| 星形聚苯乙烯的玻璃化转变温度和液1-液2松弛 |
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| 引用本文： | 汪健,刘景江,杨梅林,沈家骢. 星形聚苯乙烯的玻璃化转变温度和液1-液2松弛[J]. 高等学校化学学报, 1987, 8(3): 273 |
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| 作者姓名： | 汪健 刘景江 杨梅林 沈家骢 |
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| 作者单位： | 吉林大学化学系 |
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| 摘 要： | 用扭辫仪(TBA)和线膨胀仪测定了一组规则的星形聚苯乙烯的玻璃化转变温度Tg和Tll松弛。两种实验方法的结果表明:支链分子量相同的星形结构聚合物的Tg随着支化度增加而升高,但也发现星形聚苯乙烯的Tg却低于具有相同分子量的线形聚苯乙烯的Tg·液1-液2松弛温度Tll和损耗峰的强度也依赖其支化度。与以二乙烯基苯为凝胶核的星形结构相比较,证实了后者的双Tg转变。
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| 收稿时间： | 1985-10-12 |
The Glass Transition Temperature and Liquid 1-Liquid2Relaxation of Star-Shaped Polystyrene |
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| Wang Jian,Liu Jingjiang,Yang Meilin,Shen Jiacong. The Glass Transition Temperature and Liquid 1-Liquid2Relaxation of Star-Shaped Polystyrene[J]. Chemical Research In Chinese Universities, 1987, 8(3): 273 |
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| Authors: | Wang Jian Liu Jingjiang Yang Meilin Shen Jiacong |
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| Affiliation: | Department of Chemistry, Jilin University, Changchun |
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| Abstract: | The glass transition temperature Tgand T11relaxation of a series of regular star-shaped polystyrenes were measured by tortional braid analyzer(TBA) and linear dilatometer. The results show that the Tgof star-shaped polymer increases with increasing branching degree when the molecular weights of branch chains are the same, but it is lower than that of linear polystyrene of the same molecular weight. The liquid1-liquid2relaxation temperatue T11and the strength of loss peak of star polystyrene also depend on branching degree. Two-Tgtransitions in star polystyrenes with DVBmicrogel nodule were proved by comparing two type of star polystyrenes. |
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