Studies on Curing Reaction Kinetics of Liquid Polycarbosilane

Lin-hao WANG; Yong-ming LUO; Cai-hong XU; Xi-xin WANG

doi:10.14028/j.cnki.1003-3726.2016.09.013

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Studies on Curing Reaction Kinetics of Liquid Polycarbosilane

Special Issue for Celebrating 60th Anniversary of ICCAS | 更新时间：2022-09-12

- Studies on Curing Reaction Kinetics of Liquid Polycarbosilane
- Polymer Bulletin Vol. 29, Issue 9, Pages: 149-155(2016)
- 作者机构：
  
  1.河北工业大学材料科学与工程学院，天津 300130
  2.中国科学院化学研究所高技术材料实验室，北京 100190
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2016.09.013
  CLC：
- Published：20 September 2016，
  
  Received：09 May 2016，
  
  Revised：27 June 2016，
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Lin-hao WANG, Yong-ming LUO, Cai-hong XU, Xi-xin WANG. Studies on Curing Reaction Kinetics of Liquid Polycarbosilane. [J]. Polymer Bulletin 29(9):149-155(2016)
DOI：

Lin-hao WANG, Yong-ming LUO, Cai-hong XU, Xi-xin WANG. Studies on Curing Reaction Kinetics of Liquid Polycarbosilane. [J]. Polymer Bulletin 29(9):149-155(2016) DOI： 10.14028/j.cnki.1003-3726.2016.09.013.

摘要

选用过氧化二异丙苯(DCP)和偶氮二异丁腈（AIBN)分别引发含乙烯基液态聚碳硅烷（VHPCS)聚合。采用非等温差示扫描量热法(DSC)研究VHPCS/DCP、VHPCS/AIBN两种体系的固化反应动力学，通过Kissinger方程和Crane方程确定相关动力学参数，并由此得出体系的

级固化模型。同时通过

-T外推法确定体系的固化工艺温度，并对体系交联机理及产物热性能进行分析。研究结果表明：VHPCS/DCP、VHPCS/ AIBN 二体系的活化能分别为72. 17kJ/mol、94. 11kJ/mol，反应级数分别为0. 92、0. 93。

-T外推法确定：当升温速率为0 ℃ /min时二体系的近似凝胶化温度均为55 ℃，峰值温度分别为110℃、107℃ ，终止温度分别为129. 5℃、134℃。FTIR结果表明，VHPCS的交联固化主要是通过双键的自聚合实现，交联后样品的陶瓷产率有所提高。

Abstract

In this paper

dicumyl peroxide(DCP)and azobisisobutyronitrile(AIBN)were used to initiate polymerization of liquid vinylpolycarbosilane( VHPCS). The curing reaction kinetics of VHPCS/AIBN

VHPCS/DCP systems were studied by non-isothermal differential scanning calorimetry (DSC). The related kinetic parameters were analyzed by Kissinger equation and Crane equation

and the nth-order curing models of both systems were obtained based on these curing kinetic parameters. The curing process temperatures of two systems were determined by the

-T extrapolation method. In addition

the cross-linking mechanism of VHPCS and the thermal property of cross-linked products were also studied. The results showed that the activation energy E of VHPCS/AIBN

VHPCS/DCP systems were 72. 17 KJ/mol

94. 11 KJ/mol

and the reaction order

were 0. 92

0. 93

respectively. The characteristic temperatures of VHPCS/AIBN

VHPCS/DCP systems were approximate gelling temperature of 55℃

peak temperature of 110℃

107℃

termination temperature of 129. 5℃

134℃

respectively. FTIR result indicated that the cross-linking of VHPCS mainly by self-polymerization of vinyl group. The mass residue of cross-linked products were higher than that of VHPCS.

关键词

聚碳硅烷引发剂DSC反应动力学固化工艺

Keywords

VHPCSInitiatorDSCReaction kineticsCuring process

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