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首页> 外文期刊>Journal of Applied Polymer Science >Characterization of the cure of some epoxides and their sulphur-containing analogues with hexahydrophthalic anhydride by DSC and TGA
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Characterization of the cure of some epoxides and their sulphur-containing analogues with hexahydrophthalic anhydride by DSC and TGA

机译：用DSC和TGA表征六环邻苯二甲酸酐固化某些环氧化物及其含硫类似物

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摘要

A series of curing reactions of epoxides and different substituted (1,3-oxothiolane-2-thione)s with hexahydrophthalic anhydride in the presence of 2,4,6-tri(dimethylaminomethyl) phenol have been characterized by nonisothermal and isothermal differential scanning calorimetry (DSC). The DSC method was employed to investigate the thermal behavior of the systems cured and to evaluate the short-term stability of one-pot compositions. It was found that the cure processes of novel sulphur analogues of epoxides were generally described through lower(absolute) values of enthalpy of curing; on the other hand, the cure onset and the peak maximum temperatures were considerably higher. To evaluate the thermal stability of the networks obtained, thermogravimetric analysis (TGA) was applied. Its use allowed us to observe that derivatives of (1,3-oxothiolane-2-thione)Ei were thermally more stable that their analogue epoxides (up to 25 degrees C) and the degradation profiles depended on the steric hindrances and interactions introduced by the substituents used. (C) 1998 John Wiley & Sons, Inc. [References: 39]
机译：通过非等温和等温差示扫描量热法表征了环氧化物和不同取代的（1,3-氧代硫杂环戊基-2-硫酮）与六氢邻苯二甲酸酐在2,4,6-三（二甲基氨基甲基）苯酚存在下的一系列固化反应（DSC）。 DSC方法用于研究固化体系的热行为，并评估一锅组合物的短期稳定性。已经发现，通常通过较低（绝对）的固化焓值来描述新型环氧化物硫类似物的固化过程。另一方面，固化开始和最高峰值温度要高得多。为了评估获得的网络的热稳定性，应用了热重分析（TGA）。它的使用使我们可以观察到，（1,3-氧代硫杂环戊烷-2-硫酮）Ei的衍生物在热稳定性方面高于其类似的环氧化物（最高25摄氏度），并且其降解曲线取决于位阻和引入的相互作用。使用的取代基。 （C）1998 John Wiley＆Sons，Inc. [参考：39]

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