高强衣康酸基环氧类玻璃高分子的制备与性能

以生物衣康酸为环氧单体,自主合成含硼酸酯键的三羧酸交联剂((Hexamethylene Tri(urethane-boronic ester-benzoic acid)-HBN)),通过环氧-羧基反应固化,制备出含双重动态硼酸酯键和酯键的生物衣康酸基环氧类玻璃高分子网络。分别利用红外光谱和氢谱分析对合成的聚合物材料和交联剂进行结构表征,成功合成了双重动态硼酸酯键和酯键的衣康酸基环氧高分子网络和三羧酸交联剂。然后对衣康酸基环氧高分子网络进行力学性能、热稳定性、热力学性能和应力松弛测试,研究不同HBN交联剂含量对衣康酸基环氧高分子网络性能的影响,结果表明:衣康酸基环氧高分子网络具有高的力学性能和热稳定性。此外,探究不同HBN添加量对衣康酸基环氧高分子网络的自修复和化学回收性能的影响,结果表明:EIA-HB-6网络具有优异的自修复和化学回收性能。

绿色覆铜板的开发

前言随着社会与经济技术的快速进步和发展,材料对环境的影响及对人体健康的安全性越来越备受关注。开发印制电路用绿色覆铜板(CCL),即非含卤素和锑元素的 CCL 已成为摆在 CCL 业界一项重要的课题,此课题的开发是环保的需要,也是未来市场竞争的需要。1 阻燃性 CCL 的构成目前,一般常用的阻燃性 CCL

Characteristics of Cyanate Ester and Fluorenyl Epoxy-Based Polymer-Ceramic Composites

In the field of highly integrated printed circuit board （PCB）, the heat resistant substrate with low water absorption is very important material. To get the resin composition for the high functional substrate material with low moisture absorption and high glass transition temperature （Tg） simultaneously, a fluorenyl ＂Cardo＂ epoxy was incorporated into novolac cyanate ester resin. As an optimum curing agent for the fiuorenyl epoxy, methyl nadic anhydride （MNA） was selected. Silica powders as fillers were added into the resin composition. The partial replacement of the cyanate ester resin with the fluorenyl epoxy could reduce the moisture absorption with keeping high glass transition temperature over 300 ℃. The laminate, which was fabricated from prepregs made with 40 wt% silica-filled resin composition and glass fabric, showed high Tg of 317 ℃ and low moisture absorption of 0.57%.