DIRECT MEASUREMENT OF THE TEMPERATURE-DEPENDENCE OF THE UNPERTURBED DIMENSIONS OF A POLYMER

被引：56

作者：

BOOTHROYD, AT

RENNIE, AR

BOOTHROYD, CB

机构：

[1] UNIV BRISTOL,SCH CHEM,BRISTOL BS8 1TS,AVON,ENGLAND

[2] UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE CB2 3QZ,ENGLAND

来源：

EUROPHYSICS LETTERS | 1991年 / 15卷 / 07期

关键词：

MACROMOLECULES AND POLYMER MOLECULES; NEUTRON SCATTERING TECHNIQUES (INC SMALL-ANGLE SCATTERING); MACROMOLECULAR AND POLYMER SOLUTIONS (SOLUBILITY; SWELLING; ETC); POLYMER MELTS;

D O I：

10.1209/0295-5075/15/7/004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate for the first time that small-angle neutron scattering can be used as a direct and accurate method to determine the temperature dependence of the unperturbed dimensions of a polymer. The sensitivity of the technique arises from the remarkable accuracy with which the random walk model can be used to describe the single-chain structure factor, and enables us to detect changes in the polymer radius of gyration of less than 0.5%. We present results for molten polyethylene and verify the accepted value of the temperature coefficient of thermal expansion.

引用

页码：715 / 719

页数：5

共 17 条

[1] CONFORMATIONAL ENERGIES OF N-ALKANES AND RANDOM CONFIGURATION OF HIGHER HOMOLOGS INCLUDING POLYMETHYLENE [J].