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首页> 外文期刊>Journal of Applied Polymer Science >CURING REACTIONS AND MODELING OF SILICONE-CARBON RESINS
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CURING REACTIONS AND MODELING OF SILICONE-CARBON RESINS

机译：硅碳树脂的固化反应和建模

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New silicone-carbon resins have been made, based on four- or five-membered cyclosiloxanes, cyclopentadiene dimer (DCPD), and cyclopentadiene trimer (TCPD). The monomers are first polymerized to a B-stage resin, and then heated at higher temperatures to cure. In this work, the curing reaction of this silicone-carbon resin (which leads to network formation) is simulated using two approaches. In the first approach (stochastic model), all the available functional groups (olefin and silyl hydride) are allowed to react with each other with equal probability. This gives the kinetically controlled, liquidlike, diffusion-free limit. Extrapolation of the model to reactions where diffusion may play a role can be made by including molecular weight dependence in the rates. This dependence on the molecular weight can be scaled to fit the experimental data. In the second approach a percolation model is used. In the extreme case, this model corresponds to the solid-state reaction between silicone-carbon resin molecules on 2-dimensional or 3-dimensional rigid lattices. Relaxation of this geometric constraint can be made by providing a larger reacting distance between the reactants. Computer programs have been written for 2- and 3-dimensional lattices. Illustrative examples are given for these approaches. (C) 1997 John Wiley & Sons, Inc. [References: 32]
机译：基于四元或五元环硅氧烷，环戊二烯二聚体（DCPD）和环戊二烯三聚体（TCPD）的新型有机硅碳树脂已经制成。首先将单体聚合成B级树脂，然后在更高的温度下加热以固化。在这项工作中，使用两种方法模拟了这种有机硅-碳树脂的固化反应（导致网络形成）。在第一种方法（随机模型）中，允许所有可用的官能团（烯烃和甲硅烷基氢化物）以相等的概率相互反应。这给出了动力学控制的，类似液体的无扩散极限。通过将分子量依赖性包括在速率中，可以将模型外推至可能在扩散中起作用的反应。这种对分子量的依赖性可以按比例调整以适合实验数据。在第二种方法中，使用渗滤模型。在极端情况下，该模型对应于二维或三维刚性晶格上的有机硅-碳树脂分子之间的固态反应。可以通过在反应物之间提供更大的反应距离来放松这种几何约束。已经为二维和三维晶格编写了计算机程序。这些方法给出了说明性示例。 （C）1997 John Wiley＆Sons，Inc. [参考：32]

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