物理化学学报 >> 2012, Vol. 28 >> Issue (03): 528-535.doi: 10.3866/PKU.WHXB201112202

热力学,动力学和结构化学 上一篇    下一篇

超支化聚酯对聚乙二醇非等温结晶行为的影响

刘晶如, 徐洁, 董鸿超, 俞强   

  1. 常州大学材料科学与工程学院, 江苏常州 213164
  • 收稿日期:2011-10-20 修回日期:2011-12-12 发布日期:2012-02-23
  • 通讯作者: 刘晶如 E-mail:ruruliu1028@163.com
  • 基金资助:

    国家自然科学基金(20674032)资助项目

Effect of Hyperbranched Polyester on the Non-Isothermal Crystallization Behavior of Polyethylene Glycol

LIU Jing-Ru, XU Jie, DONG Hong-Chao, YU Qiang   

  1. School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, P. R. China
  • Received:2011-10-20 Revised:2011-12-12 Published:2012-02-23
  • Contact: LIU Jing-Ru E-mail:ruruliu1028@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20674032).

摘要: 利用差示扫描量热法(DSC)、偏光显微镜(POM)以及傅里叶变换红外(FTIR)光谱研究了一种超支化聚酯(HBP)对聚乙二醇(PEG)非等温结晶行为的影响, 用Ozawa法、Jeziorny 法和莫志深法对非等温结晶动力学进行了分析. 结果表明: PEG 和HBP/PEG 的非等温结晶过程可用Ozawa 和莫志深动力学方程描述, 与Jeziorny 动力学方程不符; 超支化聚酯的加入改变了PEG的结晶成核和生长机理, 对PEG的结晶有一定的延缓作用. 超支化聚酯中的羰基与PEG的端羟基形成的氢键以及超支化聚酯自身较大的分子体积和高度支化的结构所导致的位阻效应是超支化聚酯延缓PEG结晶的主要原因.

关键词: 聚乙二醇, 非等温结晶, 超支化聚酯, 差示扫描量热法

Abstract: The effect of hyperbranched polyester (HBP) on the non-isothermal crystallization behavior of polyethylene glycol (PEG) was studied by differential scanning calorimetry (DSC), polarizing microscopy (POM), and Fourier transform infrared (FTIR) spectroscopy. The non-isothermal crystallization data for PEG and HBP/PEG were analyzed by the Ozawa, Jeziorny, and Mo Zhi-Shen methods. The results indicate that the non-isothermal crystallization processes of PEG and HBP/PEG may be described using the kinetic equations of Ozawa and Mo, but do not agree with the Jeziorny equation. The addition of HBP affected the crystallization process and crystal form of pure PEG, and slowed the rate of crystallization. The hydrogen bond formed between the carbonyl group of HBP and the terminated-hydroxyl group of PEG, and the larger size and highly branched structure of HBP are the main reasons for the slower crystallization.

Key words: Polyethylene glycol, Non-isothermal crystallization, Hyperbranched polyester, Differential scanning calorimetry

MSC2000: 

  • O643