通过弹性光散射法研究了聚苯乙烯-聚异戊二烯-聚苯乙烯(SIS)在正己烷溶液中的自组装行为.结果表明,光散射强度峰值随聚合物浓度的变化呈先增加后降低再增加的趋势,从80℃降温到30℃的过程中,有效粒径从30.1 nm增加到943.4 nm,SIS分子链在溶液中表现出不同的聚集态,光照下溶液会产生不同的光散射信号,由此分析了SIS的相分离机制,为深入研究嵌段聚合物的相分离机制提供了新思路.%This paper reported an investigation on the self-assembly behavior of styrene-isoprene-styrene triblock copolymer(SIS) in an n-hexane solvent by an elastic light scattering method.The results indicated that the peak light scattering intensity showed a concave trend with a variation of temperature,and the effective grain diameter increased from 30.1 nm to 943.4 nm with a decrease of temperature.The molecular chains of SIS presented different aggregation states in the solution at different temperature.The light scattering signal was related to the aggregation of SIS and therefore can be used to analyze the phase separation mechanism of SIS.This article provides a new method for the study of phase separation mechanism of block polymers.
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