Crystallization Behavior of Biodegradable Poly(L-lactide)/Multiwalled Carbon Nanotubes Nanocomposites From the Amorphous State
Crystallization Behavior of Biodegradable Poly(L-lactide)/Multiwalled Carbon Nanotubes Nanocomposites From the Amorphous State
复制标题
可生物降解的聚(L-丙交酯)/多壁碳纳米管纳米复合材料的非晶态结晶行为
DOI：
10.1002/pen.21933
复制
发表时间：
2011-08-01
影响因子：
3.2
通讯作者：
Yang, Wantai
中科院分区：
文献类型：
--
作者：
Zhao, Yuanyuan;Qiu, Zhaobin;Yang, Wantai
Crystallization behavior of biodegradable poly(L-lactide) (PLLA) and its nanocomposites at different carboxyl-functionalized multiwalled carbon nanotubes (f-MWNTs) contents from the amorphous state was studied in detail in this work. For the isothermal cold crystallization, the presence of f-MWNTs enhances the isothermal cold crystallization of PLLA in the nanocomposites compared with that of neat PLLA at the same crystallization temperature; moreover, the overall cold crystallization rate of PLLA increases with increasing the f-MWNTs content in the PLLA matrix while the crystallization mechanism does not change. For the nonisothermal crystallization, the f-MWNTs also accelerate the crystallization process of PLLA. In addition, the activation energies of nonisothermal cold crystallization process were calculated using both the Kissinger and Friedman methods. The cold crystallization activation energies of PLLA are higher in the nanocomposites than in neat PLLA, indicating that the addition of f-MWNTs into the PLLA matrix acts as a physical hindrance to retard crystallization. POLYM. ENG. SCI., 51: 1564-1573, 2011. (C) 2011 Society of Plastics Engineers
