Chen Chien-Han, Lee Kuan-Wei, Lin Ching-Hsuan, Juang Tzong-Yuan
Department of Chemical Engineering, National Chung Hsing University, Taichung 402, Taiwan.
Department of Cosmeceutics, China Medical University, Taichung 404, Taiwan.
Polymers (Basel). 2018 Apr 7;10(4):411. doi: 10.3390/polym10040411.
Poly(2,6-dimethyl phenyl oxide) (PPO) is known for its low dissipation factor. To achieve insulating materials with low dissipation factors for high-frequency communication applications, a telechelic oligomer-type benzoxazine (P-APPO) and a main-chain type benzoxazine polymer (BPA-APPO) were prepared from an amine end-capped oligo (2,6-dimethyl phenylene oxide) (APPO). The APPO was prepared from a nucleophilic substitution of a phenol-end capped oligo (2,6-dimethyl phenylene oxide) (a commercial product, SA 90) with fluoronitrobenzene, and followed by catalytic hydrogenation. After self-curing or curing with a dicyclopentadiene-phenol epoxy (HP 7200), thermosets with high- and low-dissipation factor can be achieved. Furthermore, the resulting epoxy thermosets show better thermal and dielectric properties than those of epoxy thermoset cured from its precursor SA90, demonstrating it is a successful modification in simultaneously enhancing the thermal and dielectric properties.
聚（2,6-二甲基苯醚）（PPO）以其低损耗因数而闻名。为了获得用于高频通信应用的具有低损耗因数的绝缘材料，由胺封端的低聚（2,6-二甲基苯醚）（APPO）制备了一种遥爪低聚体型苯并恶嗪（P-APPO）和一种主链型苯并恶嗪聚合物（BPA-APPO）。APPO是由酚封端的低聚（2,6-二甲基苯醚）（一种商业产品，SA 90）与氟代硝基苯进行亲核取代反应，然后进行催化氢化反应制备而成。经过自固化或与二环戊二烯-酚环氧树脂（HP 7200）固化后，可以得到具有高损耗因数和低损耗因数的热固性材料。此外，所得的环氧热固性材料比由其前体SA90固化得到的环氧热固性材料表现出更好的热性能和介电性能，表明这是一种在同时提高热性能和介电性能方面的成功改性。
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