Abstract Thermal properties of epoxy networks We present a combined experimental and theoretical investigation of thermal properties of cycloaliphatic epoxy networks. The networks are prepared from 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate ERL-4221 as a monomer and 4-methylhexahydrophthalic anhydride as a curing agent and their glass transition temperature Tg is evaluated by dynamic mechanical and thermal mechanical analyses as well as by differential scanning calorimetry. It is found that the cured epoxy networks have high Tg values reaching 233–238 °C. The method of anharmonic oscillators is first proposed to simulate the effect of network structure on the thermal properties. It suggests that further increase of Tg values is not attained because of the formation of intramolecular cyclic structures. Studies of model reaction by mass-spectrometry confirm the formation of such structures at curing.

中文翻译：

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揭示阻碍形成具有极高热性能的环氧树脂网络的缺陷：理论和实验

摘要环氧树脂网络的热性能我们提出了脂环族环氧树脂网络热性能的结合实验和理论研究。该网络由 3,4-环氧环己基甲基-3,4-环氧环己烷羧酸酯 ERL-4221 作为单体和 4-甲基六氢邻苯二甲酸酐作为固化剂制备，其玻璃化转变温度 Tg 通过动态力学和热力学分析以及通过差示扫描量热法。发现固化的环氧树脂网络具有高达 233–238 °C 的高 Tg 值。首次提出了非谐振荡器的方法来模拟网络结构对热性能的影响。这表明由于分子内环状结构的形成，Tg 值不会进一步增加。