聚乳酸(PLA)是一种可生物降解、环境友好型的热塑性脂肪族聚酯,废弃后可以完全降解,降解产物为CO2和H2O,能够维持自然界的碳循环平衡.但在常温下,PLA的性能较脆,冲击强度较低,提高其韧性对于拓宽PLA的应用范围是至关重要的.文中对近三年来国内外研究者通过共混、共聚、成型加工、纳米复合和木/塑复合等方法和途径对PLA进行增韧改性的研究进行了综述,并展望了PLA类可生物降解高分子材料的发展前景.
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