Structure and Properties of CSW/POE-g-MA/PA6 Ternary Composites
SUN Wenkui1, ZHOU Song1, MA Junhui2, YAN Kehua1, WANG Jun1, CHEN Hao1
1 School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500; 2 Chengdu Institute of Product Quality Inspection Co.,Ltd, Chengdu 610015;
Abstract: Maleic anhydride grafted polyethylene-octene copolymer (POE-g-MA) was used to toughen calcium sulfate whis-ker/nylon 6 (CSW/PA6) composites, and mechanical, thermal, morphological properties and processing performance of CSW/PA6 and CSW/POE-g-MA/PA6 composites were studied. The results indicated that the addition of appropriate CSW could increase both the stiffness and toughness of PA6. Compared with those of pure PA6, tensile strength, flexural strength, flexural modulus and notched impact strength of 10%CSW/PA6 composites increased by 7.5%,9.1%,21.1% and 11.6%, respectively. However, when CSW content increased to 30%, the impact strength of PA6 decreased significantly. The presence of POE-g-MA promoted the homogeneous distribution of CSW in PA6 matrix, also enhanced the interfacial adhesion between CSW and PA6, resulting in significant improvement of impact strength of CSW/PA6 (30/70) composites. Due to the synergistic effect of CSW and POE-g-MA, the notched impact strength and flexural modulus of CSW/POE-g-MA/PA6 (30/5/65) composites increased by 36.8% and 22.1% compared with pure PA6, and its tensile and flexural strength were close to those of pure PA6.
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2017, Vol. 31 
