圆盘状液晶环氧树脂兼具固有高热导率和固有阻燃性。

Discotic Liquid Crystal Epoxy Resins Integrating Intrinsic High Thermal Conductivity and Intrinsic Flame Retardancy.

机构信息

Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Guangdong, 518057, P. R. China.

Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.

出版信息

Macromol Rapid Commun. 2022 Jan;43(1):e2100580. doi: 10.1002/marc.202100580. Epub 2021 Oct 17.

DOI:10.1002/marc.202100580

PMID:34626506

Abstract

The integration of intrinsic thermal conductivity and intrinsic flame retardancy of epoxy resins shows wider application prospects in electricals and electronics. Discotic liquid crystal epoxy (D-LCE) is synthesized from pyrocatechol, 2-allyloxyethanol, and 3-chloroperoxybenzoic acid. P/Si synergistic flame-retardant co-curing agent (DOPO-POSS, DP) is synthesized from p-hydroxybenzaldehyde, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO), and amino terminated polysilsesquioxane (POSS). Finally, D-LCE is cured within liquid crystal range with 4, 4'-diaminodiphenyl methane (DDM) and DP, to obtain intrinsic highly thermal conductive/flame-retardant epoxy resins (D-LCER ). D-LCER (10.0 wt% DP) synchronously possesses excellent intrinsic thermal conductivity and intrinsic flame retardancy, with thermal conductivity coefficient in vertical and parallel direction (λ and λ ) of 0.34 and 1.30 W m K , much higher than that of general bisphenol A epoxy resin (E-51, λ of 0.19 W m K , λ of 0.65 W m K ). The limiting oxygen index (LOI) value of D-LCER reaches 31.1, also better than those of E-51 (19.8) and D-LCER (21.3).

摘要

环氧树脂的固有热导率和固有阻燃性的融合在电子和电子领域显示出更广阔的应用前景。从邻苯二酚、2-烯丙氧基乙醇和 3-氯过苯甲酸合成了盘状液晶环氧树脂（D-LCE）。P/Si 协同阻燃共固化剂（DOPO-POSS，DP）是由对羟基苯甲醛、9,10-二氢-9-氧杂-10-磷杂菲 10-氧化物（DOPO）和氨基封端的聚倍半硅氧烷（POSS）合成的。最后，D-LCE 在液晶范围内与 4,4'-二氨基二苯甲烷（DDM）和 DP 固化，得到固有高导热/阻燃环氧树脂（D-LCER）。D-LCER（10.0wt%DP）同时具有优异的固有导热性和固有阻燃性，垂直和平行方向的导热系数（λ和λ）分别为 0.34 和 1.30 W m K，远高于普通双酚 A 环氧树脂（E-51，λ为 0.19 W m K，λ为 0.65 W m K）。D-LCER 的极限氧指数（LOI）值达到 31.1，也优于 E-51（19.8）和 D-LCER（21.3）。