高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (7): 1384.

• 研究简报 • 上一篇    

STVPh/PPC共混体系的分子链运动和相容性研究

丘富荣1, 陈士明1, 谭莉1, 平郑骅2   

  1. 1. 复旦大学分析测试中心;
    2. 复旦大学高分子科学系, 上海 200433
  • 收稿日期:2003-03-28 出版日期:2004-07-24 发布日期:2004-07-24
  • 通讯作者: 陈士明(1944年出生),男,副教授,从事自由基化学研究.E-mail:smchen@fudan.edu.cn E-mail:smchen@fudan.edu.cn

Segment Motion and Miscibility of STVPh/PPC Blend System

QIU Fu-Rong1, CHEN Shi-Ming1, TAN Li1, PING Zheng-Hua2   

  1. 1. Center of Analysis and Measurement;
    2. Department of Macromolecular Science, Fudan University, Shanghai 200433, China
  • Received:2003-03-28 Online:2004-07-24 Published:2004-07-24

PDF (PC)

被引次数

11

摘要： 聚合物共混是制备新材料的有效方法,共混物的相容性是影响材料性能的决定性因素.研究表明,共混物中引入氢键能增加组分聚合物间的相容性.聚碳酸异丙烯[Poly(propylene carbonate),PPC]是一种新材料,它合成经济,且能生物降解,但PPC的低玻璃化转变温度和非晶性使其实际应用受到很大限制.若将PPC与其它聚合物共混制备成高分子共混物,能有效获得新性能.

关键词: 电子自旋共振, 自旋探针, 链运动, 相容性, 溶度参数

Abstract: The polymer-polymer interaction parameters of STVPh/PPC blends were calculated by Hildebrand solubility parameter. Accordingly the miscibility of the blends was predicted. The segment motion and miscibility of blends were also investigated by electron spin resonance(ESR) spin probe method. ESR spectra were measured as a function of temperature and the hydroxyl content in STVPh. For all blends, two spectral components with different rates of motion, a "fast" and a "slow" component were observed. This result showed that the nitrooxide radical existed in two different matrixes, a more flexible PPC-rich and a more rigid STVPh-rich micro domain. In addition, T 5mT and rotational correlation time τ c and activation energy E a were obtained from ESR spectra, which indicated the hydrogen bonding between the carbonyl and ether oxygen in PPC and the hydroxyl in STVPh was enhanced with increasing the hydroxyl content in STVPh.

Key words: ESR, Spin probe, Segment motion, Miscibility, Solubility parameter

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