Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (03): 528-535.doi: 10.3866/PKU.WHXB201112202


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
  • Supported by:

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

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