中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (4): 107-110.

• 研究论文 • 上一篇    下一篇

两个不同分子量聚苯乙烯混合体系的玻璃化转变

王佩华1, 安立佳2, 姜炳政2   

  1. 1. 黑龙江省绥化师范专科学校化学系 绥化;
    2. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1994-03-14 修回日期:1994-04-13 出版日期:1994-08-10 发布日期:1994-08-10

On the Glass Transition of Binary Blends of Polystyrene with Different Molecular Weight

Wang Peihua1, An Lijia2, Jiang Bingzheng2   

  1. 1. Department of Chemistry, Suihua Teacher's Training School, Suihua;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022
  • Received:1994-03-14 Revised:1994-04-13 Published:1994-08-10 Online:1994-08-10

PDF

370

被引次数

1

摘要： 用差示扫描热量法测定了两个分子量不同的聚苯乙烯混合体系的玻璃化转变温度随组成的变化,并与Fox方程,Gordon-Taylor方程和Couchman方程的预测结果进行了比较,以验证这些经验方程的适用性。

关键词: 聚苯乙烯, 混合物, 玻璃化转变

Abstract: Blends of polystyrenel(Mw/Mn=1.15,Mw=8.59×l02)and polystyrene-2(Mw/Mn=1.06,Mw=1. 29× 104)in weight ratio of 0,20,40,50,60,80 and 100% were prepared from benzene solution. The cast films of the blend were dried under vacuum at 35℃,40℃,55℃,65℃, 75℃,105℃,and 130℃ for 2 days, respectively. The dependence of the glass transition temperatures on the composition of the blends have been studied by DSC technique. It is found that the experiment results were not fitted with those obtained from the Fox, Gordon-Taylor, and Couchman equations. It appears that the parameter k(or △Cp2/△Cp1)in the mentioned equations, which only refers to the difference in heat capacity of the polymer before and after transition, is not reasonable.

Key words: polystyrene, blend, glass transition temperature

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