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首页> 外文期刊>Journal of Applied Polymer Science >Critical Gel Phenomena in the Rheology of Epoxide Network Formation
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Critical Gel Phenomena in the Rheology of Epoxide Network Formation

机译：环氧网络形成流变中的临界凝胶现象

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摘要

Multiple frequency dynamic mechanical experiments are genrated by the linear addition of harmonic sinusoidal waves in order to study the gelation behavior of a crosslinking epoxy-bisphenol-A copolymerization. The following three criteria are investigated as kinetic parameters for the network formation: equivalence of the moduli increase, the critical gel condition, and the mechanical gel condition. The effect of strain magnitude is investigated for both the gelation phenomena and the scaling exponent of the critical gel behavior. The exponent is found to vary from 0.85 to 0.65, depending on the reaction temperature and waveform of the strain input. When Arrhenius type behavior is found, the activation energy of the gelation process is found to be 21 (+-)1 kcal/mol. The effects of vitrification, network rupture, and nonlinear viscoelastic response were found with respect to the frequency probe.
机译：为了研究交联环氧-双酚-A共聚的胶凝行为，通过谐波正弦波的线性相加来产生多频动态力学实验。以下三个标准作为网络形成的动力学参数进行了研究：模量增加的当量，临界凝胶条件和机械凝胶条件。对于凝胶现象和临界凝胶行为的定标指数，都研究了应变幅度的影响。发现该指数在0.85至0.65之间变化，具体取决于反应温度和应变输入波形。当发现Arrhenius型行为时，发现胶凝过程的活化能为21（±）1kcal / mol。相对于频率探头，发现了玻璃化，网络破裂和非线性粘弹性响应的影响。

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