tailieunhanh - Effect of compatibilizer on the morphology and properties of blends containing polypropylene and nylon-6

Polymer blends containing nylon-6 and polypropylene (PP) were prepared by using a single screw extruder. Three different types of maleic anhydride modified PP (PPMA06, PPMA1and PPMA05) were used as compabilizers to examine their effects. The properties included tensile strength, Izod impact strength, torque rheometry and extent of water absorption of the resulting blends were measured and the morphology was characterized by using scanning electron microscope (SEM). The crystallization behavior of blends was analyzed by monitoring differential scanning calorimetry (DSC), X-ray diffraction. It seemed that blends compatibilized with PPMA06 exhibited the most homogeneous phase morphology and superior properties among the three. | Journal of Chemistry Vol. 45 5A P. 207 - 213 2007 EFFECT OF COMPATIBILIZER ON THE MORPHOLOGY AND PROPERTIES OF BLENDS CONTAINING POLYPROPYLENE AND NYLON-6 Received 16 August 2007 TA THI PHUONG HOA vu MINH Duc vu VAN KHIEM Polymer Center Hanoi University of Technology SUMMARY Polymer blends containing nylon-6 and polypropylene PP were prepared by using a single screw extruder. Three different types of maleic anhydride modified PP PPMA06 PPMA1and PPMA05 were used as compabilizers to examine their effects. The properties included tensile strength Izod impact strength torque rheometry and extent of water absorption of the resulting blends were measured and the morphology was characterized by using scanning electron microscope SEM . The crystallization behavior of blends was analyzed by monitoring differential scanning calorimetry DSC X-ray diffraction. It seemed that blends compatibilized with PPMA06 exhibited the most homogeneous phase morphology and superior properties among the three. I - INTRODUCTION Blending of polyamides PA with polypropylene PP has found many applications due to its cost-effective and balanced barrier and mechanical properties. The nylon phase offers high strength and excellent resistance to organic liquids heat abrasion and wear. However its tendency to absorb moisture in equilibrium with the environment usually leads to lowering of modulus and reductions in both dimension stability and impact strength. Polypropylene is characterized by its moisture resistance high elongation-to-break and low costs but it suffers from relatively low strength and poor chemical and heat resistance. The incompatible nature of the two polymers usually is indicated by a two-phase morphology of poor bonding between the consisting polymers and a very wide range of dispersed particle size. In order to induce compatibility between polyamides and polypropylene the approach of introducing a reactive component such as acrylic acid or maleic anhydride modified polypropylene