乙烯-乙烯醇共聚物/尼龙6复合材料的加工流变性能  

Processing rheological properties of ethylene-vinyl alcohol copolymer/nylon 6 composites

作　　者：易著武 刘跃军[1,2] 刘小超[1] 杨坚 李祥刚[1] 范淑红[1] YI Zhu-wu;LIU Yue-jun;LIU Xiao-chao;YANG Jian;LI Xiang-gang;FAN Shu-hong(Key Laboratory of Advanced Packaging Materials and Technology of Hunan Province,Hunan University of Technology,Zhuzhou 412007,Hunan,China;Key Laboratory of Polymer Processing Principle and Applications of Xiamen City,Xiamen University of Technology,Xiamen 361024,Fujian,China)

机构地区：[1]湖南工业大学先进包装材料与技术湖南省重点实验室,湖南株洲412007 [2]厦门理工学院聚合物加工原理与应用厦门市重点实验室,福建厦门361024

出　　处：《材料工程》2021年第8期145-152,共8页Journal of Materials Engineering

基　　金：国家自然科学基金(11872179);湖南省自然科学基金(2018 JJ4072,2020 JJ5137);福建省科技计划项目(2018H6024);湖南省高校创新平台开放基金(18K079);湖南省教育厅科学研究项目(19A138,19B152);湖南省研究生科研创新项目(CX20190842)。

摘　　要：采用熔融共混法制备了乙烯-乙烯醇共聚物/尼龙6(EVOH/PA6)复合材料,用高级毛细管流变仪和旋转流变仪研究了复合材料的加工流变特性。通过幂律模型对EVOH/PA6复合材料的黏度与剪切速率(γ)的关系进行了拟合,并用Arrhenius方程描述了复合材料黏度与温度的关系。结果表明,EVOH/PA6复合材料为假塑性流体,复合材料的表观黏度(ηa)和非牛顿常数(n)随着EVOH添加量的增加而增大。在角频率(ω)扫描范围内,EVOH的加入提高了EVOH/PA6复合材料的储能模量(G′)、损耗模量(G″)和复数黏度|η*|。用Han曲线、Cole-Cole曲线和扫描电子显微镜(SEM)等方法研究发现,EVOH和PA6之间具有较好的相容性。另外,EVOH/PA6复合材料在EVOH的添加量达到15%(质量分数)时形成了微观相分离结构。Ethylene-vinyl alcohol copolymer/nylon 6(EVOH/PA6) composites were prepared by a melt blending method. The processing rheological properties of EVOH/PA6 composites were studied by advanced capillary rheometer and rotational rheometer. The relationship between viscosity and shear rate(γ) of EVOH/PA6 composites were fitted by power law model, and the relationship between viscosity and temperature of composites were described by Arrhenius equation. The results show that the EVOH/PA6 composites are pseudoplastic fluid. Apparent viscosity(ηa) and non Newtonian constant(n) of EVOH/PA6 composites are all enhanced with the increasing contents of EVOH. In the angular frequency(ω) scan range, the storage modulus(G′), loss modulus(G″), and complex viscosity |η*| of EVOH/PA6 composites are enhanced by the addition of EVOH. Han curve, cole-cole curve and scanning electron microscope(SEM) study show that EVOH and PA6 have good compatibility. Furthermore, EVOH/PA6 composite forms a microphase separation structure when containing 15%(mass fraction) EVOH.

关 键 词：尼龙6 乙烯-乙烯醇共聚物 复合材料 流变性能 幂律模型 Arrhenius方程 

分 类 号：TB324[一般工业技术—材料科学与工程]