γ射线辐照改善PBAT增韧的麦秸粉/PBS复合材料性能

Improving properties of wheat straw powder/poly(butylene succinate) composites toughened with poly(butylene adipate-co-terephthalate) by γ-ray irradiation

以聚己二酸-对苯二甲酸丁二醇酯(Poly(butylene adipate-co-terephthalate),PBAT)为增韧材料,利用熔融共混复合技术,制备了生物可降解的麦秸粉/聚对苯二甲酸丁二醇酯(Poly(butylene succinate),PBS)-PBAT复合材料,并对其进行辐照交联。考察PBAT质量分数和^(60)Coγ射线辐照不同吸收剂量对麦秸粉/PBS-PBAT复合材料的热学性能、力学性能和凝胶量的影响。结果表明:当PBAT的质量分数为30%时,麦秸粉/PBS-PBAT复合材料的冲击强度提高了13%;随吸收剂量的增大,麦秸粉/PBS-PBAT复合材料的力学性能和凝胶含量均得到了提高。麦秸粉/PBS-PBAT复合材料经^(60)Coγ射线辐照后,完全热分解温度达到550°C,提高了约50°C。

The biodegradable wheat straw powder/PBS [poly （butylene succinate）]-PBAT [poly （butylene adipate-co-terephthalate）] composites were prepared by melt-blending, wherein PBAT served as the toughening material. The composites were then subjected to γ-ray irradiation. The effects of PBAT content and different absorbed doses of 60Co γ-ray irradiation on the thermal properties, mechanical properties, and gel content of the wheat straw powder/PBS-PBAT composites were studied. The results showed that the impact strength of the composite increased by 13% when the mass fraction of PBAT was 30%. The mechanical properties and gel content of wheat straw powder/PBS-PBAT improved with increasing absorbed doses. The complete thermal decomposition temperature of the wheat straw powder/PBS-PBAT composite irradiated by 60Co γ-rays was 550℃, which increased by 50℃ or so.