有机苯磷酸钙对聚L-乳酸结晶性能和熔融行为的影响  

Effect of calcium phenylphosphonate on crystallization and melting behavior of poly(L-lactic acid)

作　　者：蔡艳华[1] 谢云成[1] 赵莉莎[1] 

机构地区：[1]重庆文理学院环境材料与修复技术重庆市重点实验室,重庆402160

出　　处：《功能材料》2015年第12期12057-12060,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51403027);重庆市自然科学基金资助项目(cstc2012jj A50001);重庆市教委科学技术研究资助项目(KJ131202);重庆文理学院引进人才资助项目(R2013CH11)

摘　　要：为拓宽聚乳酸结晶成核剂范畴,以苯磷酸和氯化钙为原料采用溶液法制备得到层间距为1.544 nm的有机苯磷酸钙(CP),再将其添加到聚L-乳酸(PLLA)基体进行非等温结晶性能和熔融行为研究。非等温结晶性能测试显示CP对PLLA具有异相成核作用,能显著提高其结晶性能;0.7%CP对PLLA的结晶成核效应最佳,在1℃/min的降温速率下,可使PLLA的结晶起始温度从105.88℃增加到115.47℃,结晶焓从1.379 J/g提高到33.90 J/g。熔融行为测试表明PLLA/CP材料的熔融双峰遵循熔融―再结晶机理。In order to prepare more nucleating agents for poly( L-lactic acid)( PLLA),calcium phenylphosphonate(CP) with 1. 544 nm interiamellar spacing was synthesized from phenylphosphonic acid and calcium chloride,and the crystallization and melting behavior of PLLA / CP materials were investigated. Non-isothermal crystallization behavior showed that CP as a heterogeneous nucleating agent could improve the crystallization rate of neat PLLA. Upon the addition of 0. 7% CP,the onset crystallization temperature of PLLA / CP increased from 105. 88 to 115. 47 ℃,and the crystallization enthalpy increased from 1. 379 to 33. 90 J / g. Melting behavior indicated that double melting peaks of PLLA /CP materials resulted from melting-recrystallization.

关 键 词：聚L-乳酸 苯磷酸钙 结晶性能 熔融行为 成核效应 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]