聚乳酸(PLA)/三醋酸甘油酯(TAc)的结晶性能研究  

Crystallization properties of PLA/TAc blends

作　　者：胡晓方[1] 陈利军[1] 刘海[1] 周玉惠[1] 孙艳斌[1] 伍冬瑞[1] 

机构地区：[1]湖北大学材料科学与工程学院,武汉430062

出　　处：《胶体与聚合物》2008年第1期12-14,22,共4页Chinese Journal of Colloid & Polymer

摘　　要：用三醋酸甘油酯(TAc)增塑聚乳酸(PLA),研究了TAc对PLA在不同温度结晶时的结晶性能的影响。随着TAc的添加,PLA的结晶度与其球晶生长速率逐渐增加,断裂伸长率增大,抗张强度降低。TAc的最佳添加量为25%。研究不同温度等温结晶时PLA/TAc的机械性能以及晶体形态的影响,发现结晶温度升高,PLA/TAc的球晶生长速率减小,抗张强度增大,断裂伸长率降低。The effects of the mass contents of TAc on the properties of crystallites was studied. The results indicated that the addition of TAe made the erystallinity, spherulite growth rate and elongation at break increased at the same crystallization temperature, while tensile strength of the blends decreased. The erystallinity and elongation at break reached the max values when TAe content was 25%. Investigation suggested that the crystallization temperature was another effect for PLA/TAe blends. The tensile strength and spherulite growth rate decreased when the crystallization temperature increased, while elongation at break increased.

关 键 词：聚乳酸 三醋酸甘油酯 等温结晶 球晶生长速率 

分 类 号：TQ225.241[化学工程—有机化工] TQ325.14