Enhanced heat resistance of ABS/poly(N-(4-fluorophenyl) maleimide-alt-triallyl isocyanurate) composites based on solid-state interfacial reaction

The poor heat resistance of acrylonitrile-butadiene-styrene copolymer (ABS) is a significant limitation that restricts its application in various fields, including automotive, electronic devices and other fields. To address this issue, we employed a strategy involving the crosslinking of a macromolecular heat-resistant agent to enhance the heat resistance of ABS. Poly(N-(4-fluorophenyl) maleimide-alt-triallyl isocyanurate) (PFT), a reactive heat-resistant agent known for its rigid and reactive structures, was selected for this purpose. ABS/PFT composites were prepared by subjecting them to γ-ray irradiation, resulting in crosslinking through a solid-state interfacial reaction (SSIR) between PFT and ABS. The results show that the heat distortion temperature (HDT), glass transition temperature (Tg), tensile strength and bending strength of the irradiated ABS/PFT (i-ABS/PFT) composites increased by 23.86%, 23.35%, 20.0% and 9.0%, respectively compared to pure ABS. Furthermore, ABS/PFT composites with SSIR exhibit the highest heat resistance, Tg and HDT compared to non-SSIR ABS. The work presented in this paper provides a new direction for the heat-resistant modification of ABS and will expand its application in new fields.