Unleashing the Power of Bio-based Thermotropic Liquid Crystal Modifiers: Toughening and Reinforcing Petroleum-based Epoxy Resin without Compromising Other Properties

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-06-26 DOI:10.1007/s10118-024-3149-x
Qing-Yun Lu, Hong-Wei Gu, Jia-Hui Li, Qian-Qian Fan, Bei-Tao Liu, Yan Kou, Xi-Gao Jian, Zhi-Huan Weng
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Abstract

Toughening the petroleum-based epoxy resin blends with bio-based modifiers without compromising their modulus, mechanical strength, and other properties is still a big challenge in view of the sustainability. In this study, a bio-based liquid crystal epoxy resin (THMT-EP) with an s-triazine ring structure was utilized to modify a petroleum-based bisphenol A epoxy resin (E51) with 4,4′-diaminodiphenylsulfone (DDS) as a curing agent, and the blended systems were evaluated for their thermal stability, mechanical properties, and flame retardancy. The results showed that the impact strength of the blended system initially increased and then decreased with the increase in THMT-EP content, and it reached the a maximum value of 26.5 kJ/m2 when the THMT-EP content was 5%, which was 31.2% higher than that of E51/DDS. Notably, the flexural strength, modulus, and glass transition temperature of the blended system were all simultaneously improved with the addition of THMT-EP. At the same time, the addition of THMT-EP enhanced the flame retardancy of the system by increasing the char yield at 700 °C and decreasing the peak heat release rate and total heat release rate. This work paves the way for a more sustainable improvement in the comprehensive performance of epoxy resin.

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释放生物基热致变性液晶改性剂的能量:在不影响其他性能的前提下增韧和增强石油基环氧树脂
从可持续发展的角度来看,用生物基改性剂增韧石油基环氧树脂混合物而不影响其模量、机械强度和其他性能仍然是一个巨大的挑战。本研究利用具有 s-三嗪环结构的生物基液晶环氧树脂(THMT-EP)来改性以 4,4′-二氨基二苯砜(DDS)为固化剂的石油基双酚 A 环氧树脂(E51),并对混合体系的热稳定性、机械性能和阻燃性进行了评估。结果表明,随着 THMT-EP 含量的增加,共混体系的冲击强度先升高后降低,当 THMT-EP 含量为 5%时,冲击强度达到最大值 26.5 kJ/m2,比 E51/DDS 高 31.2%。值得注意的是,添加 THMT-EP 后,混合体系的抗折强度、模量和玻璃化转变温度都同时得到了提高。同时,THMT-EP 的添加还提高了体系的阻燃性,增加了 700 °C 时的产炭量,降低了峰值放热率和总放热率。这项工作为更持久地改善环氧树脂的综合性能铺平了道路。
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来源期刊
Chinese Journal of Polymer Science
Chinese Journal of Polymer Science 化学-高分子科学
CiteScore
7.10
自引率
11.60%
发文量
218
审稿时长
6.0 months
期刊介绍: Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.
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