Two new monomers were prepared by the reaction of 2-allylphenol and 4,4′-biphenyldicarbonyl chloride under different reaction conditions. The monomers were characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The curing processes of N,N-4,4′-bismaleimidodiphenylmethyene with 4,4′-bis(2-allylphenyl) biphenyldicarbonylate (BABC) and 4,4′-bis(2-propenylphenyl benzoate) ether (BPBE) were studied by rheological analysis and differential scanning calorimetry. Melting points of two monomers, BABC and BPBE, are 64°C and 121°C, respectively. The ABMI [4,4′-bis(2-allylphenyl)biphenyl bismaleimide] and PBMI [4,4′-bis(2-propenylphenyl)biphenyl bismaleimide] resins showed exothermic peaks at 233°C and 204°C, respectively. The measured melting points are significantly lower than that of the traditional bismaleimide resin which is modified by allyl bisphenol A. Dynamic mechanical analysis of the materials showed glass transition temperatures of ABMI and PBMI to be in the range of 213–258°C and 302–339°C, respectively. Thermogravimetric analysis of the cured resins showed 5% weight loss for ABMI and PMBI at 437°C and 428°C, along with char residues of 35.6–39.5%, respectively, at 800°C under nitrogen atmosphere. Furthermore, dielectric constants of propenyl-modified resins were lower (2.46–3.10) with dissipation factors of 0.0034–0.0036, compared with those of allyl bisphenol A resins.

中文翻译：

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用于双马来酰亚胺树脂改性的新型烯丙基和丙烯基单体，具有优异的介电性能和高玻璃化转变温度

2-烯丙基苯酚与4,4'-联苯二羰基氯在不同反应条件下反应制备了两种新单体。单体通过傅里叶变换红外光谱和核磁共振光谱表征。N,N-4,4'-双马来酰亚胺二苯基亚甲基与4,4'-双(2-烯丙基苯基)联苯二羰基酸酯(BABC)和4,4'-双(2-丙烯基苯基苯甲酸酯)醚(BPBE)的固化过程研究如下：流变分析和差示扫描量热法。两种单体 BABC 和 BPBE 的熔点分别为 64°C 和 121°C。ABMI [4,4'-双(2-烯丙基苯基)联苯双马来酰亚胺]和PBMI [4,4'-双(2-丙烯基苯基)联苯双马来酰亚胺]树脂分别在233°C和204°C显示放热峰。测得的熔点明显低于传统的由烯丙基双酚 A 改性的双马来酰亚胺树脂。材料的动态力学分析表明 ABMI 和 PBMI 的玻璃化转变温度在 213-258°C 和 302-分别为 339°C。固化树脂的热重分析表明，在 437°C 和 428°C 下，ABMI 和 PMBI 的重量损失为 5%，在 800°C 氮气氛下，焦炭残留量分别为 35.6-39.5%。此外，与烯丙基双酚 A 树脂相比，丙烯基改性树脂的介电常数较低 (2.46-3.10)，耗散因子为 0.0034-0.0036。材料的动态力学分析表明，ABMI 和 PBMI 的玻璃化转变温度分别在 213-258°C 和 302-339°C 的范围内。固化树脂的热重分析表明，在 437°C 和 428°C 下，ABMI 和 PMBI 的重量损失为 5%，在 800°C 氮气氛下，焦炭残留量分别为 35.6-39.5%。此外，与烯丙基双酚 A 树脂相比，丙烯基改性树脂的介电常数较低 (2.46-3.10)，耗散因子为 0.0034-0.0036。材料的动态力学分析表明，ABMI 和 PBMI 的玻璃化转变温度分别在 213-258°C 和 302-339°C 的范围内。固化树脂的热重分析表明，在 437°C 和 428°C 下，ABMI 和 PMBI 的重量损失为 5%，在 800°C 氮气氛下，焦炭残留量分别为 35.6-39.5%。此外，与烯丙基双酚 A 树脂相比，丙烯基改性树脂的介电常数较低 (2.46-3.10)，耗散因子为 0.0034-0.0036。