对叔丁基杯[4]芳烃包合物对聚乳酸结晶过程的影响

doi:10.11949/j.issn.0438-1157.20150798

化工学报 ›› 2015, Vol. 66 ›› Issue (9): 3762-3768.DOI: 10.11949/j.issn.0438-1157.20150798

• 材料化学工程与纳米技术 • 上一篇下一篇

对叔丁基杯[4]芳烃包合物对聚乳酸结晶过程的影响

石尧麒¹, 辛忠², 陆颖音¹, 周帅¹

1 华东理工大学化工学院, 上海市多相结构材料化学工程重点实验室, 上海 200237;
2 华东理工大学化工学院, 化学工程联合国家重点实验室, 上海 200237

收稿日期:2015-06-02 修回日期:2015-06-23 出版日期:2015-09-05 发布日期:2015-09-05
通讯作者: 辛忠
基金资助:
国家自然科学基金项目(21306047);中央高校基本科研业务费项目(222201314051,22A201514016)。

Study on crystallization of poly (L-lactic acid) nucleated with p-tert-butylcalix[4]arene inclusion complex

SHI Yaoqi¹, XIN Zhong², LU Yingyin¹, ZHOU Shuai¹

1 Shanghai Key Laboratory of Multiphase Material Chemical Engineering, College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
2 State Key Laboratory of Chemical Engineering, College of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2015-06-02 Revised:2015-06-23 Online:2015-09-05 Published:2015-09-05
Supported by:
supported by the National Natural Science Foundation of China (21306047), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (222201314051, 22A201514016).

摘要/Abstract

摘要：

以对叔丁基杯[4]芳烃(tBC4)为主体,甲苯、邻二甲苯、间二甲苯、对二甲苯为客体分子,制备4种tBC4包合物tBC4-t、tBC4-ox、tBC4-mx、tBC4-px。考察了tBC4包合物对左旋聚乳酸(PLLA)结晶性能及结晶形态的影响。结果表明,tBC4包合物能将PLLA的结晶峰值温度(T_p)提高近7℃;进一步研究发现几种包合物在经高温后,客体小分子逃逸,样品均改变为相同的晶体结构,因此对PLLA成核有相同的影响;此外,含有成核剂的PLLA球晶尺寸小于空白PLLA的球晶尺寸,成核剂的加入不改变PLLA球晶生长的方式。

关键词: 聚乳酸, 成核剂, 对叔丁基杯[4]芳烃, 包合物

Abstract:

In this paper, four inclusion complexes were obtained by recrystallizing p-tert-butylcalix[4]arene (tBC4) from toluene, o-xylene, m-xylene and p-xylene. Then, the effects of tBC4 inclusion complexes on crystallization behavior of poly (L-lactic acid) (PLLA) were investigated with differential scanning calorimeter and polarized optical microscopy. The results showed that the crystallization peak temperature of PLLA nucleated by tBC4 inclusion complexes increased 7℃, which indicated that these compounds owned the nucleation ability for PLLA. After suffering high temperature, crystal structures of four inclusion complexes reverted to nearly the same. Therefore, all these inclusion complexes showed the same nucleation ability. Crystallization morphologies of PLLA and nucleated PLLA were studied by means of polarizing optical microscopy, indicating that the addition of nucleating agent can decrease PLLA spherulite size without changing its growth pattern.

Key words: poly lactic acid, nucleating agent, p-tert-butylcalix[4]arene, inclusion complex

中图分类号:

TQ316.6

石尧麒, 辛忠, 陆颖音, 周帅. 对叔丁基杯[4]芳烃包合物对聚乳酸结晶过程的影响[J]. 化工学报, 2015, 66(9): 3762-3768.

SHI Yaoqi, XIN Zhong, LU Yingyin, ZHOU Shuai. Study on crystallization of poly (L-lactic acid) nucleated with p-tert-butylcalix[4]arene inclusion complex[J]. CIESC Journal, 2015, 66(9): 3762-3768.

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对叔丁基杯[4]芳烃包合物对聚乳酸结晶过程的影响

Study on crystallization of poly (L-lactic acid) nucleated with p-tert-butylcalix[4]arene inclusion complex

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