Achieving anti-moisture absorption and high thermal properties in bio-based polyamide 56/F-based heat-resistant agent composites through crystal regulation

The anti-moisture absorption and thermal properties of bio-based polyamide 56 (PA56) were improved by adding heat-resistant agents to expand its application in the automotive field. Two macromolecular heat-resistant agents, p(N-(4-F-phenylmaleimide)-alt-styrene) (PFS) and p(N-(4-F-phenylmaleimide)-alt-triallyl isocyanurate) (PFT), were synthesized via precipitation polymerization, and their effects on the thermal properties, mechanical properties, and anti-moisture absorption of PA56 were studied. Compared with PA56, the heat deflection temperature of PA56/PFS and PA56/PFT composites was improved by 11.9% and 21.2%, with their anti-moisture absorption increasing by 14.6% and 15.5%, respectively. This is due to the crystallization of PA56 has been promoted and its more complete crystal structure has been obtained.