Abstract: A series of poly（vinyl chloride） （PVC）/epoxy resin （E-12）/maleimaric anhydride （MPA） composite foaming materials were successfully prepared through melt blending and irradiation crosslinking. The chemical structure of MPA was characterized using Fourier-transform infrared spectroscopy and nuclear magnetic resonance spectroscopy （1H-NMR and 13C-NMR）. The effects of curing content of E-12/MPA （EM） on the properties of the composite foaming materials were investigated by means of gelatin content， mechanical measurement， scanning electron microscopy， and water absorption tests. The results indicated that the composite foaming materials containing 10 wt% EM obtained a gelatin content of 42.3 wt%， which was 9.9 % higher than that before modification. Compared to pure PVC foaming material， the composite foaming ones showed an increase in tensile strength by 23.4 %，in compression strength by 26.7 %， and in compression modulus by 32.5 %. The elongation at break of the composite foaming materials decreased from 306.33 % to 220.68 %， and their water absorption increased from 1.5 % to 3.4 %. The composite foaming materials also exhibited a good cell structure.

Key words: poly（vinyl chloride）, gallic acid-based epoxy resin, mechanical property, foam material