Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation

Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation

The microstructural origin of the double yield points of metallocene linear low-density polyethylene (mLLDPE) precursor films has been studied with the assistance of the synchrotron radiation small- and wide-angle X-ray scattering (SAXS/WAXS). It has been shown that the microstructural origin of the...

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Main Authors: Obaid Iqbal, Jean Claude Habumugisha, Shengyao Feng, Yuanfei Lin, Wei Chen, Wancheng Yu, and Liangbin Li
Format: Article
Language:English
Published: MDPI AG 2021-12-01
Series:Polymers
Subjects:
mLLDPE
double yield points
<i>in situ</i> SAXS/WAXS
Online Access:https://www.mdpi.com/2073-4360/13/1/126
id doaj-66743782b5b242d68611712a3998d1c3
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spelling doaj-66743782b5b242d68611712a3998d1c32020-12-31T00:05:04ZengMDPI AGPolymers2073-43602021-12-011312612610.3390/polym13010126Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile DeformationObaid Iqbal0Jean Claude Habumugisha1Shengyao Feng2Yuanfei Lin3Wei Chen4Wancheng Yu5and Liangbin Li6National 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 230026, ChinaNational 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 230026, ChinaNational 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 230026, ChinaNational 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 230026, ChinaNational 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 230026, ChinaNational 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 230026, ChinaNational 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 230026, ChinaThe microstructural origin of the double yield points of metallocene linear low-density polyethylene (mLLDPE) precursor films has been studied with the assistance of the synchrotron radiation small- and wide-angle X-ray scattering (SAXS/WAXS). It has been shown that the microstructural origin of the double yield points is highly related to the initial orientation of the original precursor film. For less oriented mLLDPE precursor films, the rearrangement of lamellae and the appearance of the monoclinic phase are the microstructural origins of the first yield point. In comparison, for the highly-oriented mLLDPE precursor film, only the orthorhombic-monoclinic phase transition appears at the first yield point. The melting-recrystallization and the formation of the fibrillary structure happen beyond the second yield point for all studied mLLDPE precursor films. Finally, the detailed microstructural evolution roadmaps of mLLDPE precursor films under uniaxial tensile deformation have been established, which might serve as a guide for processing high-performance polymer films by post-stretching.https://www.mdpi.com/2073-4360/13/1/126mLLDPEdouble yield points<i>in situ</i> SAXS/WAXS
collection DOAJ
language English
format Article
sources DOAJ
author Obaid Iqbal
Jean Claude Habumugisha
Shengyao Feng
Yuanfei Lin
Wei Chen
Wancheng Yu
and Liangbin Li
spellingShingle Obaid Iqbal
Jean Claude Habumugisha
Shengyao Feng
Yuanfei Lin
Wei Chen
Wancheng Yu
and Liangbin Li
Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
Polymers
mLLDPE
double yield points
<i>in situ</i> SAXS/WAXS
author_facet Obaid Iqbal
Jean Claude Habumugisha
Shengyao Feng
Yuanfei Lin
Wei Chen
Wancheng Yu
and Liangbin Li
author_sort Obaid Iqbal
title Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
title_short Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
title_full Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
title_fullStr Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
title_full_unstemmed Microstructural Origin of the Double Yield Points of the Metallocene Linear Low-Density Polyethylene (mLLDPE) Precursor Film under Uniaxial Tensile Deformation
title_sort microstructural origin of the double yield points of the metallocene linear low-density polyethylene (mlldpe) precursor film under uniaxial tensile deformation
publisher MDPI AG
series Polymers
issn 2073-4360
publishDate 2021-12-01
description The microstructural origin of the double yield points of metallocene linear low-density polyethylene (mLLDPE) precursor films has been studied with the assistance of the synchrotron radiation small- and wide-angle X-ray scattering (SAXS/WAXS). It has been shown that the microstructural origin of the double yield points is highly related to the initial orientation of the original precursor film. For less oriented mLLDPE precursor films, the rearrangement of lamellae and the appearance of the monoclinic phase are the microstructural origins of the first yield point. In comparison, for the highly-oriented mLLDPE precursor film, only the orthorhombic-monoclinic phase transition appears at the first yield point. The melting-recrystallization and the formation of the fibrillary structure happen beyond the second yield point for all studied mLLDPE precursor films. Finally, the detailed microstructural evolution roadmaps of mLLDPE precursor films under uniaxial tensile deformation have been established, which might serve as a guide for processing high-performance polymer films by post-stretching.
topic mLLDPE
double yield points
<i>in situ</i> SAXS/WAXS
url https://www.mdpi.com/2073-4360/13/1/126
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AT jeanclaudehabumugisha microstructuraloriginofthedoubleyieldpointsofthemetallocenelinearlowdensitypolyethylenemlldpeprecursorfilmunderuniaxialtensiledeformation
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AT wanchengyu microstructuraloriginofthedoubleyieldpointsofthemetallocenelinearlowdensitypolyethylenemlldpeprecursorfilmunderuniaxialtensiledeformation
AT andliangbinli microstructuraloriginofthedoubleyieldpointsofthemetallocenelinearlowdensitypolyethylenemlldpeprecursorfilmunderuniaxialtensiledeformation
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