Ma, R. F.; Ding, H. T.; Zhang, Y. T.; Guo, Y.; Zuo, X. B.; Shang, C. Y.; Zheng, K.; Zhou, H. Fabrication and property evaluation of indane-containing bismaleimide resins. Acta Polymerica Sinica, 2025, 56(11), 2042-2049
Bismaleimide resin (BMI) is an important structural thermoset renowned for its exceptional thermal stability. However
achieving simultaneously enhancements in thermal resistance and mechanical performance without compromising processability remains an open challenge in advanced BMI technology. To address this issue
we designed and synthesized a novel bismaleimide monomer (BPM) containing an indane structure and prepared BPM resin using diallyl bisphenol-A (DABPA) as a modifier. This work systematically investigated the effect of the indane architecture on the resin's processibility
thermal endurance
and mechanical behavior. The results show that the melting point of the BPM mon
omer is only 74 ℃
53.7% lower than that of the diphenylmethane-type bismaleimide (BDM
160 ℃)
thereby expanding the processing window of BPM resin from 110-140 ℃ to 90-195 ℃ and significantly improving processability. Resins containing BPM monomers exhibit superior heat resistance compared to those without BPM
increasing the glass transition temperature (
T
g
) by up to 7% (from 287 ℃ to 308 ℃) and improving impact strength by 27% (from 22 kJ/m
2
to 28 kJ/m
2
). These advancements arise from the asymmetric rigidity of the indane moiety
which enables synergistic optimization of thermal stability
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