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On the cryogenic “degradation” of polystyrene in dilute solution

 

作者: Song Wang,   Xiaohu Yan,   Jianfu Ding,   Mingzhu Liu,   Rongshi Cheng,   Chi Wu,   Renyuan Qian,  

 

期刊: Journal of Macromolecular Science, Part B  （Taylor Available online 1997）
卷期: Volume 36, issue 2  

页码: 187-194

 

ISSN:0022-2348

 

年代: 1997

 

DOI:10.1080/00222349708220424

 

出版商: Taylor & Francis Group

 

关键词: Cryogenic degradation;Intrachain cohesional entanglement

 

数据来源: Taylor

 

摘要:

The effect of cryogenic treatment on dilute polystyrene solutions of different thermal history was studied by viscometry, size-exclusion chromatography, and static laser light-scattering measurements. The lowering of apparent molar mass during freezing of the solvent has its origin in a more compact conformation of the polymer chain resulting from the formation of intrachain segmental cohesion. Prior hypotheses about cryogenic degradation or chain scission in the polymer solution are incorrect.

 

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