Fluorine-containing main-chain type active esters as curing agents for epoxy resins to achieve superior dielectric and thermal performances

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-09-17 DOI:10.1016/j.porgcoat.2024.108806

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引用次数: 0

Abstract

Epoxy resins cured with active ester exhibited excellent dielectric properties but had deficiencies in thermal performance. To address this issue, this study synthesized three fluorine-containing main-chain type active ester curing agents (AE-1, AE-2, and AE-3) with bisphenol AF, isophthaloyl chloride and benzoyl chloride as raw materials. The effects of these active ester curing agents with different polymerization degree on the properties of dicyclopentadiene (DCPD) epoxy resins were investigated. Compared to the DCPD epoxy cured with AE-1，the DCPD epoxy cured with AE-3 which had high polymerization degree exhibited superior thermomechanical properties, thermal stability, and mechanical properties. Specifically, its glass transition temperature (T_g) measured by DMA (T_g -DMA) increased from 177 °C to 188 °C, T_g measured by TMA (T_g -TMA) increased from 130 °C to 149 °C, its 5 % mass loss temperature (T_d5%) rose from 336 °C to 359 °C, and the tensile strength improved from 38.5 MPa to 84.4 MPa. At 10 GHz, DCPD/AE-3 maintained excellent dielectric properties, with dielectric constant (D_k) and dissipation factor (D_f) values of 2.76 and 7.36 ‰, respectively. Epoxy resins cured with fluorine-containing main-chain type active ester exhibited excellent thermomechanical properties, mechanical properties, and hydrophobic properties while maintaining superior dielectric properties, broadening its application in packaging materials.

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含氟主链型活性酯作为环氧树脂固化剂，可实现优异的介电和热性能

用活性酯固化的环氧树脂具有优异的介电性能，但在热性能方面存在缺陷。针对这一问题，本研究以双酚 AF、间苯二甲酰氯和苯甲酰氯为原料，合成了三种含氟主链型活性酯固化剂（AE-1、AE-2 和 AE-3）。研究了这些不同聚合度的活性酯固化剂对双环戊二烯（DCPD）环氧树脂性能的影响。与用 AE-1 固化的双环戊二烯环氧树脂相比，用高聚合度的 AE-3 固化的双环戊二烯环氧树脂在热力学性能、热稳定性和机械性能方面都更胜一筹。具体来说，用 DMA 测量的玻璃化转变温度（Tg）从 177 ℃ 上升到 188 ℃，用 TMA 测量的玻璃化转变温度（Tg -TMA）从 130 ℃ 上升到 149 ℃，5% 质量损失温度（Td5%）从 336 ℃ 上升到 359 ℃，拉伸强度从 38.5 兆帕提高到 84.4 兆帕。在 10 GHz 频率下，DCPD/AE-3 保持了优异的介电性能，介电常数 (Dk) 和耗散因子 (Df) 值分别为 2.76 和 7.36 ‰。用含氟主链型活性酯固化的环氧树脂具有优异的热机械性能、机械性能和疏水性能，同时还保持了卓越的介电性能，从而拓宽了其在包装材料中的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.