摘要
利用差示扫描量热仪(DSC)研究了3种稀土成核剂[WBG-Ⅱ、WBG-Ⅱ(a)与WBG-Ⅱ(b)]对聚乳酸(PLA)的影响。非等温结晶动力学分析表明:添加成核剂后在相同的降温速率下结晶发生的温度区间比纯PLA高11～15℃,其中WBG-Ⅱ(b)在10℃/min的降温速率下可以将PLA的结晶温度由109.2℃提高到124.1℃,结晶诱导时间tinc由8.43 min减少到6.55 min,说明可以作为1种有效的PLA成核剂。
Three different kinds of rare-earth nucleating agents [ WBG- II , WBG- II （a） and WBG- II（b） ] added into Poly（lactide acid）（PLA） were investigated via differential scanning calorimetry （DSC）. The non-isothermal crystallization kinetics analysis showed the temperature of crystallization range was increased by 11 - 15 ℃ with the presence of nucleating agents under all the studied cooling rates,which WBG-II（b） increased the crystallization temperature from 109.2 ℃ to 124. 1 ℃ and shortened the incubation crystallization period tinc from 8.43 min to 6.55 min under the cooling rate of 10 ℃/min. The calculation of non-isothermal activation energy and nucleation activity revealed a higher crystallization rate after the addition of nucleating agents,could be an effective nucleating agent for PLA.
出处
《塑料》
CAS
CSCD
北大核心
2013年第2期111-114,共4页
Plastics
关键词
聚乳酸
稀土成核剂
非等温结晶
活化能
成核活性
poly（ lactide acid ）
rare-earth nucleating agents
non-isothermal crystallization
activation energy
nucleationactivity
