Anionic polymerization of 1,3,5-tris(trifluoropropylmethyl)cyclotrisiloxane (F3) in miniemulsion

被引：64

作者：

Barrère, M ^{[1
]}

Maitre, C ^{[1
]}

Dourges, MA ^{[1
]}

Hémery, P ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, UMR 7610, Lab Chim Polymeres, F-75252 Paris 05, France

来源：

MACROMOLECULES | 2001年 / 34卷 / 21期

关键词：

D O I：

10.1021/ma010559z

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The synthesis of poly(trifluoropropylmethyl)siloxane (PTFPMS) by anionic ring-opening polymerization of 1,3,5-tris(trifluoropropylmethyl)cyclotrisiloxane (F-3) was studied in miniemulsion using didodecyldimethylammonium bromide (DDDBr) as emulsifier and sodium hydroxide as initiator. This new process of polymerization produced well-defined alpha,omega -dihydroxylated polymer in very high yields and with molar masses ranging from 2000 to 30 000 g mol(-1). A kinetic study showed that polymerization occurs in two stages. During the first stage, which corresponds to the anionic kinetically controlled ring-opening polymerization of F-3, the maximum nonequilibrium yield is close to 100%. The second stage involves condensation and backbiting reactions. The delay between these steps offers a broad "termination window" for achieving high polymer yield.

引用

页码：7276 / 7280

页数：5

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