Scaling behavior of pregel sols obtained by end-linking of linear chains
Scaling behavior of pregel sols obtained by end-linking of linear chains
复制标题
通过线性链末端连接获得的预凝胶溶胶的结垢行为
DOI：
10.1021/ma00196a064
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发表时间：
1989
期刊：
影响因子：
5.5
通讯作者：
C. Strazielle
中科院分区：
文献类型：
--
作者：
A. Lapp;L. Leibler;F. Schosseler;C. Strazielle
到目前为止，用这种技术研究了两种不同的凝胶反应：在条件8,9下辐照诱导的线性聚苯乙烯（PS）溶液的随机交联和导致聚酯网络的大块缩聚聚合。虽然这两种体系有很大的不同，但它们在凝胶点之前的溶胶相的表征给出了相似的结果。在这两种情况下，实验分布函数都服从标度形式。表征SDF在凝胶点衰减的指数r的值也很好地吻合。本文的目的是描述用SEC技术在第三种不同体系上获得的初步结果：熔体中聚二甲基硅氧烷（PDMS）链的末端连接。结果如下所示
Up to now, two different gelling reactionshave been investigated with this technique: irradiation-induced random cross-linking of linear polystyrene (PS) solutions in conditions8, 9 and bulk condensation polymerization leading to a polyester network. 10 Although the two systems are quite different, the characterization of their sol phase before the gel point gave similar results. In both cases the experimental distribution functions are found to obey a scaling form. Also the values of the exponent r, that characterizes the decay of the SDF at the gel point, are in good agreement with each other. The purpose of this note is todescribe preliminary re-sults obtained with the SEC technique on a third and different system: end-linking of poly (dimethylsiloxane)(PDMS) chains in the melt. The results are shown tobe