Non-isothermal crystallization behaviors and spherulitic morphology of poly(lactic acid) nucleated by a novel nucleating agent

被引：51
|
作者：
Li, Chenglang [1 ]
Dou, Qiang [1 ]
Bai, Zhifei [1 ]
Lu, Quliang [2 ]
机构：
[1] Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 210009, Jiangsu, Peoples R China
[2] Southeast Univ, Coll Chengxian, Nanjing 210088, Jiangsu, Peoples R China
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2015年 / 122卷 / 01期
关键词：
Poly(lactic acid); Nucleating agent; Crystallization; Morphology; Non-isothermal crystallization kinetics; POLY(L-LACTIC ACID); EPITAXIAL CRYSTALLIZATION; HETEROGENEOUS NUCLEATION; ISOTACTIC POLYPROPYLENE; BIODEGRADABLE POLYESTERS; POLYMER CRYSTALLIZATION; CRYSTAL-STRUCTURE; CARBON NANOTUBES; KINETICS; FORM;
D O I：
10.1007/s10973-015-4677-y
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of cadmium phenylmalonate (PMA-Cd) as a novel nucleating agent on the crystallization behaviors and spherulitic morphology of poly(lactic acid) (PLA) as well as non-isothermal crystallization kinetics of the nucleated PLA were studied by means of differential scanning calorimetry and polarized light microscopy. The results showed that PMA-Cd served as an effective nucleating agent to accelerate the crystallization rate of PLA. The presence of PMA-Cd significantly increased the number and decreased the size of the spherulites. The non-isothermal crystallization kinetics of the nucleated PLA was well described by Mo's model. The activation energies (Delta E) of non-isothermal crystallization were calculated by Kissinger's method. The crystallization rate of PLA/0.5 % PMA-Cd sample was faster than that of PLA/0.2 % PMA-Cd sample, while the Delta E of the former was greater than that of the latter. The nucleation mechanism between PMA-Cd and PLA was satisfactorily explained by dimensional lattice-matching criterion.
引用
收藏
页码：407 / 417
页数：11
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