华南理工大学学报(自然科学版) ›› 2008, Vol. 36 ›› Issue (11): 79-84.

• 化学化工 • 上一篇    下一篇

聚己内酯/淀粉共混材料的非等温结晶动力学

苏健裕 陈玲 杨连生 李晓玺 余龙   

  1. 华南理工大学 轻化工研究所/淀粉与植物蛋白深加工教育部工程研究中心, 广东 广州 510640
  • 收稿日期:2008-01-16 修回日期:2008-03-12 出版日期:2008-11-25 发布日期:2008-11-25
  • 通信作者: 苏健裕(1979-),男,博士生,主要从事淀粉化学与改性技术、天然高分子医学应用等研究. E-mail:jysu@scut.edu.cn
  • 作者简介:苏健裕(1979-),男,博士生,主要从事淀粉化学与改性技术、天然高分子医学应用等研究.
  • 基金资助:

    广东省自然科学基金团队项目(05200617);国家自然科学基金国际合作与交流项目(50540420129);武器装备预研基金项目(9140A12060206JW1602)

Nonisothermal Crystallization Kinetics of Polycaprolactone/Starch Blends

Su Jian-yu  Chen Ling  Yang Lian-sheng  Li Xiao-xi  Yu Long   

  1.  Engineering Research Center of Starch and Plant Protein Deep Processing of the Ministry of Education, Research Institute of Light Industry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-01-16 Revised:2008-03-12 Online:2008-11-25 Published:2008-11-25
  • Contact: 苏健裕(1979-),男,博士生,主要从事淀粉化学与改性技术、天然高分子医学应用等研究. E-mail:jysu@scut.edu.cn
  • About author:苏健裕(1979-),男,博士生,主要从事淀粉化学与改性技术、天然高分子医学应用等研究.
  • Supported by:

    广东省自然科学基金团队项目(05200617);国家自然科学基金国际合作与交流项目(50540420129);武器装备预研基金项目(9140A12060206JW1602)

摘要: 以异氰酸酯(MDI)为相容剂,采用共混挤出技术制备不同含量的聚己内酯与淀粉的共混产物(SPCL),通过X射线衍射及DSC研究SPCL的结晶性质和非等温结晶行为,分别用Ozawa法和Mo法对所得数据进行处理.结果表明:随着淀粉含量的增加,SPCL的结晶程度降低;淀粉在SPCL中起到了成核剂的作用,加快了聚己内酯(PCL)的结晶速度,但对PCL的结晶程度起抑制作用.建模结果表明,Ozawa法适于处理纯PCL的非等温结晶行为,但不适于处理SPCL共混物,而Mo法对PCL和SPCL共混物均适用.

关键词: 聚己内酯, 淀粉, 共混材料, 非等温结晶动力学

Abstract:

Starch/polycaprolactone (SPCL) blends with different contents were prepared via the blending extrusion, with methylenediphenyl diisocyanate (MDI) as the compatibilizer. The crystallization and nonisothermal crystallization kinetics of the products were then investigated by means of XRD and DSC. The obtained data were finally analyzed by using Ozawa's and Mo's methods. The results indicate that the crystallization degree of SPCL decreases with the increase of starch content, that the starch acts as a nucleating agent for the nonisothermal crystallization of PCL because it quickens the crystallization although it lowers the crystallization degree. Modeling results show ‘that Ozawa's method is well fit to describe the nonisothermal crystallization of PCL but not that of SPCL, while Mo's method is suitable for both PCL and SPCL.

Key words: polycaprolactone, starch, blend, nonisothermal crystallization kinetics