UV Cure for Multi Thiol-Vinyl Silizane and Pyrolysis

Chem. J. Chinese Universities

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UV Cure for Multi Thiol-Vinyl Silizane and Pyrolysis

SONG Jia-Le, CHEN Li-Xin*, WANG Ya-Zhou, WANG Ru-Min

Key Laboratory of Applied Physics and Chemistry in Space of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, China

Received:2007-04-25 Revised:1900-01-01 Online:2007-09-10 Published:2007-09-10
Contact: CHEN Li-Xin

Abstract

Abstract: Si₃N₄ ceramic was prepared with pyrolyzing ceramic precursor of UV cured multi thiol-vinyl silizane. The results of in-suit FTIR show that thiol-vinyl silizane curing system was polymerized rapidly with a little photoinitiator. The photopolymerization rate was promoted, but the final vinyl bond conversion was depressed with enhancing the functionality of thiol group. The results of DMA and TGA show that T_g of the copolymer films of thiol-vinyl silizan cured by UV was elevated, however, the maxiumu rate of mass loss was decreased with increasing the functionality of thiol group. The ceramic yield was determined by the composition of copolymer and was independent of the thiol functionality. A majority of Si₃N₄ microcrystalline was obtained after pyrolyzing at 1400 ℃ for 15 h in N₂ atmosphere.

Key words: Polymer ceramic precursor, Thiol-vinyl, Silizane, UV curing, Pyrolysis

CLC Number:

O631

TrendMD:

SONG Jia-Le, CHEN Li-Xin*, WANG Ya-Zhou, WANG Ru-Min. UV Cure for Multi Thiol-Vinyl Silizane and Pyrolysis[J]. Chem. J. Chinese Universities, doi: .

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UV Cure for Multi Thiol-Vinyl Silizane and Pyrolysis

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