用于三官能环氧树脂的聚离子液体的合成，同时提高韧性、热性能和介电性能。

Synthesis of poly(ionic liquid) for trifunctional epoxy resin with simultaneously enhancing the toughness, thermal and dielectric performances.

作者信息

Yin Bingyan, Xu Wenqing, Liu Chengjun, Kong Miqiu, Lv Yadong, Huang Yajiang, Yang Qi, Li Guangxian

机构信息

School of Aeronautics and Astronautics, Sichuan University Chengdu 610065 People's Republic of China

College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University Chengdu 610065 People's Republic of China.

出版信息

RSC Adv. 2020 Jan 10;10(4):2085-2095. doi: 10.1039/c9ra10516f. eCollection 2020 Jan 8.

DOI:10.1039/c9ra10516f

PMID:35494607

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9048971/

Abstract

Poly(ionic liquid) (PIL), integrating the characteristics of both polymers and ionic liquid, is synthesized and employed to modify diglycidyl-4,5-epoxy-cyclohexane-1,2-dicarboxylate (TDE-85). With the addition of PIL, the fracture toughness, and thermal and dielectric performances of TDE-85 were discovered to be simultaneously improved, meanwhile the tensile modulus and strength is increased. Upon an optimal loading of 3 wt% PIL, the critical stress intensity factor ( ), tensile modulus and strength are raised by 92.9%, 13.3% and 10.7%, respectively. Multi-toughening mechanisms due to spherical domains of PIL formed in TDE-85 during curing are responsible for the improved toughness. Moreover, the dielectric and thermal properties of TDE-85 are also enhanced by adding PIL. With the optimal addition of 5 wt% PIL, the dielectric constant of the composites is enhanced by 62.5%, the glass transition temperature is increased by 16.58 °C and the residual weight of carbon is increased by 59%.

摘要

聚离子液体（PIL）兼具聚合物和离子液体的特性，通过合成并用于改性4,5-环氧环己烷-1,2-二甲酸二缩水甘油酯（TDE-85）。添加PIL后，发现TDE-85的断裂韧性、热性能和介电性能同时得到改善，同时拉伸模量和强度也有所提高。当PIL的最佳添加量为3 wt%时，临界应力强度因子（）、拉伸模量和强度分别提高了92.9%、13.3%和10.7%。固化过程中在TDE-85中形成的PIL球形域导致的多重增韧机制是韧性提高的原因。此外，添加PIL也提高了TDE-85的介电和热性能。当PIL的最佳添加量为5 wt%时，复合材料的介电常数提高了62.5%，玻璃化转变温度提高了16.58℃，碳的残留重量增加了59%。