【摘要】 在分析聚乳酸热降解链随机断裂机理基础上建立了聚乳酸热降解模型,运用Z变换方法对模型进行了求解,并对聚乳酸的相对分子质量、相对分子质量分布随时间、温度的变化进行了模拟。模拟结果表明,经过1.5 h(200℃),聚乳酸的降解已经基本达到平衡,与文献实验结果吻合。更多还原

【Abstract】 A new theoretical model to predict the thermal degradation of poly(L-lactic acid) was explored. In this model, the variance of both the number-average molecular weight and the molecular weight distribution according to different times and temperatures are discussed. The simulation results proved the efficiency of this new model. At the same time, the mechanism of poly (L-lactic acid) thermal degradation was studied.更多还原