Analysis of the glass effect and Trommsdorff effect during bulk polymerization of methyl methacrylate, ethyl methacrylate, and butyl methacrylate
Analysis of the glass effect and Trommsdorff effect during bulk polymerization of methyl methacrylate, ethyl methacrylate, and butyl methacrylate
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甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯本体聚合过程中的玻璃效应和特罗姆斯多夫效应分析
DOI：
10.1038/s41428-022-00746-5
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发表时间：
2023
期刊：
影响因子：
2.8
通讯作者：
Matsumoto Akikazu
中科院分区：
文献类型：
--
作者：
Suzuki Yasuhito;Mishima Ryutaro;Kato Eri;Matsumoto Akikazu
玻璃化聚合物和小分子的相对浓度变化可能引起玻璃化。本体聚合是单体/聚合物浓度通过化学反应发生变化的一个例子。在本体聚合过程中，可能会发生反应加速（特罗姆斯多夫效应）和随后的反应减速（玻璃效应）。本文系统地研究了甲基丙烯酸甲酯、甲基丙烯酸乙酯和甲基丙烯酸丁酯的特罗姆斯多夫效应和玻璃效应。根据等温差示扫描量热法（DSC）数据，阐明了转化随反应时间的变化规律。在所有实验条件下，在特罗姆斯多夫效应开始时，观察到明显的相分离。我们将这些影响与玻璃化转变以及本体聚合过程中非晶结构的变化结合起来进行了研究。
Relative concentration changes of glassy polymer and small molecules may cause vitrification. Bulk polymerization is one example where the monomer/polymer concentration changes via a chemical reaction. During bulk polymerization, reaction acceleration (Trommsdorff effect) and subsequent reaction deceleration (glass effect) may occur. Herein, we systematically investigated the Trommsdorff and glass effects of methyl methacrylate, ethyl methacrylate and butyl methacrylate. The conversion as a function of the reaction time was elucidated based on isothermal differential scanning calorimetry (DSC) data. Under all examined experimental conditions, at the onset of the Trommsdorff effect, apparent phase separation was observed. We examined these effects in conjunction with glass transition as well as the change in the amorphous structure during bulk polymerization.