | - Benjamin Twardowski
- Institute for Plastics Processing (IKV) at RWTH Aachen University Aachen Germany
| | - Can Bakir
- Institute for Plastics Processing (IKV) at RWTH Aachen University Aachen Germany
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61
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Liu M, Wang Y, Chen J, Luo J, Fu Q, Zhang J. The retarded recovery of disentangled state by blending HDPE with ultra-high molecular weight polyethylene. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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62
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Decroix C, Chalamet Y, Sudre G, Caroll V. Thermo-mechanical properties and blend behaviour of cellulose acetate/lactates and acid systems: Natural-based plasticizers. Carbohydr Polym 2020; 237:116072. [PMID: 32241410 DOI: 10.1016/j.carbpol.2020.116072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 02/20/2020] [Accepted: 02/25/2020] [Indexed: 10/24/2022]
Abstract
This work brings together thermo-mechanical and structural information for plasticized cellulose acetate (CA) by lactates and octanoic acid. CA are processed with plasticizer due to their high Tg and their strong H-bonding network. We prepared CA / plasticizer blends by corotative twin screw extruder and by solvent casting methods. The study of the different relaxations and of the glassy zone modulus was performed by dynamic mechanical analysis (DMA). The miscibility range of cellulose acetate blends were identified by the analysis of the tan δ. Depending on the composition of the system, one or two transitions are noted, this last result indicates the presence of a phase rich in CA and another in plasticizer. To connect this information to crystallinity and molecular organization, X-ray diffraction analyses were carried out. The disappearance of crystallinity allows the plasticization of previously inaccessible zones, causing a glassy modulus drop of more than 1000 MPa.
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Affiliation(s)
- Camille Decroix
- Univ Lyon, UJM-Saint-Etienne, CNRS, IMP, UMR 5223, F-42023, Saint-Etienne, France; Solvay in Axel'One, 87 avenue des Frères Perret CS 70061, F-69192, Saint-Fons, France.
| | - Yvan Chalamet
- Univ Lyon, UJM-Saint-Etienne, CNRS, IMP, UMR 5223, F-42023, Saint-Etienne, France.
| | - Guillaume Sudre
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IMP, UMR 5223, F-69100, Villeurbanne, France.
| | - Vergelati Caroll
- Solvay in Axel'One, 87 avenue des Frères Perret CS 70061, F-69192, Saint-Fons, France.
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63
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Mauri M, Hofmann AI, Gómez‐Heincke D, Kumara S, Amir Masoud Pourrahimi, Ouyang Y, Hagstrand P, Gkourmpis T, Xu X, Prieto O, Müller C. Click chemistry‐type crosslinking of a low‐conductivity polyethylene copolymer ternary blend for power cable insulation. POLYM INT 2020. [DOI: 10.1002/pi.5966] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Massimiliano Mauri
- Department of Chemistry and Chemical EngineeringChalmers University of Technology Göteborg Sweden
| | - Anna I Hofmann
- Department of Chemistry and Chemical EngineeringChalmers University of Technology Göteborg Sweden
| | | | - Sarath Kumara
- Department of Electrical EngineeringChalmers University of Technology Göteborg Sweden
| | - Amir Masoud Pourrahimi
- Department of Chemistry and Chemical EngineeringChalmers University of Technology Göteborg Sweden
| | - Yingwei Ouyang
- Department of Chemistry and Chemical EngineeringChalmers University of Technology Göteborg Sweden
| | | | | | - Xiangdong Xu
- Department of Electrical EngineeringChalmers University of Technology Göteborg Sweden
| | - Oscar Prieto
- Innovation & Technology Borealis AB, Stenungsund Sweden
| | - Christian Müller
- Department of Chemistry and Chemical EngineeringChalmers University of Technology Göteborg Sweden
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64
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Structure, rheological and responsive properties of a new mixed viscoelastic surfactant system. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124284] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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65
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Electrospinning of biocompatible alginate-based nanofiber membranes via tailoring chain flexibility. Carbohydr Polym 2020; 230:115665. [DOI: 10.1016/j.carbpol.2019.115665] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 11/22/2019] [Accepted: 11/22/2019] [Indexed: 12/27/2022]
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66
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Cole DP, Gardea F, Henry TC, Seppala JE, Garboczi EJ, Migler KD, Shumeyko CM, Westrich JR, Orski SV, Gair JL. AMB2018-03: Benchmark Physical Property Measurements for Material Extrusion Additive Manufacturing of Polycarbonate. INTEGRATING MATERIALS AND MANUFACTURING INNOVATION 2020; 9:10.1007/s40192-020-00188-y. [PMID: 38486805 PMCID: PMC10938461 DOI: 10.1007/s40192-020-00188-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 09/29/2020] [Indexed: 03/17/2024]
Abstract
Material extrusion (MatEx) is finding increasing applications in additive manufacturing of thermoplastics due to the ease of use and the ability to process disparate polymers. Since part strength is anisotropic and frequently deviates negatively with respect to parts produced by injection molding, an urgent challenge is to predict final properties of parts made through this method. A nascent effort is underway to develop theoretical and computational models of MatEx part properties, but these efforts require comprehensive experimental data for guidance and validation. As part of the AM-Bench framework, we provide here a thorough set of measurements on a model system: polycarbonate printed in a simple rectangular shape. For the precursor material (as-received filament), we perform rheology, gel permeation chromatography, and dynamical mechanical analysis, to ascertain critical material parameters such as molar mass distribution, glass transition, and shear thinning. Following processing, we conduct X-ray computed tomography, scanning electron microscopy, depth sensing indentation, and atomic force microscopy modulus mapping. These measurements provide information related to pores, method of failure, and local modulus variations. Finally, we conduct tensile testing to assess strength and degree of anisotropy of mechanical properties. We find several effects that lead to degradation of tensile properties including the presence of pore networks, poor interfacial bonding, variations in interfacial mechanical behavior between rasters, and variable interaction of the neighboring builds within the melt state. The results provide insight into the processing-structure-property relationships and should serve as benchmarks for the development of mechanical models.
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Affiliation(s)
- Daniel P. Cole
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
| | - Frank Gardea
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
| | - Todd C. Henry
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
| | - Jonathan E. Seppala
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Edward J. Garboczi
- Applied Chemicals and Materials Division, National Institute of Standards and Technology, Boulder, CO, USA
| | - Kalman D. Migler
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Christopher M. Shumeyko
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
| | - Jeffrey R. Westrich
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
| | - Sara V. Orski
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
| | - Jeffrey L. Gair
- Vehicle Technology Directorate, CCDC US Army Research Laboratory, Aberdeen Proving Ground, MD, USA
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67
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Affiliation(s)
- Carlos G. Lopez
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany
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68
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Ye YN, Cui K, Indei T, Nakajima T, Hourdet D, Kurokawa T, Gong JP. Relaxation Dynamics and Underlying Mechanism of a Thermally Reversible Gel from Symmetric Triblock Copolymer. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01856] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Dominique Hourdet
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS, Paris F-75005, France
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69
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Dreux X, Majesté JC, Carrot C, Argoud A, Vergelati C. Viscoelastic behaviour of cellulose acetate/triacetin blends by rheology in the melt state. Carbohydr Polym 2019; 222:114973. [PMID: 31320052 DOI: 10.1016/j.carbpol.2019.114973] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/02/2019] [Accepted: 06/05/2019] [Indexed: 11/28/2022]
Abstract
The viscoelastic behaviour of cellulose acetate with a degree of substitution (DS) of 245 plasticized by triacetin was studied at short times by dynamic oscillatory measurements. Two distinct regimes and unexpected scaling behaviour according to plasticizer content were highlighted. The dynamics of chains and their structural organization are not modified up to 35 wt% of triacetin. The rheological behaviour is led by a constant correlation length corresponding to the distance between strong intermolecular interactions subsisting in the melt state at high temperature even in the presence of plasticizer. This particular structure involves the apparition of strain hardening effects during uniaxial extensional flow tests and an important elasticity corresponding to the apparition of a Weissenberg effect at really low shear rates during shear sweeps. Intramolecular hydrogen bonds are responsible of the high rigidity of cellulose acetate chains. Plasticized cellulose acetate in the melt state belongs to the class of associating polymers and its rheological behaviour is mainly led by stickers.
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Affiliation(s)
- Xavier Dreux
- Univ Lyon, UJM-Saint-Etienne, CNRS, IMP UMR 5223, F-42023, SAINT-ETIENNE, France.
| | - Jean-Charles Majesté
- Univ Lyon, UJM-Saint-Etienne, CNRS, IMP UMR 5223, F-42023, SAINT-ETIENNE, France.
| | - Christian Carrot
- Univ Lyon, UJM-Saint-Etienne, CNRS, IMP UMR 5223, F-42023, SAINT-ETIENNE, France.
| | - Alexandra Argoud
- Solvay in Axel'One, 87 avenue des Frères Perret CS 70061, F-69192, SAINT-FONS, France.
| | - Caroll Vergelati
- Solvay in Axel'One, 87 avenue des Frères Perret CS 70061, F-69192, SAINT-FONS, France.
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70
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Costanzo S, Scherz L, Floudas G, Pasquino R, Kröger M, Schlüter AD, Vlassopoulos D. Hybrid Dendronized Polymers as Molecular Objects: Viscoelastic Properties in the Melt. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01412] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Salvatore Costanzo
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, Heraklion 70013, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 71003, Crete, Greece
- DICMAPI, University of Naples, P.le Tecchio 80, Naples 80125, Italy
| | - Leon Scherz
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - George Floudas
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Rossana Pasquino
- DICMAPI, University of Naples, P.le Tecchio 80, Naples 80125, Italy
| | - Martin Kröger
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - A. Dieter Schlüter
- Polymer Chemistry and Polymer Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure and Laser, Foundation for Research and Technology—Hellas, Heraklion 70013, Crete, Greece
- Department of Materials Science and Technology, University of Crete, Heraklion 71003, Crete, Greece
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71
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Affiliation(s)
- Cong Du
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC H3A 0C5, Canada
| | - Reghan J. Hill
- Department of Chemical Engineering, McGill University, 3610 University Street, Montreal, QC H3A 0C5, Canada
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72
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Lopez CG. Entanglement Properties of Polyelectrolytes in Salt-Free and Excess-Salt Solutions. ACS Macro Lett 2019; 8:979-983. [PMID: 35619486 DOI: 10.1021/acsmacrolett.9b00161] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We study the entanglement properties of polyelectrolytes in salt-free and excess-salt solutions, corresponding to rod-like and expanded coil conformations, respectively. While the solvent's ionic strength has a large impact on the conformation of polyelectrolytes, it does not affect its entanglement density and entanglement crossover. This contradicts current models of polymer entanglement and suggests that the density of binary contacts in solution is not affected by the solvent quality. Based on this observation, we work out the reptation dynamics of polyelectrolytes in salt-free solution, which differ appreciably from earlier models.
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Affiliation(s)
- Carlos G. Lopez
- Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, 52056 Aachen, Germany
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73
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Lemarchand CA, Bousquet D, Schnell B, Pineau N. A parallel algorithm to produce long polymer chains in molecular dynamics. J Chem Phys 2019; 150:224902. [DOI: 10.1063/1.5065785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | - B. Schnell
- MICHELIN, 23 Place des Carmes Déchaux, 63040 Clermont-Ferrand, France
| | - N. Pineau
- CEA-DAM-DIF, F-91297 Arpajon, France
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74
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Liu Y, Liu G, Zhang W, Du C, Wesdemiotis C, Cheng SZD. Cooperative Soft-Cluster Glass in Giant Molecular Clusters. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00549] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yuchu Liu
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
- College of Polymer Science and Polymer Engineering, Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - GengXin Liu
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
| | - Wei Zhang
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Chen Du
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Chrys Wesdemiotis
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Stephen Z. D. Cheng
- Center for Advanced Low-Dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, South China University of Technology, Guangzhou 510640, China
- College of Polymer Science and Polymer Engineering, Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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75
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Shchetnikava V, Slot J, van Ruymbeke E. Comparative Analysis of Different Tube Models for Linear Rheology of Monodisperse Linear Entangled Polymers. Polymers (Basel) 2019; 11:polym11050754. [PMID: 31035419 PMCID: PMC6572337 DOI: 10.3390/polym11050754] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 04/10/2019] [Accepted: 04/22/2019] [Indexed: 12/02/2022] Open
Abstract
The aim of the present paper is to analyse the differences between tube-based models which are widely used for predicting the linear viscoelasticity of monodisperse linear polymers, in comparison to a large set of experimental data. The following models are examined: Milner–McLeish, Likhtman–McLeish, the Hierarchical model proposed by the group of Larson, the BoB model of Das and Read, and the TMA model proposed by the group of van Ruymbeke. This comparison allows us to highlight and discuss important questions related to the relaxation of entangled polymers, such as the importance of the contour-length fluctuations (CLF) process and how it affects the reptation mechanism, or the contribution of the constraint release (CR) process on the motion of the chains. In particular, it allows us to point out important approximations, inherent in some models, which result in an overestimation of the effect of CLF on the reptation time. On the contrary, by validating the TMA model against experimental data, we show that this effect is underestimated in TMA. Therefore, in order to obtain accurate predictions, a novel modification to the TMA model is proposed. Our current work is a continuation of earlier research (Shchetnikava et al., 2014), where a similar analysis is performed on well-defined star polymers.
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Affiliation(s)
- Volha Shchetnikava
- Department of Mathematics and Computer Science, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
- Dutch Polymer Institute (DPI), 5600 AX Eindhoven, The Netherlands.
| | - Johan Slot
- Department of Mathematics and Computer Science, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.
| | - Evelyne van Ruymbeke
- Bio and Soft Matter Group, Institute of Condensed Matter and Nanosciences, École Polytechnique de Louvain, Université catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium.
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76
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Pawlak A. The Entanglements of Macromolecules and Their Influence on the Properties of Polymers. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900043] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Andrzej Pawlak
- Centre of Molecular and Macromolecular StudiesPolish Academy of Sciences Sienkiewicza 112 90‐363 Lodz Poland
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77
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Lentzakis H, Costanzo S, Vlassopoulos D, Colby RH, Read DJ, Lee H, Chang T, van Ruymbeke E. Constraint Release Mechanisms for H-Polymers Moving in Linear Matrices of Varying Molar Masses. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00251] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Helen Lentzakis
- Institute of Electronic Structure & Laser, Heraklion, Foundation for Research and Technology Hellas (FORTH), Heraklion, Crete 70013, Greece
- Department of Materials Science & Technology, University of Crete, Heraklion, Crete 70013, Greece
| | - Salvatore Costanzo
- Institute of Electronic Structure & Laser, Heraklion, Foundation for Research and Technology Hellas (FORTH), Heraklion, Crete 70013, Greece
- Department of Materials Science & Technology, University of Crete, Heraklion, Crete 70013, Greece
| | - Dimitris Vlassopoulos
- Institute of Electronic Structure & Laser, Heraklion, Foundation for Research and Technology Hellas (FORTH), Heraklion, Crete 70013, Greece
- Department of Materials Science & Technology, University of Crete, Heraklion, Crete 70013, Greece
| | - Ralph H. Colby
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, State College, Pennsylvania 16802, United States
| | - Daniel Jon Read
- Department of Applied Mathematics, University of Leeds, Leeds LS2 9JT, U.K
| | - Hyojoon Lee
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Evelyne van Ruymbeke
- Bio and Soft Matter, Institute on Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain (UCL), Louvain 1348, Belgium
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78
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Panagiotou E, Millett KC, Atzberger PJ. Topological Methods for Polymeric Materials: Characterizing the Relationship Between Polymer Entanglement and Viscoelasticity. Polymers (Basel) 2019; 11:E437. [PMID: 30960421 PMCID: PMC6473770 DOI: 10.3390/polym11030437] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/12/2019] [Accepted: 02/26/2019] [Indexed: 12/31/2022] Open
Abstract
We develop topological methods for characterizing the relationship between polymer chain entanglement and bulk viscoelastic responses. We introduce generalized Linking Number and Writhe characteristics that are applicable to open linear chains. We investigate the rheology of polymeric chains entangled into weaves with varying topologies and levels of chain density. To investigate viscoelastic responses, we perform non-equilibrium molecular simulations over a range of frequencies using sheared Lees⁻Edwards boundary conditions. We show how our topological characteristics can be used to capture key features of the polymer entanglements related to the viscoelastic responses. We find there is a linear relation over a significant range of frequencies between the mean absolute Writhe W r and the Loss Tangent tan ( δ ) . We also find an approximate inverse linear relationship between the mean absolute Periodic Linking Number L K P and the Loss Tangent tan ( δ ) . Our results show some of the ways topological methods can be used to characterize chain entanglements to better understand the origins of mechanical responses in polymeric materials.
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Affiliation(s)
- Eleni Panagiotou
- Department of Mathematics and SimCenter, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA.
| | - Kenneth C Millett
- Department of Mathematics, University of California Santa Barbara, Santa Barbara, CA 93106-3080, USA.
| | - Paul J Atzberger
- Department of Mathematics and Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara, CA 93106-3080, USA.
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79
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Gold BJ, Pyckhout-Hintzen W, Wischnewski A, Radulescu A, Monkenbusch M, Allgaier J, Hoffmann I, Parisi D, Vlassopoulos D, Richter D. Direct Assessment of Tube Dilation in Entangled Polymers. PHYSICAL REVIEW LETTERS 2019; 122:088001. [PMID: 30932610 DOI: 10.1103/physrevlett.122.088001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Indexed: 06/09/2023]
Abstract
A key ingredient within theories focusing on the rheology of entangled polymers is the way how the topological constraints of an entangled chain are lifted by unconstrained segments, i.e., how the constraining tube is dilated. This important question has been addressed by directly measuring the tube diameter d at the scale of the tube by neutron spin echo spectroscopy. The tube diameter d and plateau modulus G_{N}^{0} of highly entangled polyethylene oxide (PEO) chains of volume fraction c that are diluted by low molecular PEO show a concentration dependence d∝c^{a/2} and G_{N}^{0}∝c^{1+a} with an exponent a close to 4/3. This result allows the clear discrimination between different theoretical models that predict 4/3 or other values between 1 and 2 and provides an important ingredient to tube model theories.
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Affiliation(s)
- B J Gold
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - W Pyckhout-Hintzen
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - A Wischnewski
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - A Radulescu
- Jülich Centre for Neutron Science (JCNS) at Maier Leibnitz-Zentrum, Forschungszentrum Jülich GmbH, 85747 Garching, Germany
| | - M Monkenbusch
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - J Allgaier
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - I Hoffmann
- Institute Laue Langevin (ILL), 3800 Grenoble, France
| | - D Parisi
- Institute of Electronic Structure and Laser, FORTH, 70013 Heraklion, Crete, Greece and Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Crete, Greece
| | - D Vlassopoulos
- Institute of Electronic Structure and Laser, FORTH, 70013 Heraklion, Crete, Greece and Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Crete, Greece
- Department of Materials Science and Technology, University of Crete, 70013 Heraklion, Crete, Greece
| | - D Richter
- Jülich Centre for Neutron Science (JCNS) and Institute for Complex Systems (ICS), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
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80
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Alshammasi MS, Escobedo FA. Correlation between morphology and anisotropic transport properties of diblock copolymers melts. SOFT MATTER 2019; 15:851-859. [PMID: 30548034 DOI: 10.1039/c8sm02095g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Molecular simulations of coarse-grained diblock copolymers (DBP) were conducted to study the effect of segregation strength and morphology on transport properties. It was found that in the strong segregation limit (i.e., high χN, where χ is the Flory-Huggins parameter and N is the degree of polymerization), the presence of the DBP interfaces imposes topological constraints similar to those of entanglements as manifested in the rheological signature of the polymer (i.e., a plateau modulus). Furthermore, compared to the behavior of isotropic melts, the crossover from Rouse to reptation scaling of the self-diffusion coefficient (D) parallel to the DBP interface takes place at a smaller N, an effect that depends on temperature and is more pronounced in the Lamellae morphology than in the hexagonal cylinder morphology. Additionally, it is shown that for an entangled melt (i.e., N ≫ Ne where Ne is the entanglement length) block retraction is instrumental for chains to diffuse parallel to the interface of lamellar layers. Lastly, it is found that the anisotropic viscosity of different morphologies is mostly affected by the orientation of the chains relative to the shear flow direction, exhibiting reduced values when chains align in the neutral or flow directions.
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Affiliation(s)
- Mohammed Suliman Alshammasi
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA.
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81
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López-Barrón CR, Shivokhin ME. Extensional Strain Hardening in Highly Entangled Molecular Bottlebrushes. PHYSICAL REVIEW LETTERS 2019; 122:037801. [PMID: 30735410 DOI: 10.1103/physrevlett.122.037801] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Indexed: 06/09/2023]
Abstract
The highly strained conformation in dense molecular bottlebrushes (DB) has profound effects on the dynamics of these type of macromolecules. Understanding of such effects in both their linear and nonlinear viscoelastic responses is crucial for their design and processing. The nonlinear response of poly(1-octadecene), a highly entangled α-olefin DB with linear side chains sixteen carbons long, is studied here and compared to the nonlinear response of a linear polyolefin (polypropylene) with equivalent linear viscoelastic response. We found that the DB shows remarkably larger extensional strain hardening (SH) and extensibility than the linear polyolefin. The strong SH is attributed to a strain-induced increase in friction drag between adjacent chains resulting from side-chain interdigitation and alignment perpendicular to the flow. The higher extensibility of DBs compared to linear counterparts has been predicted previously [Daniel et al., Nat. Mater. 15, 183 (2015)NMAACR1476-1122] and confirmed here for the first time in DB melts.
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82
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Seo Y, Seo Y. Effect of Molecular Structure Change on the Melt Rheological Properties of a Polyamide (Nylon 6). ACS OMEGA 2018; 3:16549-16555. [PMID: 31458288 PMCID: PMC6644126 DOI: 10.1021/acsomega.8b02355] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 11/20/2018] [Indexed: 06/10/2023]
Abstract
Tailoring the polymer melt rheology and the chain relaxation dynamics permits easy handling of polymer processing and enables broader range of applications. Novel strategy to control the polymer melt rheology and the chain relaxation dynamics was devised. A simple process for molecular structural change in a polyamide (nylon 6) to easily generate a long-chain branching in a controllable manner without forming a network structure led to unusually large enhancements in the relaxation dynamics. The zero shear viscosity of the polyamide has increased more than 200 folds of linear chains viscosity, whereas the molar mass change was ca. 1.6 times. Storage modulus and the loss modulus at low frequency increased more than 104 and 103 times to those of neat polyamide without forming a network structure. The rheological properties of the polymer (nylon 6) melts can be finely tailored by this simple process to cover a broad range of applications.
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83
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84
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Different responsiveness to hydrocarbons of linear and branched anionic/cationic-mixed wormlike surfactant micelles. Colloid Polym Sci 2018. [DOI: 10.1007/s00396-018-4428-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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85
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Nettle CJ, Jenkins L, Curtis D, Badiei N, Lewis K, Williams PR, Daniels DR. Linear rheology as a potential monitoring tool for sputum in patients with Chronic Obstructive Pulmonary Disease (COPD). Biorheology 2018; 54:67-80. [PMID: 29278868 DOI: 10.3233/bir-17141] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The rheological properties of sputum may influence lung function and become modified in disease. OBJECTIVE This study aimed to correlate the viscoelastic properties of sputum with clinical data on the severity of disease in patients with chronic obstructive pulmonary disease (COPD). METHODS Sputum samples from COPD patients were investigated using rheology, simple mathematical modelling and Scanning Electron Microscopy (SEM). The samples were all collected from patients within two days of their admission to Prince Philip Hospital due to an exacerbation of their COPD. Oscillatory and creep rheological techniques were used to measure changes in viscoelastic properties at different frequencies over time. RESULTS COPD sputum was observed to behave as a viscoelastic solid at all frequencies studied. Comparing the rheology of exacerbated COPD sputum with healthy sputum (not diagnosed with a respiratory disease) revealed significant differences in response to oscillatory shear and creep-recovery experiments, which highlights the potential clinical benefits of better understanding sputum viscoelasticity. A common power law model G(t)=G0(tτ0)-m was successfully fitted to experimental rheology data over the range of frequencies studied. CONCLUSIONS A comparison between clinical data and the power law index m obtained from rheology, suggested that an important possible future application of this parameter is as a potential biomarker for COPD severity.
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Affiliation(s)
- C J Nettle
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - L Jenkins
- Prince Philip Hospital, Hywel Dda University Health Board, Llanelli SA14 8QF, UK
| | - D Curtis
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - N Badiei
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - K Lewis
- Prince Philip Hospital, Hywel Dda University Health Board, Llanelli SA14 8QF, UK.,School of Medicine, Institute of Life Sciences, Swansea University, Swansea SA2 8PP, UK
| | - P R Williams
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
| | - D R Daniels
- College of Engineering, Swansea University, Bay Campus, Swansea SA1 8EN, UK
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86
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López-Barrón CR, Tsou AH, Hagadorn JR, Throckmorton JA. Highly Entangled α-Olefin Molecular Bottlebrushes: Melt Structure, Linear Rheology, and Interchain Friction Mechanism. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01431] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | - Andy H. Tsou
- ExxonMobil Chemical Company, Baytown, Texas 77520, United States
| | - John R. Hagadorn
- ExxonMobil Chemical Company, Baytown, Texas 77520, United States
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87
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Li J, Zhang Z, Cao X, Liu Y, Chen Q. The role of electrostatic repulsion in the gelation of poly(vinyl alcohol)/borax aqueous solutions. SOFT MATTER 2018; 14:6767-6773. [PMID: 30066707 DOI: 10.1039/c8sm01019f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study examined linear viscoelasticity (LVE) of semidilute non-entangled poly(vinyl alcohol) (PVA) and borax aqueous solutions: one borax molecule dissociates into two B(OH)3 molecules and two B(OH)4- ions, and the latter can crosslink the PVA chains. Gelation was observed with increasing concentration of borax in the solutions. Analysis of LVE with the reversible gelation model reveals that although the number density of crosslinking ions increases with increasing concentration of borax, the fraction of the crosslinking ions decreases, which is attributed to the intensified electrostatic repulsion when more sites of the PVA chains are occupied by the ionic crosslinkers.
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Affiliation(s)
- Jingjing Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Science and Technology of China, Changchun 130022, China.
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88
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Efficient Determination of Slip-Link Parameters from Broadly Polydisperse Linear Melts. Polymers (Basel) 2018; 10:polym10080908. [PMID: 30960833 PMCID: PMC6403776 DOI: 10.3390/polym10080908] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/04/2018] [Accepted: 08/07/2018] [Indexed: 11/17/2022] Open
Abstract
We investigate the ability of a coarse-grained slip-link model and a simple double reptation model to describe the linear rheology of polydisperse linear polymer melts. Our slip-link model is a well-defined mathematical object that can describe the equilibrium dynamics and non-linear rheology of flexible polymer melts with arbitrary polydispersity and architecture with a minimum of inputs: the molecular weight of a Kuhn step, the entanglement activity, and Kuhn step friction. However, this detailed model is computationally expensive, so we also examine predictions of the cheaper double reptation model, which is restricted to only linear rheology near the terminal zone. We report the storage and loss moduli for polydisperse polymer melts and compare with experimental measurements from small amplitude oscillatory shear. We examine three chemistries: polybutadiene, polypropylene and polyethylene. We also use a simple double reptation model to estimate parameters for the slip-link model and examine under which circumstances this simplified model works. The computational implementation of the slip-link model is accelerated with the help of graphics processing units, which allow us to simulate in parallel large ensembles made of up to 50,000 chains. We show that our simulation can predict the dynamic moduli for highly entangled polymer melts over nine decades of frequency. Although the double reptation model performs well only near the terminal zone, it does provide a convenient and inexpensive way to estimate the entanglement parameter for the slip-link model from polydisperse data.
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89
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Gote RP, Mandal D, Patel K, Chaudhuri K, Vinod CP, Lele AK, Chikkali SH. Judicious Reduction of Supported Ti Catalyst Enables Access to Disentangled Ultrahigh Molecular Weight Polyethylene. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00590] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | | | - Krishnaroop Chaudhuri
- Academy of
Scientific
and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
| | | | | | - Samir H. Chikkali
- Academy of
Scientific
and Innovative Research (AcSIR), Anusandhan Bhawan, 2 Rafi Marg, New Delhi 110001, India
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90
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Wittenberg E, Meyer A, Eggers S, Abetz V. Hydrogen bonding and thermoplastic elastomers - a nice couple with temperature-adjustable mechanical properties. SOFT MATTER 2018; 14:2701-2711. [PMID: 29564456 DOI: 10.1039/c8sm00296g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Styrene-butadiene copolymers are modified with varying fractions of benzoic acid moieties being able to perform hydrogen bonding. This is done by using a simple synthetic approach which utilizes click chemistry. Temperature-dependent dynamic mechanical properties are studied, and it turns out that even the apparently rather simple hydrogen bonding motif has a marked impact on the material properties due to the fact that it facilitates the formation of a supramolecular polymer network. Besides a glass transition, the investigated functionalized copolymers exhibit a second endothermic transition, known as a quasi-melting. This is related to the opening of the hydrogen bonding complexes. Additionally to dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), temperature-dependent infrared (IR) spectroscopy and small angle X-ray scattering (SAXS) are used to understand the structure-property relationships.
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Affiliation(s)
- Elisabeth Wittenberg
- Department of Physical Chemistry, University of Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany.
| | - Andreas Meyer
- Department of Physical Chemistry, University of Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany.
| | - Steffen Eggers
- Department of Physical Chemistry, University of Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany.
| | - Volker Abetz
- Department of Physical Chemistry, University of Hamburg, Martin-Luther-King Platz 6, 20146, Hamburg, Germany. and Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH, Institute of Polymer Science, Max-Planck-Straße 1, 21502 Geesthacht, Germany
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91
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Kieber RJ, Neary WJ, Kennemur JG. Viscoelastic, Mechanical, and Glasstomeric Properties of Precision Polyolefins Containing a Phenyl Branch at Every Five Carbons. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b05395] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert J. Kieber
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - William J. Neary
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Justin G. Kennemur
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
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92
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Sangroniz L, Barbieri F, Cavallo D, Santamaria A, Alamo R, Müller A. Rheology of self-nucleated poly(ɛ-caprolactone) melts. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.01.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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93
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Shibaev AV, Makarov AV, Kuklin AI, Iliopoulos I, Philippova OE. Role of Charge of Micellar Worms in Modulating Structure and Rheological Properties of Their Mixtures with Nonionic Polymer. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02246] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Anton V. Makarov
- Physics
Department, Moscow State University, 119991 Moscow, Russia
| | | | - Ilias Iliopoulos
- PIMM, ENSAM, CNRS,
CNAM, 151 boulevard de l’Hôpital, 75013 Paris, France
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94
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Yoon H, McKenna GB. “Rubbery Stiffening” and Rupture Behavior of Freely Standing Nanometric Thin PIB Films. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Heedong Yoon
- Department of Chemical Engineering,
Whitacre College of Engineering, Texas Tech University, Lubbock, Texas 79409-4121, United States
| | - Gregory B. McKenna
- Department of Chemical Engineering,
Whitacre College of Engineering, Texas Tech University, Lubbock, Texas 79409-4121, United States
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95
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López-Barrón CR, Zhou H, Younker JM, Mann JA. Molecular Structure, Chain Dimensions, and Linear Rheology of Poly(4-vinylbiphenyl). Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01564] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Huaxing Zhou
- ExxonMobil
Research
and Engineering Company, Annandale, New Jersey 08801, United States
| | - Jarod M. Younker
- ExxonMobil Chemical
Company, Baytown, Texas 77520, United States
| | - Jason A. Mann
- ExxonMobil Chemical
Company, Baytown, Texas 77520, United States
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96
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Seppala JE, Hoon Han S, Hillgartner KE, Davis CS, Migler KB. Weld formation during material extrusion additive manufacturing. SOFT MATTER 2017; 13:6761-6769. [PMID: 28819658 PMCID: PMC5684701 DOI: 10.1039/c7sm00950j] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Material extrusion (ME) is a layer-by-layer additive manufacturing process that is now used in personal and commercial production where prototyping and customization are required. However, parts produced from ME frequently exhibit poor mechanical performance relative to those from traditional means; moreover, fundamental knowledge of the factors leading to development of inter-layer strength in this highly non-isothermal process is limited. In this work, we seek to understand the development of inter-layer weld strength from the perspective of polymer interdiffusion under conditions of rapidly changing mobility. Our framework centers around three interrelated components: in situ thermal measurements (via infrared imaging), temperature dependent molecular processes (via rheology), and mechanical testing (via mode III fracture). We develop the concept of an equivalent isothermal weld time and test its relationship to fracture energy. For the printing conditions studied the equivalent isothermal weld time for Tref = 230 °C ranged from 0.1 ms to 100 ms. The results of these analysis provide a basis for optimizing inter-layer strength, the limitations of the ME process, and guide development of new materials.
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Affiliation(s)
- Jonathan E Seppala
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
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97
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Kwiatkowski AL, Sharma H, Molchanov VS, Orekhov AS, Vasiliev AL, Dormidontova EE, Philippova OE. Wormlike Surfactant Micelles with Embedded Polymer Chains. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01500] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | - Hari Sharma
- Polymer
Program, Institute of Materials Science and Physics Department, University of Connecticut, Storrs, Connecticut 06269, United States
| | | | - Anton S. Orekhov
- National
Research Centre “Kurchatov Institute”, 123182 Moscow, Russia
| | | | - Elena E. Dormidontova
- Polymer
Program, Institute of Materials Science and Physics Department, University of Connecticut, Storrs, Connecticut 06269, United States
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98
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Liu G, Feng X, Lang K, Zhang R, Guo D, Yang S, Cheng SZD. Dynamics of Shape-Persistent Giant Molecules: Zimm-like Melt, Elastic Plateau, and Cooperative Glass-like. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01058] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- GengXin Liu
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Xueyan Feng
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Kening Lang
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Ruimeng Zhang
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Dong Guo
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Shuguang Yang
- Center
for Advanced Low-Dimension Materials, Donghua University, Shanghai 201620, China
| | - Stephen Z. D. Cheng
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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99
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Hong SB, Hong SJ, Kang TH, Youk JH, Yu WR. Optical and shape memory properties of semicrystalline poly(cyclooctene) upon cold-drawing. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24415] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Seok Bin Hong
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM); Seoul National University, 1 Gwanangno; Gwanak-gu Seoul 151-742 Republic of Korea
| | - Seok Jin Hong
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM); Seoul National University, 1 Gwanangno; Gwanak-gu Seoul 151-742 Republic of Korea
| | - Tae-Hyung Kang
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM); Seoul National University, 1 Gwanangno; Gwanak-gu Seoul 151-742 Republic of Korea
| | - Ji Ho Youk
- Department of Applied Organic Materials Engineering; Inha University; In-cheon 402-751 Republic of Korea
| | - Woong-Ryeol Yu
- Department of Materials Science and Engineering and Research Institute of Advanced Materials (RIAM); Seoul National University, 1 Gwanangno; Gwanak-gu Seoul 151-742 Republic of Korea
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100
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Georgopanos P, Schneider GA, Dreyer A, Handge UA, Filiz V, Feld A, Yilmaz ED, Krekeler T, Ritter M, Weller H, Abetz V. Exceptionally strong, stiff and hard hybrid material based on an elastomer and isotropically shaped ceramic nanoparticles. Sci Rep 2017; 7:7314. [PMID: 28779139 PMCID: PMC5544721 DOI: 10.1038/s41598-017-07521-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 06/29/2017] [Indexed: 11/22/2022] Open
Abstract
In this work the fabrication of hard, stiff and strong nanocomposites based on polybutadiene and iron oxide nanoparticles is presented. The nanocomposites are fabricated via a general concept for mechanically superior nanocomposites not based on the brick and mortar structure, thus on globular nanoparticles with nanosized organic shells. For the fabrication of the composites oleic acid functionalized iron oxide nanoparticles are decorated via ligand exchange with an α,ω-polybutadiene dicarboxylic acid. The functionalized particles were processed at 145 °C. Since polybutadiene contains double bonds the nanocomposites obtained a crosslinked structure which was enhanced by the presence of oxygen or sulfur. It was found that the crosslinking and filler percolation yields high elastic moduli of approximately 12–20 GPa and hardness of 15–18 GPa, although the polymer volume fraction is up to 40%. We attribute our results to a catalytically enhanced crosslinking reaction of the polymer chains induced by oxygen or sulfur and to the microstructure of the nanocomposite.
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Affiliation(s)
- Prokopios Georgopanos
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany
| | - Gerold A Schneider
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073, Hamburg, Germany.
| | - Axel Dreyer
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073, Hamburg, Germany
| | - Ulrich A Handge
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany
| | - Volkan Filiz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany
| | - Artur Feld
- Institute of Physical Chemistry, Hamburg University, Martin-Luther-King-Platz 6, D-20146, Hamburg, Germany
| | - Ezgi D Yilmaz
- Institute of Advanced Ceramics, Hamburg University of Technology, Denickestrasse 15, D-21073, Hamburg, Germany
| | - Tobias Krekeler
- Electron Microscopy Unit, Hamburg University of Technology, Eißendorferstraße 42, D-21073, Hamburg, Germany
| | - Martin Ritter
- Electron Microscopy Unit, Hamburg University of Technology, Eißendorferstraße 42, D-21073, Hamburg, Germany
| | - Horst Weller
- Institute of Physical Chemistry, Hamburg University, Martin-Luther-King-Platz 6, D-20146, Hamburg, Germany
| | - Volker Abetz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, D-21502, Geesthacht, Germany. .,Institute of Physical Chemistry, Hamburg University, Martin-Luther-King-Platz 6, D-20146, Hamburg, Germany.
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