VISCOELASTIC BEHAVIOR OF A HOMOGENEOUS POLYSTYRENE-BLOCK-POLYISOPRENE-BLOCK-POLYSTYRENE COPOLYMER

被引：16
|
作者：
HAN, CD
BAEK, DM
KIM, JK
HASHIMOTO, T
OKAMOTO, S
机构：
[1] KYOTO UNIV,FAC ENGN,DEPT POLYMER CHEM,KYOTO 606,JAPAN
[2] POLYTECH INST NEW YORK,DEPT CHEM ENGN,BROOKLYN,NY 11201
来源：
MACROMOLECULES | 1991年 / 24卷 / 19期
关键词：
D O I：
10.1021/ma00019a031
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A polystyrene-block-polyisoprene-block-polystyrene (SIS) copolymer having block molecular weights of 3900S-93300I-3900S was synthesized via anionic polymerization, and its linear dynamic viscoelastic properties (dynamic storage and loss moduli, G'(omega) and G"(omega), as functions of angular frequency omega) were measured at various temperatures, using a cone-and-plate rheometer. Plots of log G' versus log G" were found to be independent of temperature in the range from 50 to 150-degrees-C, leading us to conclude that the block copolymer had no microdomain structure at T greater-than-or-equal-to 50-degrees-C. Independent study by small-angle X-ray scattering confirmed that the SIS block copolymer indeed had no microdomain structure (i.e., homogeneous) at T greater-than-or-equal-to 30-degrees-C.
引用
收藏
页码：5408 / 5413
页数：6
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