Low-temperature processable glass fiber reinforced aromatic diamine chain extended bismaleimide composites with improved mechanical properties,Polymer Composites

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Low-temperature processable glass fiber reinforced aromatic diamine chain extended bismaleimide composites with improved mechanical properties
Polymer Composites ( IF 4.8 ) Pub Date : 2022-06-06 , DOI: 10.1002/pc.26760
Sivaprakash Srinivasan ₁ , Siva Kaylasa Sundari Saravanamuthu ₂ , Shamim Rishwana Syed Mohammed ₂ , Dhanalakshmi Jeyaraj Pandian ₂ , Vijayakumar Chinnaswamy Thangavel ₁

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The synthesis of 4,4′-bismaleimido diphenylmethane (BMIM) and modified BMIM by its chain extension using commercially available aromatic diamines like 4,4′-diamino diphenyl methane (DDM), 4,4′-diaminodiphenyl sulphone (DDS), and 4,4′-diamine diphenyl ether (DDE) was done. The synthesized materials have been characterized for structural aspects using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The structure of BMIM was confirmed due to the presence of specific bands at ~1400 and 1705 cm⁻¹ responsible for CC and OCNCO groups, respectively. The reduction in the heat of fusion and enthalpy of curing for chain extended bismaleimides/modified BMIM shows the influence of the swivel group in diamine during curing. The curing window has broadened for BMIM_M and BMIM_E by ~40°C and narrowed for BMIM_S by ~100°C. The mechanical properties and the chemical resistance were studied for the composites made from the BMIM and modified BMIM based composites. Fiber-enhanced modified bismaleimide resin has improved mechanical properties.

中文翻译：

具有改进机械性能的可低温加工玻璃纤维增强芳族二胺扩链双马来酰亚胺复合材料

4,4'-双马来酰亚胺基二苯甲烷 (BMIM) 和改性 BMIM 的扩链使用市售芳族二胺如 4,4'-二氨基二苯甲烷 (DDM)、4,4'-二氨基二苯砜 (DDS) 和完成了 4,4'-二胺二苯醚 (DDE)。使用傅里叶变换红外光谱 (FTIR)、差示扫描量热仪 (DSC) 和热重分析 (TGA) 对合成材料的结构方面进行了表征。由于在~1400 和 1705 cm ^-1处存在负责 CC 和 OC  N  CO 的特定带，证实了 BMIM 的结构组，分别。扩链双马来酰亚胺/改性 BMIM 的熔化热和固化焓的降低表明了固化过程中二胺中的旋转基团的影响。BMIM_M 和 BMIM_E 的固化窗口扩大了约 40°C，BMIM_S 的固化窗口缩小了约 100°C。研究了由 BMIM 和改性 BMIM 基复合材料制成的复合材料的力学性能和耐化学性。纤维增强改性双马来酰亚胺树脂具有改善的机械性能。

更新日期：2022-06-06

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