On the cryogenic “degradation” of polystyrene in dilute solution
On the cryogenic “degradation” of polystyrene in dilute solution
复制标题
聚苯乙烯在稀溶液中的低温“降解”
DOI：
10.1080/00222349708220424
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Ren
中科院分区：
文献类型：
--
作者：
Song Wang;Xiao;Jianfu Ding;Mingzhu Liu;R. Cheng;Chi Wu;Ren
用粘度计、尺寸排斥层析和静态激光光散射法研究了深冷处理对不同热历史的聚苯乙烯稀溶液的影响。溶剂冻结过程中表观摩尔质量的降低源于链内链段内聚合体形成的高分子链的更紧密的构象。先前关于聚合物溶液中低温降解或链断裂的假设是不正确的。
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.