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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Manipulating Frontal Polymerization and Instabilities with Phase-Changing Microparticles
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Manipulating Frontal Polymerization and Instabilities with Phase-Changing Microparticles

机译：用相变微粒操纵正面聚合和稳定性

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摘要

Recently presented as a rapid and eco-friendly manufacturing method for thermoset polymers and composites, frontal polymerization (FP) experiences thermo-chemical instabilities under certain conditions, leading to visible patterns and spatially dependent material properties. Through numerical analyses and experiments, we demonstrate how the front velocity, temperature, and instability in the frontal polymerization of cyclooctadiene are affected by the presence of poly(caprolactone) microparticles homogeneously mixed with the resin. The phase transformation associated with the melting of the microparticles absorbs some of the exothermic reaction energy generated by the FP, reduces the amplitude and order of the thermal instabilities, and suppresses the front velocity and temperatures. Experimental measurements validate predictions of the dependence of the front velocity and temperature on the microparticle volume fraction provided by the proposed homogenized reaction-diffusion model.
机译：作为热固性聚合物和复合材料的一种快速、环保的制造方法，前沿聚合（FP）在某些条件下会经历热化学不稳定性，导致可见图案和空间相关的材料特性。通过数值分析和实验，我们证明了均匀混合在树脂中的聚己内酯微粒的存在如何影响环辛二烯正面聚合的前沿速度、温度和不稳定性。与微粒熔化相关的相变吸收了FP产生的一些放热反应能量，降低了热不稳定性的幅度和顺序，并抑制了前沿速度和温度。实验测量验证了所提出的均匀化反应扩散模型所提供的微粒体积分数对前沿速度和温度依赖性的预测。

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