In this section, you can access to the latest technical information related to the FUTURE project topic.

Trifunctional quinoxaline?based maleimide and its polymer alloys with benzoxazine: Synthesis, characterization, and properties

AbstractNovel quinoxaline?based trismaleimide (2,3?di[3?maleimido]phenyl?6? maleimidoquinoxaline, namely TQMI) and its polymer alloys with 3?phenyl?3,4?dihydro?2H?1,3?benzoxazine (P?a) were successfully prepared and characterized. Differential scanning calorimetry investigation of TQMI exhibited distinct double exothermic peaks, which implied that the curing behavior of different type of maleimide group was discrepant. The curing temperature of P?a/TQMI prepolymers was lower than that of both neat TQMI and P?a monomer. The temperatures at 5% (T5) and 10% (T10) weight loss and the char yield (Yc) of cured TQMI at 800?C reached 513?C, 524?C, and 63.5%, respectively, which were much higher than the record of traditional 4,4??bismaleimideodiphenylmethane (BMDPM) resin as well as most of other reported bismaleimide resins. Moreover, the addition of TQMI enhanced thermal stability, glass transition temperature (Tg), and limiting oxygen index of benzoxazine resin dramatically. Attractively, the Tg value of P?a/TQMI copolymer at 30?wt% TQMI loadings was approximately 20?C higher than that of P?a/BMDPM copolymer owing to the bulky quinoxaline group.

» Author: Hui Wang, Abdul Qadeer Dayo, Jun Wang, Jun?yi Wang, Wen?bin Liu

» Reference: doi:10.1002/app.49694

» Publication Date: 27/07/2020

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