MICROPHASE SEPARATION OF A SYMMETRICAL POLY(STYRENE-B-PARAMETHYLSTYRENE) DIBLOCK COPOLYMER

被引：25

作者：

BARTELS, VT ^{[1
]}

ABETZ, V ^{[1
]}

MORTENSEN, K ^{[1
]}

STAMM, M ^{[1
]}

机构：

[1] RISO NATL LAB,DK-4000 ROSKILDE,DENMARK

来源：

EUROPHYSICS LETTERS | 1994年 / 27卷 / 05期

关键词：

D O I：

10.1209/0295-5075/27/5/007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The microphase separation in a symmetric diblock copolymer consisting of polystyrene and polyparamethylstyrene has been studied by small-angle neutron scattering. The observed peak changes with temperature in intensity, shape and position. The peak position shifts at the microphase separation transition temperature T(MST) by approximately 7%. Also from a peak intensity analysis we determine T(MST) at approximately 180-degrees-C. The shape of the peak change at T(MST) and the indication of a second-order peak is observed, characteristic of a lamellar phase in the ordered regime. Intensity does not vanish for q --> 0, but has a temperature-dependent level. Results are discussed with respect to recent computer simulations and theoretical approaches. A simple mean-field picture is not consistent with the data.

引用

页码：371 / 376

页数：6

共 33 条

[1] GAUSSIAN-COIL TO STRETCHED-COIL TRANSITION IN BLOCK COPOLYMER MELTS [J].