摘要
以马来酸酐（MAH）接枝苯乙烯-（乙烯-丁烯）-苯乙烯共聚物SEBS（SEBS—g—MAH）为增韧剂，有机蒙脱土（OMMT）为增强填料，甲基丙烯酸缩水甘油酯（GMA）为相容剂，采用熔融挤出方法制备了PA6／SEBS—g—MAH／OMMT复合材料。通过力学、毛细管流变性能测试，考察了SEBS—g—MAH、OMMT和GMA对共混物的力学性能及流变性能的影响。结果表明，共混材料能在保持基本强度及模量稳定的情况下提高冲击强度，获得良好的综合力学性能。PA6及其共混物均为假塑性流体，在230—260℃共混材料的非牛顿指数为0，603～0．931，表观黏度随着剪切应力的增加而降低；加入SEBS-g—MAH、OMMT和／或GMA使得PA6的表观黏度增大，黏流活化能降低；在恒定剪切应力下PA6共混物可在较宽的温度范闱内成型加工。
PA6/SEBS-g-MAH/OMMT blends were prepared using melting extrusion technique, with maleated styrene-ethylene/butadiene-styrene triblock copolymers and OMMT served as the toughening agent and reinforcing filler, respectively, and GMA as a compatibilizer for the blends. The influences of SEBS-g- MAH, OMMT and GMA on the mechanical properties and rheological behaviors of the blend were investigated by mechanical and capillary rheology tests. The results showed that the notched impact strength was improved, while the strength and modulus could almost remain unchanged and got good comprehensive mechanical property. Both PA6 and its blends were pseudo plastic fluid, and the non-Newtonian indexes of the blends were 0. 603 - 0.931 at 230 - 260 ℃. The apparent viscosity of the blends reduced with the increase of the shearing stress. Compared with pure PA6, the addition of SEBS-g-MAH, OMMT and/or GMA increased the apparent viscosity and decreased viscous flow activation energy. The blends could be processed over a wide temperature at a constant shearing stress.
出处
《塑料工业》
CAS
CSCD
北大核心
2011年第4期78-81,共4页
China Plastics Industry
