PET/LCP共混物的流变行为及其形态

被引：2

作者：

潘利华

梁伯润

机构：

[1] 中国纺织大学材料科学与工程学院

来源：

中国纺织大学学报 | 1998年 / 04期

关键词：

聚对苯二甲酸乙二酯; 液晶聚合物; 共混物; 流变性能; 形态结构;

D O I：

暂无

中图分类号：

O373 [非牛顿流体];

学科分类号：

摘要：

就以不同刚性分子链热致液晶聚合物(LCP)为分散相的聚对苯二甲酸乙二酯(PET)共混物在加工温度范围内的流变性能,共混物熔体经过一系列流场发展起来的形态结构以及它们之间的关系进行了分析。研究表明,PET/LCP共混物为切力变稀的非牛顿流体,共混物熔体的粘度介于两种纯组分高聚物熔体之间,并且各组成的流动曲线于γ=600s～-1时相交;LCP熔体粘度对剪切速率的依赖性比PET熔体大;随着LCP含量增加,共混物的粘流活化能下降;LCP材料性质不同,对共混物流变性能将产生不同的影响。当分散相流体粘度大于基体高聚物的熔体粘度时,分散相很难变形;当分散相流体粘度小于基体时,则分散相的形态发展与加工条件有关。

引用

页码：1 / 6

页数：6

共 19 条

[1]

Orientatabliliry of liquid crystal polymers in elongational flow. Kenig S. Polymer Engineering and Science . 1987

[2]

Characteristics of hydroxybenzoic acid- ethylene terephthalate copolymers and their blends with polystyrene, poly- carbonate, and polyethylene terephthalate. Zhuang P, Kyu T and White J L. Polymer Engineering and Science . 1988

[3]

Morphology and mechanical properties of fibers from blends of a liquid crystalline polymer and poly ( ethylene terephthalate). Li J, Silvetstein M, Hiltner A et al. Journal of Applied Polymer Science . 1992

[4]

Orientation development in thermotropic liquid crystal polymers. Ide Y and Ophir Z. Polymer Engineering and Science . 1983

[5]

Dimensional stability of polystyrene /polymeric liquid crystalline blends. Apicells A, lanelli P, Nicodemo L el al. Polymer Engineering and Science . 1986

[6]

Characterization of blends of polypropylene with a semirigid liquid-crystal copolyester. Yongcheng Y, La Mantia F P and Valenza A. European Polymer Journal . 1991

[7]

Polymer liquid crystal. Joseph E G, Wilkes G L and Baird D. . 1984

[8]

Multiphase Flow in Polymer Processing. Han CD. Academic Press . 1981

[9]

Structure Development of fibers from liquid-crystalline PET/60PHB copolyester. Chen G Y, Cuculo J A and Tucker P A. Journal of Polymer Science Part B Polymer Physics . 1988

[10]

Polyblends containing a liquid crystalline polymer. Siegmann A, Dagan A, Kenig S. Polymer . 1985

← 1 2 →