Copolymerization, a straightforward and efficacious strategy for polymer property modulation, is employed in this study to fabricate a novel blend of Bis(3-ethyl-5-methyl-4-maleimidophenyl)methane (BMI-70), allyl bisphenol A (DABA) and benzoxazinonitrile-enriched allyl resins (DABA-ph). The polymerization reaction mechanism, curing behavior and processing properties—encompassing allyl, maleimide, benzoxazine, and nitrile—were investigated utilizing Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and dynamic rheological analysis (DRA). A rigorous assessment via mechanical testing, dynamic thermomechanical analysis (DMA), static thermomechanical analysis (TMA), SEM scanning, and thermogravimetric analysis (TGA), reveals the copolymerized composites' impressive mechanical attributes: a flexural strength of up to 160.67 MPa and a flexural modulus reaching 4340 MPa. Additionally, they display minimal thermal expansion at 1.32 %, robust heat resistance beyond a Tg of 357 °C, and commendable thermal stability with a T5% exceeding 420 °C. The study meticulously examines the influence of copolymerization processes and microstructural evolution on the composites' remarkable properties. The demonstrated thermo-mechanical and thermal stability suggest the broadened and potential application for the high-performance copolymerized resin.

中文翻译：

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认识多功能邻苯二甲腈改性双马来酰亚胺复合材料及其优异的力学性能


共聚是一种简单有效的聚合物性能调节策略，本研究采用共聚法制备了一种新型的双（3-乙基-5-甲基-4-马来酰亚胺苯基）甲烷 （BMI-70）、烯丙基双酚 A （DABA） 和富含苯并噁联氮腈的烯丙基树脂 （DABA-ph）。利用傅里叶变换红外光谱 （FTIR）、差示扫描量热法 （DSC） 和动态流变分析 （DRA） 研究了聚合反应机理、固化行为和加工特性——包括烯丙基、马来酰亚胺、苯并恶嗪和丁腈。通过机械测试、动态热机械分析 （DMA）、静态热机械分析 （TMA）、SEM 扫描和热重分析 （TGA） 进行的严格评估揭示了共聚复合材料令人印象深刻的机械属性：弯曲强度高达 160.67 MPa，弯曲模量达到 4340 MPa。此外，它们表现出 1.32 的最小热膨胀率、超过 357 °C 的稳健耐热性以及 T5% 超过 420 °C 的值得称道的热稳定性。 该研究仔细研究了共聚过程和微观结构演变对复合材料卓越性能的影响。所证明的热机械和热稳定性表明高性能共聚树脂的广泛和潜在应用。