光学纯度对聚左旋乳酸结晶与熔融行为的影响

引用本文: 项盛, 邵俊, 冯立栋, 李杲, 陈学思, 边新超, 刘凤岐. 光学纯度对聚左旋乳酸结晶与熔融行为的影响[J]. 应用化学, 2016, 33(8): 887-893. doi: 10.11944/j.issn.1000-0518.2016.08.150423 shu

Citation: XIANG Sheng, SHAO Jun, FENG lidong, LI Gao, CHEN Xuesi, BIAN Xinchao, LIU Fengqi. Effect of Optical Purities on the Crystallization and Melting Behaviors of Poly(L-lactic acid)[J]. Chinese Journal of Applied Chemistry, 2016, 33(8): 887-893. doi: 10.11944/j.issn.1000-0518.2016.08.150423 shu

光学纯度对聚左旋乳酸结晶与熔融行为的影响

项盛 ^a,b, ,
邵俊 ^c, ,
冯立栋 ^a, ,
李杲 ^{a,
,} ,
陈学思 ^a, ,
边新超 ^a, ,
刘凤岐 ^d,

1.
a 中国科学院长春应用化学研究所, 生态环境高分子材料重点实验室长春 130022;
2.
b 中国科学院大学北京 100049;
3.
c 江西师范大学化学化工学院南昌 330027;
4.
d 吉林大学化学学院长春 130012

通讯作者: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

基金项目:
国家自然科学基金项目资助（51303176,51403089,51573178）

摘要: 通过示差扫描量热仪（DSC）和广角X射线衍射仪（WAXD）研究了聚左旋乳酸（PLLA）的光学纯度（91.6%、93.3%、94.0%、97.0%、98.4%）对聚乳酸结晶和熔融行为的影响。在非等温结晶过程中，随着光学纯度的提高，聚乳酸的结晶峰值温度、熔点、熔融焓均提高。在等温结晶过程中，PLLA的半结晶时间（t_1/2）随着光学纯度的增加而减少，在结晶温度100~110 ℃区间内半结晶时间均达到最小值；含有不同光学纯度PLLA的Avrami指数n≈3，表明光学纯度的变化不能改变聚乳酸以三维球晶生长的异相成核机理。随着光学纯度的增加，聚乳酸δ-晶型转变为α-晶型的临界温度升高。聚乳酸的结晶和熔融行为对光学纯度具有依赖性。

关键词:

聚左旋乳酸
/ 光学纯度
/ 结晶

English

Effect of Optical Purities on the Crystallization and Melting Behaviors of Poly(L-lactic acid)

1.
a Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Changchun 130022, China;
2.
b University of Chinese Academy of Sciences, Beijing 100039, China;
3.
c College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China;
4.
d College of Chemistry, Jilin University, Changchun 130012, China

Corresponding author: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

Received Date: 30 November 2015
Fund Project:
国家自然科学基金项目资助（51303176,51403089,51573178）

Abstract: In both nonisothermal and isothermal treatments, crystallization and melting behaviors of poly(L-lactic acid)(PLLA) with different optical purities(91.6%, 93.3%, 94.0%, 97.0%, 98.4%) were investigated by differential scanning calorimetery(DSC) and wide-angle X-ray diffraction(WAXD).With the increase of optical purities of PLLA, the crystallization rate, the melting enthalpy, crystallization temperature and melting point increase. The Avrami index(n) is about 3, indicating a three-dimensional spherulitic growth on heterogeneous nuclei during the isothermal process. The crystalline structure of PLLA is independent on the variation of optical purities of PLLA. However, the critical temperature for crystal formation from δ-form to α-form crystals increases during the isothermal crystallization process with optical purities increasing of PLLA. All the results show that the crystallization and melting behaviors are dependent on the optical purities of PLLA.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

光学纯度对聚左旋乳酸结晶与熔融行为的影响

通讯作者: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

English

Effect of Optical Purities on the Crystallization and Melting Behaviors of Poly(L-lactic acid)

Corresponding author: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

光学纯度对聚左旋乳酸结晶与熔融行为的影响

通讯作者: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

English

Effect of Optical Purities on the Crystallization and Melting Behaviors of Poly(L-lactic acid)

Corresponding author: 李杲,研究员; Tel:0431-85262267; Fax:; E-mail:ligao@ciac.ac.cn; 研究方向:可降高分子材料结晶、加工及应用

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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