Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by <italic style="font-style: italic">In Situ</italic> Synchrotron Radiation X-ray Scattering

Pin-Zhang Chen; Hao-Yuan Zhao; Zhi-Jie Xia; Qian-Lei Zhang; Dao-Liang Wang; Ling-Pu Meng; Wei Chen

doi:10.1007/s10118-020-2458-y

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Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering

ARTICLE | Updated：2020-07-08

- Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering
- Chinese Journal of Polymer Science Vol. 39, Issue 1, Pages: 102-112(2021)
- Affiliations：
  
  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 230029, China
- Author bio：
  
  wc003@ustc.edu.cn
- Funds：
- DOI：10.1007/s10118-020-2458-y
  CLC：
- Received：31 March 2020，
  
  Revised：2020-5-3，
  
  Accepted：15 May 2020，
  
  Online First：08 July 2020，
  
  Published：01 January 2021
- Accepted：
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Chen, P. Z.; Zhao, H. Y.; Xia, Z. J.; Zhang, Q. L.; Wang, D. L.; Meng, L. P.; Chen, W. Structural evolution of LLDPE-LMW/HMW blend during uniaxial deformation as revealed by , in situ, synchrotron radiation X-ray scattering. Chinese J. Polym. Sci. 2021, 39, 102–112

Pin-Zhang Chen, Hao-Yuan Zhao, Zhi-Jie Xia, et al. Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering[J]. Chinese Journal of Polymer Science, 2021, 39(1): 102-112. DOI: 10.1007/s10118-020-2458-y.
Chen, P. Z.; Zhao, H. Y.; Xia, Z. J.; Zhang, Q. L.; Wang, D. L.; Meng, L. P.; Chen, W. Structural evolution of LLDPE-LMW/HMW blend during uniaxial deformation as revealed by , in situ, synchrotron radiation X-ray scattering. Chinese J. Polym. Sci. 2021, 39, 102–112 DOI： 10.1007/s10118-020-2458-y.

Pin-Zhang Chen, Hao-Yuan Zhao, Zhi-Jie Xia, et al. Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering[J]. Chinese Journal of Polymer Science, 2021, 39(1): 102-112. DOI: 10.1007/s10118-020-2458-y. DOI：

摘要

Abstract

The structural evolutions of LLDPE-LMW/HMW blend during uniaxial deformation at temperatures of 80 and 120 °C were investigated by the

in situ

synchrotron radiation small- and wide-angle X-ray scattering (SR-SAXS/WAXS). The magic sandwich echo (MSE) sequence was used to detect a virtually dead-time-free induction decay (FID) for solid-state NMR analysis. The thermal property of the blend was first checked by DSC

and the temperature dependence of the overall crystallinity was obtained by MSE-FID. The onset melting temperature is determined to be 116 °C (DSC)

and the enhanced

-flip motions in the crystalline domains are clearly observed at

60 °C by MSE-FID. For deformation at 80 °C

the lamellae become staggered in the strain-softening region as shown by the four-point SAXS pattern

whereas further deformation leads to the melting-recrystallization in the strain-hardening region. For deformation at 120 °C

the six-point SR-SAXS signal appears just after the four-point SR-SAXS signal

which indicates the formation of new lamellae along deformation direction. In addition

no phase transition occurs in the whole deformation process at both temperatures. Current work shows the detailed temperature dependence microstructural evolution of LLDPE-LMW/HMW blend. This is expected to provide more structural information for correlating microscopic structure with macroscopic mechanical performance.

关键词

Keywords

references

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Structural Evolution of LLDPE-LMW/HMW Blend during Uniaxial Deformation as Revealed by In Situ Synchrotron Radiation X-ray Scattering

DOI：10.1007/s10118-020-2458-y

摘要

Abstract

关键词

Keywords

references