Background: In recent years

with decreasing global fossil resources and increasing "white pollution"

renewable and biodegradable materials attract more and more attentions. Poly(butylene succinate)(PBS) has good mechanical property

biodegradability and processing performance

which is the focus of hot topics in the study of biodegradable plastic materials

however

being soft and of high cost

it is still limited in application range. Purpose: In order to improve the mechanical and thermal properties

a series of wheat straw powder/PBS composites were prepared by melt extrusion

and then the 60Co-γ ray was directly utilized to irradiate the straw powder/PBS composite. Methods: The influence of TAIC(triallyl isocyanurate) radiation absorbed dose and radiation sensitizer on the mechanical property and thermal performance of straw powder/PBS composite was investigated

and the impact fracture surface morphology of the composite was observed by SEM(scanning electron microscope). Results: The tensile strength and flexural strength were enhanced with increasing radiation dosage

and then tend to be stable

the heat distortion temperature also increased but not significantly with increasing radiation dosage. The results show that when TAIC content is 2%

with straw powder/PBS composite irradiated by 30-kGy dose

the tensile strength and flexural strength are increased by 26% and 39.8%

respectively. Conclusion: The radiation modification of composite material has no effect on thermal stability

but do improve the tensile strength and flexural strength when up to 2% of TAIC is integrated and irradiated by certain dose. The interface cohesiveness between straw powder and PBS is strengthened after radiation.