【摘要】 以聚（3-羟基丁酸-co-3-羟基戊酸酯）（PHBV）作为基体，通过共混聚碳酸亚丙酯（PPC）后进行固相拉伸，制备强韧化PHBV/PPC复合薄膜；通过万能拉伸试验机、小角/广角X射线散射仪、场发射扫描电子显微镜、差示扫描量热仪对共混物进行表征。结果表明，当固相拉伸温度为55℃、拉伸速率为300 mm/min，拉伸倍率为3时，对比未拉伸样品，断裂伸长率提高约为66%，拉伸强度提高约为642.9%。当拉伸倍率为3时，取向度从0.88%提升到38.96%，还有效促进了聚合物的结晶，对PHBV的耐久性产生了正向作用，使得其性能更加稳定，对比未拉伸样品有了明显提升：未拉伸样品的韧性下降95%，固相拉伸3倍的样品的韧性下降46%。更多还原

【Abstract】 The toughened poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)/polypropylene carbonate(PPC) blending films were prepared through solid-phase stretching and then characterized by using universal tensile testing machine, small-angle/wide-angle X-ray scattering instrument, SEM, and DSC. The PHBV/PPC blending films exhibited an increase in elongation at break by about 66 % and in tensile strength by 642. 9 % at a stretching temperature of 55 ℃, a stretching rate of 300 mm/min, and a stretching ratio 3. The degree of orientation of the blending films was increased from 0. 88 % to 38. 96 % at a stretching ratio of 3. This effectively promotes the crystallization of PHBV and generates a positive effect on its durability of PHBV, resulting in more stable performance. The toughness of the unstretched blending film decreased by 94. 8 %, whereas there was only a reduction by 46 % in the toughness of the blending film at a stretching ratio of 3.更多还原