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首页> 外文期刊>Journal of Applied Polymer Science >Thermal and mechanical properties of tetra-functional mesogenic type epoxy resin cured with aromatic amine
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Thermal and mechanical properties of tetra-functional mesogenic type epoxy resin cured with aromatic amine

机译：芳香族胺固化的四官能介性型环氧树脂的热和力学性能

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摘要

A novel tetra-functional epoxy monomer with mesogenic groups was synthesized and characterized by H-1-NMR and FTIR. The synthesized epoxy monomer was cured with aromatic amine to improve the thermal property of epoxy/amine cured system. The glass transition temperature (T-g) and coefficient of thermal expansion (CTE) of the cured system were investigated by dynamic mechanical analysis and thermal mechanical analysis. The properties of the cured system were compared with the conventional bisphenol-A type epoxy and mesogenic type epoxy system. The storage modulus of the tetra-functional mesogenic epoxy cured systems showed the value of 0.96 GPa at 250 degrees C, and T-g-less behavior was clearly observed. The cured system also showed a low CTE at temperatures above 150 degrees C without incorporation of inorganic components. These phenomena were achieved by suppression of the thermal motion of network chains by introduction of both mesogenic groups and branched structure to increase the cross linking density. The temperature dependency of the tensile property and thermal conductivity of the cured system was also investigated. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46181.
机译：用H-1-NMR和FTIR合成新型具有介质基团的四官能环氧单体。合成的环氧单体用芳族胺固化，以改善环氧/胺固化体系的热性。通过动态力学分析和热力学分析研究了固化系统的玻璃化转变温度（T-G）和热膨胀系数（CTE）。将固化系统的性质与常规双酚-A型环氧和介酚型环氧系统进行比较。 Tetra-官能脱源环氧树脂固化系统的储存模量在250℃下显示出0.96GPa的值，并且清楚地观察到T-G的行为。固化系统还在150摄氏度高于150℃的温度下显示出低CTE，而不掺入无机组分。通过引入介导基团和支链结构来抑制网络链的热运动来实现这些现象，以增加交叉连接密度。还研究了拉伸性能和固化系统的热导率的温度依赖性。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,46181。

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