1
|
Sheveleva NN, Komolkin AV, Markelov DA. Influence of the Chemical Structure on the Mechanical Relaxation of Dendrimers. Polymers (Basel) 2023; 15:polym15040833. [PMID: 36850117 PMCID: PMC9965359 DOI: 10.3390/polym15040833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/30/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023] Open
Abstract
The rheological properties of macromolecules represent one of the fundamental features of polymer systems which expand the possibilities of using and developing new materials based on them. In this work, we studied the shear-stress relaxation of the second generation PAMAM and PPI dendrimer melts by atomistic molecular dynamics simulation. The time dependences of relaxation modulus G(t) and the frequency dependences of the storage G'(ω) and loss G″(ω) moduli were obtained. The results were compared with the similar dependences for the polycarbosilane (PCS) dendrimer of the same generation. The chemical structure of the dendrimer segments has been found to strongly influence their mechanical relaxation. In particular, it has been shown that hydrogen bonding in PAMAM dendrimers leads to an entanglement of macromolecules and the region is observed where G'(ω) > G″(ω). This slows down the mechanical relaxation and rotational diffusion of macromolecules. We believe that our comprehensive research contributes to the systematization of knowledge about the rheological properties of dendrimers.
Collapse
|
2
|
Bakshi AK, Ghosh AK. Processability and physico‐mechanical properties of ultrahigh‐molecular‐weight polyethylene using low‐molecular‐weight olefin wax. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ashok Kumar Bakshi
- Department of Materials Science and Engineering Indian Institute of Technology Delhi, Hauz Khas New Delhi India
| | - Anup K. Ghosh
- Department of Materials Science and Engineering Indian Institute of Technology Delhi, Hauz Khas New Delhi India
| |
Collapse
|
3
|
Sheveleva NN, Dolgushev M, Lähderanta E, Markelov DA. Mechanical relaxation of functionalized carbosilane dendrimer melts. Phys Chem Chem Phys 2022; 24:13049-13056. [PMID: 35583592 DOI: 10.1039/d2cp00805j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functionalizing the internal structure of classical dendrimers is a new way of tailoring their properties. Using atomistic molecular dynamics simulations, we investigate the rheological behavior of functionalized dendrimer (FD) melts obtained by modifying the branching of carbosilane dendrimers (CSD). The time (relaxation modulus G(t)) and frequency (storage G' and loss G'' moduli) dependencies of the dynamic modulus are obtained. Fourth generation FD melts present a region where G' > G''. In contrast, their non-functionalized counterparts (i.e., classical dendrimers with regular branching) do not show such a region. The comparative analysis of FD and CSD suggests that the internal densification due to functionalization prevents the penetration of branches and causes FD to behave like colloidal particles in a crowded environment. Since CSD have no special interactions, we expect that this effect will be common for other dendrimer macromolecules.
Collapse
Affiliation(s)
- Nadezhda N Sheveleva
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia. .,Department of Physics, LUT University, Box 20, 53851 Lappeenranta, Finland
| | - Maxim Dolgushev
- Sorbonne Université, CNRS, Laboratoire de Physique Théorique de la Matière Condensée, LPTMC, 4 place Jussieu, 75005 Paris, France.
| | - Erkki Lähderanta
- Department of Physics, LUT University, Box 20, 53851 Lappeenranta, Finland
| | - Denis A Markelov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia.
| |
Collapse
|
4
|
Jaisingh A, Kapur GS, Nebhani L. Tuning Melt Strength and Processability of Polyolefins by Addition of a Functionalized Additive Designed via the TEMPO-Driven Thiol-ene Reaction. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01190] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aanchal Jaisingh
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Gurpreet Singh Kapur
- Indian Oil Corporation Limited, R&D Division, Sector 13, Faridabad 121006, Haryana, India
| | - Leena Nebhani
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| |
Collapse
|
5
|
Panin SV, Buslovich DG, Dontsov YV, Bochkareva SA, Kornienko LA, Berto F. UHMWPE-Based Glass-Fiber Composites Fabricated by FDM. Multiscaling Aspects of Design, Manufacturing and Performance. MATERIALS 2021; 14:ma14061515. [PMID: 33808909 PMCID: PMC8003805 DOI: 10.3390/ma14061515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 11/16/2022]
Abstract
The aim of the paper was to improve the functional properties of composites based on ultra-high molecular weight polyethylene (UHMWPE) by loading with reinforcing fibers. It was achieved by designing the optimal composition for its subsequent use as a feedstock for 3D-printing of guides for roller and plate chains, conveyors, etc. As a result, it was experimentally determined that loading UHMWPE with 17% high density polyethylene grafted with VinylTriMethoxySilane (HDPE-g-VTMS) was able to bind 5% glass fillers of different aspect ratios, thereby determining the optimal mechanical and tribological properties of the composites. Further increasing the content of the glass fillers caused a deterioration in their tribological properties due to insufficient adhesion of the extrudable matrix due to the excessive filler loading. A multi-level approach was implemented to design the high-strength anti-friction ‘UHMWPE+17%HDPE-g-VTMS+12%PP’-based composites using computer-aided algorithms. This resulted in the determination of the main parameters that provided their predefined mechanical and tribological properties and enabled the assessment of the possible load-speed conditions for their operation in friction units. The uniform distribution of the fillers in the matrix, the pattern of the formed supermolecular structure and, as a consequence, the mechanical and tribological properties of the composites were achieved by optimizing the values of the main control parameters (the number of processing passes in the extruder and the aspect ratio of the glass fillers).
Collapse
Affiliation(s)
- Sergey V. Panin
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science SB RAS, 634055 Tomsk, Russia; (D.G.B.); (Y.V.D.); (S.A.B.); (L.A.K.)
- Department of Materials Science, Engineering School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, 634030 Tomsk, Russia
- Correspondence: ; Tel.: +7-3822-286-904
| | - Dmitry G. Buslovich
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science SB RAS, 634055 Tomsk, Russia; (D.G.B.); (Y.V.D.); (S.A.B.); (L.A.K.)
- Department of Materials Science, Engineering School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, 634030 Tomsk, Russia
| | - Yuri V. Dontsov
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science SB RAS, 634055 Tomsk, Russia; (D.G.B.); (Y.V.D.); (S.A.B.); (L.A.K.)
- Department of Materials Science, Engineering School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, 634030 Tomsk, Russia
| | - Svetlana A. Bochkareva
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science SB RAS, 634055 Tomsk, Russia; (D.G.B.); (Y.V.D.); (S.A.B.); (L.A.K.)
| | - Lyudmila A. Kornienko
- Laboratory of Mechanics of Polymer Composite Materials, Institute of Strength Physics and Materials Science SB RAS, 634055 Tomsk, Russia; (D.G.B.); (Y.V.D.); (S.A.B.); (L.A.K.)
| | - Filippo Berto
- Department of Mechanical and Industrial Engineering, Faculty of Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway;
| |
Collapse
|
6
|
The Influence of Pressure-Induced-Flow Processing on the Morphology, Thermal and Mechanical Properties of Polypropylene Blends. JOURNAL OF COMPOSITES SCIENCE 2021. [DOI: 10.3390/jcs5030064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The pressure-induced-flow (PIF) processing can effectively prepare high-performance polymer materials. This paper studies the influence of pressure-induced-flow processing on the morphology, thermodynamic and mechanical properties of polypropylene (PP)/polyamide 6 (PA6) blends, PP/polyolefin elastomer (POE) blends and PP/thermoplastic urethane (TPU) blends. The results show that pressure-induced-flow processing can significantly improve the thermodynamic and mechanical properties of the blends by regulating internal structure. Research shows that the pressure-induced-flow processing can increase the strength and the toughness of the blends, particularly in PP/TPU blends.
Collapse
|
7
|
Guo Z, Xu R, Xue P. Study on Preparation of Ultra-High-Molecular-Weight Polyethylene Pipe of Good Thermal-Mechanical Properties Modified with Organo-Montmorillonite by Screw Extrusion. MATERIALS 2020; 13:ma13153342. [PMID: 32727121 PMCID: PMC7435758 DOI: 10.3390/ma13153342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 11/16/2022]
Abstract
The study of processing characteristic and property optimization of ultra-high-molecular-weight polyethylene (UHMWPE) pipe is increasingly performed, mainly focusing on difficulties in the melting process and poor thermal-mechanical properties after forming, which have limited the wider engineering application of UHMWPE pipe. In this study, organo-montmorillonite (OMMT)-modified UHMWPE pipe with good thermal-mechanical properties was prepared by screw extrusion molding. First, high-density polyethylene was subjected to fluidity modification so that the screw extrusion molding of UHMWPE pipe was feasible. Then, OMMT-modified UHMWPE pipes under different addition amounts of OMMT were innovatively prepared by extrusion. Furthermore, the effects of the addition amounts of the compatibilizer HDPE-g-MAH and the silane coupling agent γ-(2,3-epoxy propoxy) propyl trimethoxy silane (KH560) on the thermal properties of OMMT-modified UHMWPE pipe were investigated for the first time. Compared with those of pure UHMWPE pipe, the Vicat softening temperature (from 128 to 135.2 °C), thermal deformation temperature (from 84.4 to 133.1 °C), bending strength (from 27.3 to 39.8 MPa), and tensile strength (from 20.8 to 25.1 MPa) of OMMT-modified UHMWPE pipe were greatly increased. OMMT-modified UHMWPE pipe with good thermal-mechanical properties was able to be prepared by extrusion for the first time. The compatibilizer method of HDPE-g-MAH was slightly more effective than the coupling agent method of KH560.
Collapse
Affiliation(s)
- Zhouchao Guo
- School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Rui Xu
- School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ping Xue
- School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| |
Collapse
|
8
|
Sheveleva NN, Dolgushev M, Lähderanta E, Markelov DA. NMR Relaxation of Functionalized Dendrimers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01427] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Nadezhda N. Sheveleva
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
- Department of Physics, LUT University, Box 20, Lappeenranta 53851, Finland
| | - Maxim Dolgushev
- Sorbonne Université, CNRS, Laboratoire de Physique Théorique de la Matière Condensée, LPTMC, Paris 75005, France
| | - Erkki Lähderanta
- Department of Physics, LUT University, Box 20, Lappeenranta 53851, Finland
| | - Denis A. Markelov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| |
Collapse
|
9
|
Li Z, Ye C, Feng L, Xia J, Zhang L, Zhao W, Hu Y. Crystal morphology and corresponding physical properties of nascent ultra-high molecular weight polyethylene powder with short-branched chains. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Dolgushev M, Markelov DA, Lähderanta E. Linear Viscoelasticity of Carbosilane Dendrimer Melts. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02250] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Maxim Dolgushev
- Sorbonne Université, CNRS, Laboratoire de Physique Théorique de la Matière Condensée, LPTMC, F-75005 Paris, France
| | - Denis A. Markelov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Erkki Lähderanta
- Department of Physics, Lappeenranta University of Technology, 53850 Lappeenranta, Finland
| |
Collapse
|
11
|
Fu D, Chen F, Peng X, Kuang T. Polyamide 6 modified polypropylene with remarkably enhanced mechanical performance, thermal properties, and foaming ability via
pressure-induced-flow processing approach. ADVANCES IN POLYMER TECHNOLOGY 2018. [DOI: 10.1002/adv.21945] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Dajiong Fu
- The Key Laboratory of Polymer Processing Engineering; Ministry of Education; South China University of Technology; Guangzhou China
- Kingfa Science and Technology Co. Ltd.; Guangzhou China
| | - Feng Chen
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou China
| | - Xiangfang Peng
- The Key Laboratory of Polymer Processing Engineering; Ministry of Education; South China University of Technology; Guangzhou China
| | - Tairong Kuang
- The Key Laboratory of Polymer Processing Engineering; Ministry of Education; South China University of Technology; Guangzhou China
- State Key Laboratory of Bioreactor Engineering; East China University of Science and Technology; Shanghai China
| |
Collapse
|