高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (3): 551.

• 论文 • 上一篇    下一篇

基板受限条件下聚合物薄膜厚度对结晶的影响研究

王震, 孔祥明, 高峰, 胡平, 谢续明   

  1. 清华大学化工系高分子研究所, 材料研究中心教育部先进材料重点实验室, 北京 100084
  • 收稿日期:2001-11-06 出版日期:2003-03-24 发布日期:2003-03-24
  • 通讯作者: 谢续明(1962年出生),男,博士,教授,主要从事高分子物理化学和聚合物新型材料的研究.E-mail:xxm-dce@mai.ltsinghua.edu.cn E-mail:xxm-dce@mai.ltsinghua.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20174022);重大研究计划“理论物理学及其交叉科学若干前沿问题”子课题(批准号:90103035)资助

The Effect of Polymer Film Thickness on the Polymer Crystallization Restricted on Substrate

WANG Zhen, KONG Xiang-Ming, GAO Feng, HU Ping, XIE Xu-Ming   

  1. Polymer Istitute, Department of Chemical Engineering, Advanced Materials Laboratory of Materials Research Center of Educational Ministry, Tsinghua University, Beijing 100084, China
  • Received:2001-11-06 Online:2003-03-24 Published:2003-03-24

PDF (PC)

被引次数

29

摘要： 通过溶液铸膜方法,用匀胶机(spin-coater)在铝箔基板上制备出一系列具有不同厚度的结晶聚合物聚羟基丁酸酯(PHB)和聚ε-己内酯(PCL)超薄膜.经退火处理后,用差热扫描量热仪(DSC)测试了薄膜厚度对其结晶熔点Tm和结晶温度Tc的影响.结果表明,结晶熔点Tm随超薄膜厚度的减小逐渐减小;在减至一定的厚度时,熔点有突升,至极大值后,随膜厚继续减小熔点又会骤降.而结晶温度Tc则一直随膜厚的减小而逐渐降低.可以认为,结晶聚合物的分子在基板受限作用下,主要是熔融熵的变化导致了熔点的上述变化,而受限条件下的扩散控制结晶使结晶温度降低.

关键词: 聚合物超薄膜, 厚度, 熔点, 结晶温度

Abstract: The study of thermal behavior of the crystalline polymer ultra-thin films was carried out in this paper. We focused on the effect of the thickness of the ultra-thin films on the melting temperature Tm and the crystallization temperature Tc. The ultra-thin films were made by means of spin-coater. The thicknesses of the films vary from about 20 nm to over 1 500 nm. The Tm and Tc of the ultra-thin films were measured by using differential scanning calorimetry(DSC). The results show that with the decrease of the film thickness, the Tm of PHB thin films first decrease gradually and then rise dramatically in a specific range, finally with further decreases of film thickness Tm decrease again sharply and the crystallization temperature Tc descended. The thermal behavior of the thickness of the ultra-thin films is discussed under a restrained condition.

Key words: Polymer ultra-thin film, Thickness, Melting point, Crystallization temperature

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