COLLOIDAL NATURE OF STAR POLYMER DILUTE AND SEMIDILUTE SOLUTIONS

被引：132

作者：

DOZIER, WD ^{[1
]}

HUANG, JS ^{[1
]}

FETTERS, LJ ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,CORP RES LAB,ANNANDALE,NJ 08801

来源：

MACROMOLECULES | 1991年 / 24卷 / 10期

关键词：

D O I：

10.1021/ma00010a026

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The structure of dilute and semidilute solutions of 8-, 12-, and 18-arm star-branched polyisoprenes and 12-arm polystyrenes in good solvent conditions was studied by small-angle neutron scattering (SANS). Interparticle interactions influence the low-angle scattering at concentrations well below the overlap concentration, c*. We have found in the semidilute solutions evidence for interparticle repulsion and a corresponding depression in the structure factor S(q) at low q. A function for fitting the scattering data from stars is introduced which allows a precise determination of the radius of gyration even at concentrations that are a finite fraction of c*. The method was also used to fit results from computer simulations and its usefulness compared to the commonly used Kratky plot method.

引用

页码：2810 / 2814

页数：5

共 32 条

[1] THERMODYNAMIC PROPERTIES OF STAR POLYMERS - GOOD SOLVENTS [J].