Analysis of Small-Angle Neutron Scattering Spectra from Deformed Polymers with the Spherical Harmonic Expansion Method and a Network Model

被引：13

作者：

Wang, Zhi-Yuan ^{[1
,2
]}

Kong, Dejia ^{[1
,2
]}

Yang, Lincan ^{[3
]}

Ma, Hongwei ^{[3
]}

Su, Fengmei ^{[4
]}

Ito, Kanae ^{[5
]}

Liu, Yun ^{[5
]}

Wang, Xuewu ^{[1
,2
]}

Wang, Zhe ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Minist Educ, Dept Engn Phys, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Minist Educ, Key Lab Particle & Radiat Imaging, Beijing 100084, Peoples R China

[3] Dalian Univ Technol, Sch Chem Engn, Dept Polymer Sci & Engn, Dalian 116024, Liaoning, Peoples R China

[4] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Key Lab Adv Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Henan, Peoples R China

[5] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

MACROMOLECULES | 2018年 / 51卷 / 21期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

LENGTH-SCALE DEPENDENCE; TOPOLOGICAL CONSTRAINTS; SANS INVESTIGATIONS; RELAXATION; DYNAMICS; TIME; VISCOELASTICITY; STRESS; CHAINS; STRAIN;

D O I：

10.1021/acs.macromol.8b01913

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We combine the recently proposed spherical harmonic expansion (SHE) method [Phys. Rev. X 2017, 7, 031003] with a modified network model to analyze the small angle neutron scattering (SANS) spectra from deformed entangled polymers. Focusing on the leading anisotropic component and the isotropic component in the SHE, the analysis gives a reliable value of the stretch ratio of the end-to end vector, and a reasonable estimation of the radius of gyration, of a single chain in polymers undergoing uniaxial deformation and relaxation. Moreover, it provides a practical way to evaluate the stress of deformed entangled polymers with the SANS spectra from a viewpoint of rubber elasticity.

引用

页码：9011 / 9018

页数：8

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