THE CURING OF UNSATURATED POLYESTER RESINS IN ADIABATIC REACTORS AND HEATED MOLDS
THE CURING OF UNSATURATED POLYESTER RESINS IN ADIABATIC REACTORS AND HEATED MOLDS
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DOI：
10.1002/pen.760211703
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发表时间：
1981-01-01
影响因子：
3.2
通讯作者：
WILLIAMS, RJJ
中科院分区：
文献类型：
--
作者：
ROJAS, AJ;BORRAJO, J;WILLIAMS, RJJ
讨论了几种工艺参数对多用途不饱和聚酯与苯乙烯在加热模具中固化的影响。在考虑热损失修正的准绝热反应器中研究了聚合动力学。得到：dx/dt= k′[I](1−x)3exp(−16.6/RT)，其中为不饱和键的转化率，[I]为起始引发剂浓度（过氧化苯甲酰）；八酸钴被用作加速剂。样品在两种加热模具中固化（一种是夹套的，另一种是电加热的），并记录温度曲线。以反应速率（阿伦尼乌斯指数前因子）为函数绘制时，中间层的温升达到最大值，与先前的理论预测一致。对于热引发反应，温度的升高得到了加强。
The influence of several process parameters on the curing of multipurpose unsaturated polyesters with styrene, in heated molds, is discussed. The polymerization kinetics was studied in a quasi‐adiabatic reactor taking into account corrections for heat losses. The following expression resulted: dx/dt= k′[I](1 −x)3exp(−16.6/RT), wherexis the conversion of unsaturated bonds and [I] is the initial initiator concentration (benzoyl peroxide); cobalt octoate was used as an accelerator. Specimens were cured in two kinds of heated molds (one jacketed and the other electrically heated), and temperature profiles recorded. The temperature increase at the midplane showed a maximum when plotted as a function of the reaction rate (Arrhenius preexponential factor), in agreement with previous theoretical predictions. The temperature increase was enhanced for a thermally initiated reaction.