| 共聚酯PECT的流变性能研究 |
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| 引用本文： | 李爱香.共聚酯PECT的流变性能研究[J].潍坊学院学报,2009,9(2). |
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| 作者姓名： | 李爱香 |
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| 作者单位： | 山东科技职业学院,山东,潍坊,261053 |
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| 摘 要： | 研究了两组分的共聚酯PECT(聚对苯二甲酸乙二醇-1,4-环己基二甲醇酯)的流变性能。结果表明,ETCT共聚酯的熔体属于非牛顿流体,呈现典型的切力变稀行为。共聚酯的剪切应力随剪切速率的提高而增加,随着温度的提高,剪切应力有所下降。共聚酯熔体粘度随CT链段的引入及含量的增加而上升,同时也随温度的升高而降低。共聚酯熔体的粘流活化能均大于常规PET,加入第二组份的量越大,共聚酯粘流活化能、表观粘度上升越明显。共聚酯熔体的非牛顿指数n值均低于常规PET,且随温度的升高而增大。考查温度和剪切速率等流变参数对共聚酯流变性能的影响,可以在加工过程中合理地控制工艺,对工艺条件的设定有很好的指导作用。
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| 关 键 词： | 聚对苯二甲酸乙二醇-1 4-环己基二甲醇酯(PECT) 共聚酯 流变 |
Study on Rheological Behaviour of Poly(ethylene terethphlate- co- cyclohexanedimethyllene terephthalate) |
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| LI Ai-xiang.Study on Rheological Behaviour of Poly(ethylene terethphlate- co- cyclohexanedimethyllene terephthalate)[J].Journal of Weifang University,2009,9(2). |
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| Authors: | LI Ai-xiang |
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| Institution: | LI Ai-xiang(Shandong Vocational College of Science & Technology; Weifang 261053; China); |
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| Abstract: | Poly(ethylene terephthalate-co-1,4-cylclohexylenedimethylene terephthalate)(PECT) has different properties due to various molar ratios of components.In this paper,the rheological behaviour of the copolyesters indicated that PECT copolyesters exhibited typical pseudoplastic behavior.The apparent viscosities of copolyester melts declined and the shear stress increased with the increase of shear rate.And,the shear stress decreased with the increase of temperature.The viscosity of the copolyester melt increased... |
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| Keywords: | poly（ethylene terephthalate-co-1 4-cylclohexylenedimethylene terephthalate）（PECT） copolyester rheological behaviour |
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