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采用非等温DSC方法研究了不同升温速率下热致性液晶聚合物(TLCP)/酚醛树脂(PF)复合体系的固化行为,利用3种现象学模型(Ozawa及Kissinger简单模型、Kissinger-Akahira-Sunose(KAS)等转化模型)分析对比了TLCP/PF复合体系及纯PF体系的固化反应动力学,研究TLCP含量对TLCP/PF复合体系固化反应动力学的影响。结果表明,采用Ozawa和Kissinger2种方法计算得到TLCP/PF复合体系的固化反应活化能(Ea)结果一致;通过KAS模型得到TLCP/PF复合体系不同的固化度下的Ea;TLCP的加入加速了酚醛树脂固化反应,降低了酚醛树脂固化反应活化能,当TLCP的质量分数为10%时,Ea最小。
Curing behavior of thermotropic liquid crystal polymer (TLCP) / phenolic resin (PF) composites at different heating rates was investigated by non-isothermal DSC method. Three phenomenological models (simple model of Ozawa and Kissinger, Kissinger-Akahira-Sunose (KAS) and other transformation models) were used to analyze and compare the curing reaction kinetics of TLCP / PF and pure PF. The influence of TLCP content on the curing reaction kinetics of TLCP / PF composite system was investigated. The results show that the two methods of Ozawa and Kissinger are used to calculate the activation energy (Ea) of TLCP / PF composite system. The Ea of TLCP / PF composite system with different curing degrees is obtained by KAS model. The addition of TLCP accelerates the formation of phenolic Resin curing reaction, reducing the curing reaction of phenolic resin activation energy, when the TLCP mass fraction of 10%, Ea minimum.