A novel and facile method for direct synthesis of cross-linked polysiloxanes by anionic ring-opening copolymerization with Ph12-POSS/D4/Ph8D4

被引：20

作者：

Li, HY ^{[1
]}

Yu, DS ^{[1
]}

Zhang, JY ^{[1
]}

机构：

[1] Beijing Univ Chem Technol, Coll Mat Sci & Engn, Beijing 100029, Peoples R China

来源：

POLYMER | 2005年 / 46卷 / 14期

关键词：

POSS; cross-linked polysiloxane; anionic ring-opening copolymerization;

D O I：

10.1016/j.polymer.2005.04.028

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 cross-linked polysiloxanes were directly synthesized by anionic ring-opening copolymerization of Ph-12-POSS as multifunctional monomer with D-4 and Ph8D4 under KOH or Me4NOH siloxanolate. And the influences of the polar additive DMAc on gelation time were investigated. The results of gel content and swelling ratio, GPC, solid-state Si-29 and C-13 NMR, FT-IR, WAXD showed that Ph-12-POSS was reacted and most of the product was cross-linked. The DSC and TG results indicated that the cross-linked polysiloxanes exhibited distinct glass transition temperatures (T-g) and excellent thermal stability. Compared to that with KOH siloxanolate, the cross-linked polysiloxane synthesized with Me4NOH siloxanolate has more preferable thermal stability. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：5317 / 5323

页数：7

共 29 条

[1]

AGNIESZKA G, 2004, J ORGANOMET CHEM, V689, P705

[2]

ALAN JW, 2003, CHEM MATER, V15, P4555

[3] Polysiloxanes in macromolecular architecture [J].

Bischoff, R ;

Cray, SE .

PROGRESS IN POLYMER SCIENCE, 1999, 24 (02) :185-219

[4]

BRANDRUP J, 1999, POLYM HDB, P231

[5] Synthesis of terminal Si-H irregular tetra-branched star polysiloxanes. Pt-catalyzed hydrosilylation with unsaturated epoxides. Polysiloxane films by photo-acid catalyzed crosslinking [J].

Cai, GP ;

Weber, WP .

POLYMER, 2004, 45 (09) :2941-2948

[6] Characterisation and oxidative degradation of a room-temperature vulcanised poly(dimethylsiloxane) rubber [J].

Chaudhry, AN ;

Billingham, NC .

POLYMER DEGRADATION AND STABILITY, 2001, 73 (03) :505-510

[7] Kinetic aspects of the thermal degradation of poly(dimethyl siloxane) and poly(dimethyl diphenyl siloxane) [J].

Deshpande, G ;

Rezac, ME .

POLYMER DEGRADATION AND STABILITY, 2002, 76 (01) :17-24

[8]

EUGENE GR, 1987, SILICON SILICONES, P94

[9] Practical methods for synthesizing four incompletely condensed silsesquioxanes from a single R8Si8O12 framework [J].

Feher, FJ ;

Soulivong, D ;

Nguyen, F .

CHEMICAL COMMUNICATIONS, 1998, (12) :1279-1280

[10] Facile framework cleavage reactions of a completely condensed silsesquioxane framework [J].

Feher, FJ ;

Soulivong, D ;

Lewis, GT .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1997, 119 (46) :11323-11324

← 1 2 3 →