摘要
采用非等温DSC法研究了适合于拉挤工艺的乙烯基酯树脂体系固化反应动力学,用Kissinger方程和Crane方程求得树脂体系固化反应的表观活化能为68.3kJ/mol,反应级数为0.918。通过活化能与固化放热量的对比与实验观察,发现在拉挤工艺初期存在温升现象,常规数学模型难以模拟拉挤初期的热量平衡;通过基于非等温DSC法的固化度分析,认为高效的拉挤工艺通常会伴随低的固化度,并从树脂配方体系和工艺方面提出了解决方案。
The curing kinetics of the vinyl ester resin used in pultrusion process was studied by non-isothermal DSC test, and the apparent activation energy(ΔE) and the reaction order(n) of the curing reaction were calculated by using the Kissinger and Crane equation. At the earlier stage of the pultrusion, the inner temperature of the die increases continuously, which results from the difference of ΔE and the curing exotherm ΔH, and the temperature un-equilibrium easily leads to poor composite quality and un-stability or even the failure of the pultrusion process. By analyzing the degree of cure measured by DSC and experimental observation, some solutions for the problem were provided.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2004年第3期183-186,共4页
Polymer Materials Science & Engineering
基金
国家863计划资助项目(2001AA335030)
