炭/炭复合材料用糠酮树脂先驱体的固化特性及动力学分析

Curing characteristics and kinetic analysis of furfural acetone resin used as carbon/carbon composites precursor

采用品氏粘度计表征了室温下磷酸/糠酮树脂固化体系的粘度变化,采用热重(TGA)-差热(SDTA)同步分析仪测试了其固化过程,以研究固化剂含量和升温速率对其固化反应的影响。同时,采用一定工艺制备固化后的试样并进行验证。结果发现,即使在室温条件下,固化反应也在缓慢进行;固化剂含量为6.67%的固化体系固化后质量损失较小,表观比较致密;加热速率为2 K/min时,有利于固化反应的进行。在此基础上,采用Malek最大概然机理函数法求取固化反应动力学参数,建立了描述该体系固化反应的动力学模型。

The viscosity change of phosphate/furfural acetone resin curing system at room temperature was characterized by viscometer. The curing process was tested by TEA/SDTA analyzer to study the effects of curing agent content and heating rate on curing reaction. Meanwhile samples were prepared by curing process to verify the results. The results show that viscosity of the system increases with curing time and curing system with the phosphorus acid curing agent content of 6.67% has lower mass loss and more compact surface. The heating rate of 2 k/min is beneficial to curing process. Based on the conclusion, Malek isoconversional method was used to determine the kinetic parameters and establish kinetic model of curing reaction.