Rheological behavior of compatibilized and non-compatibilized PA6/EPM blends

被引:44
|
作者
Silva, Jorge [1 ]
Machado, Ana Vera [1 ]
Maia, Joao [1 ]
机构
[1] Univ Minho, Inst Polymers & Composites, Dept Polymer Engn, P-4800058 Guimaraes, Portugal
关键词
polymer blends; compatibilization; interface; nonlinear rheology; PA-6; EPM blends; droplet deformation;
D O I
10.1007/s00397-007-0201-z
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The rheological properties of PA-6/EPM polymer blends, non-compatibilized and compatibilized with grafted ethylene propylene rubber (EPM-g-MA), have been investigated. Linear and non-linear (relaxation both in shear and extension) experiments were realized. Stress relaxation experiments coupled with scanning electron microscopy (SEM) analysis showed the existence of one relaxation time and non-deformed droplets for the immiscible blend, and two relaxation times and deformed droplets for the compatibilized ones, the second relaxation being more pronounced for higher compatibilizer contents. These results clearly indicate that, despite the high viscosity and elasticity ratios, if high amounts of compatibilizer are added to the blend, interfacial slip is suppressed and a high-enough adhesion between the phases is achieved for the high-viscosity dispersed phase to be deformed.
引用
收藏
页码:1091 / 1097
页数:7
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