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首页> 外文期刊>Journal of Applied Polymer Science >Crystallization Behavior and Morphology of Poly(lactic acid) with a Novel Nucleating Agent
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Crystallization Behavior and Morphology of Poly(lactic acid) with a Novel Nucleating Agent

机译：新型成核剂对聚乳酸的结晶行为和形貌的影响

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摘要

To improve the crystallization ability of poly(lactic acid) (PLA), a novel nucleating agent with a benzoyl hydrazine compound was used in this study. The crystallization behaviors of PLA/talc and PLA/bibenzoylhydrazinepropane (BBP) with or without poly(ethylene glycol) (PEG) were investigated with differential scanning calorimetry (DSC) and polarized optical microscopy. The DSC curves showed that the crystallization temperature and crystallinity of PLA/BBP (PBBP) was higher than that of PLA/talc. With the addition of PEG, a synergistic effect was found. According to the results of nonisothermal crystallization kinetics, the values of F(T) of PBBP(0.5)PEG(5) were usually smaller than those of PTa(3)PEG(5), so the nucleation efficiency of BBP was much better than that of talc. From a polarized optical microscopy photo, it was easy to determine that the nucleation density of BBP was higher than that of PTa(3)PEG(5), and the spherulitic diameter increased linearly with the crystallization time no matter the impingements. The spherulitic growth rate of PBBP(0.5)PEG(5) was faster than that of PTa(3)PEG(5), and the induction time of PBBP(0.5)PEG(5) was the shortest among all of the samples. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41367.
机译：为了提高聚乳酸（PLA）的结晶能力，本研究中使用了一种具有苯甲酰基肼化合物的新型成核剂。用差示扫描量热法（DSC）和偏振光学显微镜研究了有/无聚乙二醇（PEG）的PLA /滑石和PLA /联苯甲酰肼丙烷（BBP）的结晶行为。 DSC曲线表明，PLA / BBP（PBBP）的结晶温度和结晶度高于PLA /滑石。通过加入PEG，发现了协同作用。根据非等温结晶动力学的结果，PBBP（0.5）PEG（5）的F（T）值通常小于PTa（3）PEG（5）的F（T）值，因此BBP的成核效率比滑石粉。从偏振光学显微镜照片，很容易确定BBP的成核密度高于PTa（3）PEG（5），并且无论碰撞如何，球体直径均随结晶时间线性增加。在所有样品中，PBBP（0.5）PEG（5）的球状生长速率都比PTa（3）PEG（5）快，并且PBBP（0.5）PEG（5）的诱导时间最短。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41367。

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