DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT

YANG Rong-jie; LI Xuan; YE Mei-ling; SHI Liang-he

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DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT

Research Article | 更新时间：2021-03-19

- DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT
- Acta Polymerica Sinica Issue 5, Pages: 572-576(1991)
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- Published：20 October 1991，
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YANG Rong-jie, LI Xuan, YE Mei-ling, SHI Liang-he. DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT. [J]. Acta Polymerica Sinica (5):572-576(1991)
DOI：

YANG Rong-jie, LI Xuan, YE Mei-ling, SHI Liang-he. DEGRADATION OF SBS TRIBLOCK COPOLYMER IN METHY- LETHYL KETONE SOLVENT. [J]. Acta Polymerica Sinica (5):572-576(1991) DOI：

摘要

论文研究了SBS三嵌段共聚物在选择性溶剂丁酮中的降解。采用超速离心沉降速度法、毛细管粘度法、GPC和IR的研究手段

证实了SBS/丁酮溶液存放时间较长时

溶液中SBS分子发生降解

降解发生在聚丁二烯嵌段的不饱和双键。从而也表明SBS/丁酮溶液中胶束行为的不稳定归国于SBS分子的降解。

Abstract

SBS molecules can micellize in methylethyl ketone (MEK) under certain conditions. But the behavior of micellization was found to be instable. In this paper

GPC

ultracentrifuga-tion and viscometry were used to study the instability. It was pointed out that SBS molecules were degradated in MEK solvent when solution was stored in air for a long time. The reason is that ketone is easy to yield free radicals by ultra-violet ray and the free radicals accelerate oxidation and degradation of double bond C=C of PB block in the SBS molecules.

关键词

SBS嵌段共聚物降解丁酮

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