Citation: LI Guizhi, SHI Lianghe, YE Meiling. EFFECT OF POLYMERIZATION CONDITIONS ON THE LADDERLIKE STRUCTURE OF POLYPHENYLSILSESQUIOXANE[J]. Chinese Journal of Polymer Science, ;1996, 14(1): 41-47. shu

EFFECT OF POLYMERIZATION CONDITIONS ON THE LADDERLIKE STRUCTURE OF POLYPHENYLSILSESQUIOXANE

LI Guizhi ^{**，施良和} ,
SHI Lianghe ,
YE Meiling

Received Date: 11 September 1994

The ladderlike structure of PPSQ synthesized by using four kinds of catalysts (MgF2,LiF, KOH and DCC) at different polymerization conditions has been investigated by IRand NMR. In the system using MgF2 as the main catalyst, the most important factorwhich affects the ladderlike structure of PPSQ is the composition of the dual catalysts,MgF2 and DCC. PPSQ prepared by using KOH as the catalyst has the highest regularityof ladderlike structure among all samples. PPSQ with different degree of ladder regularity can be obtained by choice of polymerization conditions.
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