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Cavitation behavior of polypropylene/polyethylene multilayer films during uniaxial tensile deformation: In-situ synchrotron X-ray study. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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2
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Consequences of thermo-oxidative ageing on the microstructure and mechanical properties of blends of polyethylenes with different butene contents. Polym Degrad Stab 2022. [DOI: 10.1016/j.polymdegradstab.2022.110121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Candau N, Chenal JM, Lame O, Schouwink P, Michaud V, Plummer CJ, Frauenrath H. Enhanced ductility in high performance polyamides due to strain-induced phase transitions. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Micro-Macro Scale Relationship in Creep Deformation of Ultra High Molecular Weight Polyethylene. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2628-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Ovalle C, Cloetens P, Proudhon H, Morgeneyer TF, Laiarinandrasana L. Nanocavitation mechanisms in deformed High Density PolyEthylene (HDPE) using synchrotron radiation NanoTomography. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Xu D, Wang H, Bin Y. Morphology transition of
micron‐thick
linear
low‐density
polyethylene films and the construction of nested spherulitic crystals via combinatorial methodology. POLYMER CRYSTALLIZATION 2021. [DOI: 10.1002/pcr2.10163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Duigong Xu
- Department of Polymer Science and Engineering Dalian University of Technology Dalian China
- Institute of Materials, China Academy of Engineering Physics Mianyang China
| | - Hai Wang
- Department of Polymer Science and Engineering Dalian University of Technology Dalian China
| | - Yuezhen Bin
- Department of Polymer Science and Engineering Dalian University of Technology Dalian China
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7
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Nagarajan S, Woo EM. Periodic Assembly of Polyethylene Spherulites Re-Investigated by Breakthrough Interior Dissection. Macromol Rapid Commun 2021; 42:e2000708. [PMID: 33656218 DOI: 10.1002/marc.202000708] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/10/2021] [Indexed: 11/12/2022]
Abstract
A completely novel 3D dissection approach is taken to re-investigate high-density polyethylene (HDPE) crystallized into periodic architectures in a wide range of Tc . This work first discovers that ring bands present in HDPE are crystallized in a quite wide Tc range (90-120 °C) all within regime-III growth. With further detailed analyses of the top-surface-relief patterns and 3D architectures of HDPE spherulites, this work has fully clarified the periodic morphology packed with alternate ways of single-crystal aggregates in correlation with the optical banding patterns. The proposed assembly mechanism sheds light that the periodic bands are actually composed of a cross-hatch grating structure in that the alternately perpendicular orientations from the ridge to valley bands being related to the interior radial to tangential lamellae. Such grating architectures in the interiors of HDPE can be viewed as a mimicry resembling shish-kebab lamellae self-aligned by Archimedean spiral-spins from the nucleus center.
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Affiliation(s)
- Selvaraj Nagarajan
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Eamor M Woo
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
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8
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The retardation effects of lamellar slip or/and chain slip on void initiation during uniaxial stretching of oriented iPP. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Candau N, Galland S, Cretenoud J, Balog S, Michaud V, Chenal JM, Lame O, Plummer CJG, Frauenrath H. High-performance polyamides with engineered disorder. Polym Chem 2021. [DOI: 10.1039/d1py01225h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Introducing molecular scale defects into semiaromatic polyamides by high-temperature melt compounding with aliphatic polyamides provides a simple means of tailoring the balance of microstructural order and disorder in these materials and achieving unusual property profiles.
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Affiliation(s)
- Nicolas Candau
- Laboratory of Macromolecular and Organic Materials (LMOM), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
- Laboratory for Processing of Advanced Composites (LPAC), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
- Centre Català del Plàstic (CCP), Universitat Politècnica de Catalunya (UPC), Barcelona Tech (EEBE-UPC), Av. D'Eduard Maristany, 16, 08019, Spain
| | - Sylvain Galland
- Laboratory of Macromolecular and Organic Materials (LMOM), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
- Laboratory for Processing of Advanced Composites (LPAC), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
| | - Julien Cretenoud
- Laboratory of Macromolecular and Organic Materials (LMOM), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
| | - Sandor Balog
- Adolphe Merkle Institute, University of Fribourg, Switzerland
| | - Véronique Michaud
- Laboratory for Processing of Advanced Composites (LPAC), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
| | - Jean-Marc Chenal
- University of Lyon, INSA de Lyon, MATEIS, CNRS, UMR 5510, 69621 Villeurbanne, France
| | - Olivier Lame
- University of Lyon, INSA de Lyon, MATEIS, CNRS, UMR 5510, 69621 Villeurbanne, France
| | - Christopher J. G. Plummer
- Laboratory of Macromolecular and Organic Materials (LMOM), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
| | - Holger Frauenrath
- Laboratory of Macromolecular and Organic Materials (LMOM), Institute of Materials (IMX), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 12, 1015 Lausanne, Switzerland
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10
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Chen Z, Wang Y, Xiong B, Zhu J. Initiation and growth of cavitation during the fatigue process of pre-oriented polypropylene film: In-situ SAXS study. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122832] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Polymorphic Transition of Pre-oriented Polybutene-1 under Tensile Deformation: In Situ FTIR Study. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2409-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Lin Y, Chen W, Meng L, Wang D, Li L. Recent advances in post-stretching processing of polymer films with in situ synchrotron radiation X-ray scattering. SOFT MATTER 2020; 16:3599-3612. [PMID: 32232297 DOI: 10.1039/c9sm02554e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The stretch-induced structural evolution mechanism is a long-standing scientific question in the post-stretching processing of polymer films. X-ray scattering, especially a combination of small- and wide-angle X-ray scattering (SAXS/WAXS), provides a powerful method to study the hierarchical structure of polymer films. Recent advances in synchrotron radiation (SR) light sources and detection techniques allow one to measure the structural evolution of polymer films during post-stretching processing in real time with ultrahigh time resolution, which benefits the understanding on this topic. This review summarizes some recent investigations on post-stretching processing of polymer films, which combine in situ X-ray scattering techniques with purposely designed tensile apparatus in terms of three aspects: uniaxial stretching, biaxial stretching and stretching with chemical reactions. Concerning the polymer bulk, traditional deformation mechanisms like stretch-induced crystallization (SIC), crystal slipping, phase transition and melting-recrystallization are discussed for the uniaxial and biaxial post-stretching of polymer films. New deformation models have been developed to focus on the structural evolution on the length scale of lamellar stacks, which consider the potential microphase separation of the interlamellar amorphous phase and microbuckling. For solution systems, the coupled effects of the mechanical work from external force and the chemical potential from possible chemical reactions are taken into account for the structural evolution during stretching in solution. Roadmaps of structural and morphological evolution in the processing parameter space (i.e., temperature, stress, strain and the concentration of additive in the bath solution) are eventually constructed for precursor films. The accumulation of a structural evolution database for post-stretching processing of polymer films can be expected to provide a helpful guide for industrial processing for high-performance polymers in the near future.
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Affiliation(s)
- Yuanfei Lin
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China. and South China Advanced Institute for Soft Matter Science and Technology, South China University of Technology, Guangzhou, China
| | - Wei Chen
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
| | - Lingpu Meng
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
| | - Daoliang Wang
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
| | - Liangbin Li
- National Synchrotron Radiation Laboratory, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
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13
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Bartczak Z, Vozniak A. Deformation Instabilities and Lamellae Fragmentation during Deformation of Cross-linked Polyethylene. Polymers (Basel) 2019; 11:E1954. [PMID: 31795116 PMCID: PMC6961083 DOI: 10.3390/polym11121954] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/26/2019] [Accepted: 11/26/2019] [Indexed: 11/25/2022] Open
Abstract
The effect of the topology of the amorphous phase and phase interconnectivity on the stability of the deformation of semicrystalline polyethylene was investigated. The chain topology was modified by crosslinking the samples with electron beam irradiation. The samples were deformed by plane-strain compression, while the accompanying structural changes were monitored with X-ray and differential scanning calorimetry (DSC). At the true strain around of e = 0.3, the lamellar stacks parallel to the loading direction experienced microbuckling instability, which shortly led to the cooperative kinking of lamellae. Macroscopically, this showed up as the 'second yield.' Buckling is driven by the different stiffness levels of the hard and soft layers and their strong connectivity-for given layer thickness, the critical strain for buckling appeared proportional to the stiffness of the amorphous phase. Above e = 1.0, lamellae fragmentation was observed. This resulted from the localization of crystallographic slip, which was triggered by stress concentrations generated at lamellae faces by taut 'stress transmitter' (ST) chains. Accordingly, the fragmentation was found to be dependent on the surface fraction of STs at the amorphous-crystal interface: a low concentration of STs resulted in fewer but stronger stress concentrations, which led to earlier slip localization, followed quickly by lamellae fragmentation. The observed instabilities, either lamellae kinking or fragmentation, profoundly influenced the deformation process as well as the resultant structure. Both phenomena relieved much of the structural constraints imposed on deforming lamellae and make further strain accommodation easier.
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Affiliation(s)
- Zbigniew Bartczak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland;
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14
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Kang J, Chen D, Xiong B, Zheng N, Yang F, Xiang M, Zheng Z. Facile Route for the Fabrication of Polypropylene Separators for Lithium-Ion Batteries with High Elongation and Strong Puncture Resistance. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b05262] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jian Kang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Dandan Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Bijin Xiong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Nan Zheng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Feng Yang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Ming Xiang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Zhuo Zheng
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
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15
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Stress Heterogeneity Leading to Void Nucleation within Spherulites for Semi-Crystalline Polymers. CRYSTALS 2019. [DOI: 10.3390/cryst9060298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Linking the microstructure to the mechanical properties is a key feature in the design and assessment of the durability of semi-crystalline polymers. This paper addresses the importance of a particular architecture inside spherulites. The use of the theoretical tools of continuum mechanics has been combined with experimental observations of the deformation of the microstructure. Microstructural heterogeneities at various scales induced critical regions in the spherulite where voiding has been reported. The local stress state has been investigated using a Finite Element code. A simple Hooke’s law was used for meshes accounting for the alternating crystalline and amorphous lamellae. This allowed a better understanding of the loci of void nucleation in the equatorial region, as well as in the “polar fans”, and were explained by using a criterion based on stress equi-triaxiality.
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16
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Understanding structure-mechanics relationship of high density polyethylene based on stress induced lattice distortion. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.11.054] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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