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化工学报  2013 

TG-siloxane改性BPFER/mXDA体系固化反应动力学与热性能

DOI: 10.3969/j.issn.0438-1157.2013.06.025, PP. 2080-2085

Keywords: 固化反应动力学,差示扫描量热法,耐热性,双酚F环氧树脂,有机硅改性剂

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Abstract:

以1,3-二氨丙基-1,1,3,3-四甲基二硅氧烷(DSX)和环氧氯丙烷(ECH)为原料,利用相转移催化剂,合成双酚F环氧树脂(BPFER)改性剂N,N,N',N'-四缩水甘油基-1,3-二氨丙基-1,1,3,3-四甲基二硅氧烷(TG-siloxane),并用FTIR、13CNMR谱图对其结构进行了表征。对TG-siloxane改性BPFER/mXDA(间苯二甲胺)体系的固化动力学进行了研究。根据DSC曲线和Starink方程,得该体系表观固化活化能为51.52kJ·mol-1。用?esták-Berggren模型求得不同升温速率下的表观因子、反应级数。动力学方程表明,升温速率对固化反应影响明显;所得方程用于预估反应进程时,与实测值吻合程度高。TG分析表明,TG-siloxane改性BPFER/mXDA体系固化物的耐热性能优于单纯BPFER/mXDA固化物。

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