Asymmetric bismaleimide-based high-performance resins with improved processability and high T_g over 400 °C

Abstract

Asymmetric 2-(4′-maleimido)phenyl-2-(4′-maleimidophenoxyl)phenylbutane (EBA-BMI) was successfully mixed with N, N′-(4,4′-diphenylmethane)bismaleimide (DDM-BMI) to prepare the matrix resins for high-temperature fiber-reinforced polymeric composites (glass transition temperature ( Tg) > 400°C). Experimental results imply that DDM-BMI/EBA-BMI (DE-BMIs) show excellent melting performance with wide processing temperature window and low molten viscosity, suggesting excellent compatibility between DDM-BMI and EBA-BMI. For example, the viscosity of DE-BMI41 (DDM-BMI/EBA-BMI, 4/1) is about 474–51 mPa·s in the temperature range of 148–180 °C. In addition, cured DE-BMIs represent remarkable thermal properties with Tg over 400°C, under which the storage modulus could still reach as high as 3.2 GPa. Meanwhile, the coefficient of thermal expansion of these cured resins is about 36–40 ppm °C−1 at 50–250°C, and the 5% weight loss temperature is about 470°C.

Cross-Linking of Sago Starch with Furan and Bismaleimide via the Diels-Alder Reaction

“…8), two transitions were observed at the temperature range of 50°C-70°C and at the temperature range of 125°C-150°C, where both transitions are absent in the thermogram of native sago starch and starch furoate. The presence of initial transitions (50°C-70°C) and second endothermic transitions (range 125°C-150°C, in the third cycle) in the cross-linked starch [36] may be related to the glass transition of the amorphous portion and retro DA reaction [22,33,37], respectively Furthermore, as described in the literature [38], the glass transition temperature (Tg) of BM is expected to show at temperatures greater than 400°C (T > 400°C), which is beyond of the measurement scope in our work.…”

High-Performance Bismaleimide Resin with an Ultralow Coefficient of Thermal Expansion and High Thermostability

“…In addition, our results were compared to the other reported pure and modified − ,− BMI resins. As shown in Figure , the four pp -XBDM resins were located in the bottom right corner, indicating their high thermostability and ultralow CTE.…”

“…(The plot for pure cured BDM was obtained from ref . The T g of the BMI resin from ref was above 400 °C).…”

Preparation and properties of bismaleimide resin blended with alkynyl-terminated modifiers

“…Over the past decades, various attempts have been developed to improve the toughness of BMI resins, including copolymerization of allyl compounds, diamine chain extension, thermoplastic resin modification, rubber toughening, synthesis of new BMI monomers, and so on. 1,[9][10][11][12][13][14][15] Among these, the copolymerization with allyl compounds can both improve the toughness of BMI resins and maintain high heat resistance, making it the most reliable method for reducing the brittleness of BMI resin and improving its processing characteristics. Diallyl bisphenol A (DABPA) is perceived as the most popular allyl compound to modify BMI resins, and significant achievements have been made so far.…”