摘要
根据聚丁二烯的在其玻璃化转变Ｔ８≈１７８Ｋ附近的比热，研究其在弛豫过程中释放能量△Ｑ随其物理老化时间Ｔｗ的关系，发现△Ｑ（ｔｗ）满足Ｋｏｈｌｒａｕｓｃｈ—Ｗｉｌｌｉａｍｓ—Ｗａｔｔａ关系：其中Ｑ０＝２．３１Ｊ·ｇ－１；τ＝９３ｍｉｎ；β＝０．６０．同时结合聚丁二烯的微观结构用分维时间模型解释了实验结果．
The relationship between the released energy △Q of polybutedien in the relaxation process during its physical aging procedure and the aging time tw is investigated according to its specific heat around the glass transition temperature T8≈ 178K. It is found that △Q(tw) can be described by Kohlrausch - Williams - Watts law with Q0=2.31J.g-1, τ=93min, β=0.60. Fractal time model is utilized to explain the experimental results according to the microscopic structure of polybutadien.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1996年第1期82-86,共5页
Journal of Tongji University:Natural Science
基金
国家教委博士点基金
上海市启明星基金
关键词
玻璃
聚丁二烯
驰豫过程
分维时间模型
Specific heat
Phase transition
Metastable state
Relaxation
tractal time model
