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60Coγ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60Coγ射线辐照后,完全热分解温度达到550℃,提高了约50℃.%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 of60Coγ-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 by60Coγ-rays was 550 ℃, which increased by 50 ℃ or so.
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