Thiol-ene photopolymerization of polymer-derived ceramic precursors

被引：34

作者：

Cramer, NB

Reddy, SK

Lu, H

Cross, T

Raj, R

Bowman, CN

机构：

[1] Univ Colorado, Dept Chem & Biol Engn, Ctr Engn, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[3] Univ Colorado, Hlth Sci Ctr, Dept Restorat Dent, Denver, CO 80045 USA

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2004年 / 42卷 / 07期

关键词：

kinetics (polym.); photopolymerization; step-growth polymerization;

D O I：

10.1002/pola.20010

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 liquid, ceramic precursor monomer VL20 was copolymerized with a thiol monomer in a traditional radical thiol-ene photopolymerization. Polymerization occurred via addition of the thiol functional group to the vinyl silazane functional group in a 1:1 ratio consistent with a step-growth polymerization. Gelation occurred at a high conversion of functional groups (70%) consistent with an average molecular weight and functionality of 560 and 1.7, respectively, for VL20 monomers. Initiatorless photopolymerization of the thiol-VL20 system also occurred upon irradiation at either 365 or 254 nm. (C) 2004 Wiley Periodicals, Inc.

引用

页码：1752 / 1757

页数：6

共 25 条

[1] Using changes in initiation and chain transfer rates to probe the kinetics of cross-linking photopolymerizations: Effects of chain length dependent termination [J].