| 液晶共聚酯酰胺和PET共混物的流变性能 |
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| 引用本文： | 解孝林 吴大诚. 液晶共聚酯酰胺和PET共混物的流变性能[J]. 浙江大学学报(工学版), 1997, 31(4): 562-566 |
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| 作者姓名： | 解孝林 吴大诚 |
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| 作者单位： | 浙江大学高分子科学与工程研究所，四川联合大学轻纺学院 |
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| 摘 要： | 本文采用不同的共混方式——溶液共沉淀法和机械共混法将热致液晶共聚酯酰胺（ＰＥＡ）和聚对苯二甲酸乙二酯（ＰＥＴ）共混，利用Ｉｎｓｔｒｏｎ３２１１型毛细管流变仪研究ＰＥＡ／ＰＥＴ共混物的流变性能．结果表明ＰＥＡ的加入有效地改善了共混物的加工性能，在实验剪切范围内，共混物的流变曲线由低剪切速率下的切力变稀区和表观粘度基本恒定的准牛顿区组成，且溶液共混物的表观粘度相对较高，准牛顿区不明显．共混物的表观粘度对共混组成的依赖性表现出负偏差行为，当ＰＥＡ为１０％时，共混物的表观粘度达到最小值．
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| 关 键 词： | 液晶共聚酯酰胺；聚对苯二甲酸乙二酯；共混物；流变性能 |
Rheological properties of liquid crystalline copolyesteramide/poly (ethylene terephthalate)blends |
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| Xie Xiaolin Shentu Baoqing Li Bogeng Pan Zuren. Rheological properties of liquid crystalline copolyesteramide/poly (ethylene terephthalate)blends[J]. Journal of Zhejiang University(Engineering Science), 1997, 31(4): 562-566 |
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| Authors: | Xie Xiaolin Shentu Baoqing Li Bogeng Pan Zuren |
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| Abstract: | The binary blends of liquid crystalline copolyesteramide(PEA)and poly(ethylene terephthalate)(PET) were prepared by solution precipitation and mechanical mixing. Their rheological properties were investigated by means of Istron 3211 type capillary rheometer.The results show that the viscosity curves of blends consists of two regions: a shear thinning region at low shear rate and a"pseudo Newtonian"region. The processing properties of blends can be improved by adding PEA. In the same composition,the viscosity of blends made by solution precipitation is higher than that of blends made by mechanical mixing, and the former"pseudo Newtonian" region is less obvious than the latter. The viscosities of PEA/PET blends show the negative deviation blends(NDB),and the maximum deviation appears at about 10% of PEA. |
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| Keywords: | blends liquid crystalline copolyesteramide poly(ethylene terephthalate) rheology |
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