Structure And Properties Of AES/PC Blends Compatibilized By EPDM-g-MAH Copolymer

Acrylonitrile-EPDM-styrene(AES) resin for acrylonitrile-butadiene-styrene(ABS) resin poor weather resistance and the development of new products. AES resin and ABS resin as continuous use temperature is not high, the defects of low thermal deformation temperature. AES resin with polycarbonate(PC) blend was prepared AES/PC blend is to improve the AES resin thermal deformation temperature of a kind of simple and feasible method. But the PC is poorer, compatibility with EPDM phase in the AES has good compatibility with SAN phase. So AES/PC blend compatibility is also affected by AES rubber content in the resin. This article uses EPDM grafted maleic anhydride copolymer(EPDM-g-MAH) as a compatibilizer, through in the twin screw extruder with AES/PC blend melt blending to the AES/PC blend modification for the purpose of their capacities. Inspect rubber content on the structure and performance of AES/PC blend, and compatibilizers EPDM-g-MAH composition and content of different rubber content of AES/PC(70/30) blend related performance(infrared characteristic, thermodynamic properties, microscopic phase morphology, mechanical properties, interfacial characteristics, the rheological properties).AES resin of different rubber content structure and performance study shows that with the increase of rubber content, the rubber phase by dispersed gradually reunion, continuous, eventually form a continuous phase. The increase of rubber content can make AES resin tensile strength and bending strength and thermal deformation temperature increase gradually, gradually increased while the impact strength within a certain range. For different rubber content of AES/PC blend structure observation found that within a certain range, with the increase of rubber content in the blend, the PC in the dispersion of AES matrix variation; When rubber phase to form continuous phase into a PC/SAN blend structure and rubber into phase structure, respectively. Blend the tensile strength and bending strength decreased with increasing rubber content, the impact strength increased.With EPDM-g-MAH and AES/PC blend melt blending with the expanded. Blend and compatibilizing blend infrared test results show that in the process of melt blending, EPDM-g-MAH anhydride functional group open loop with PC molecular chains of hydroxy reaction generated at the end of the PC-g-MA-co-EPDM copolymer. Expansion after the test results show that the structure and performance of blend a certain amount of EPDM-g-MAH join can make rubber blend with low content of dispersed phase particle size small, uniform dispersion, interface layer thickness increases; But you can’t make rubber blend with high content of dispersed particle size decreases. Expansion blend performance before and after the test results show that a certain amount of EPDM-g-MAH can make the rubber content in the blend of low tensile and bending strength good, while the impact strength increased significantly, complex viscosity and storage modulus, loss modulus increased; But the EPDM-g-MAH cannot make high rubber content of blend performance improvements. The addition of EPDM-g-MAH on AES/PC blend has a little influence on the thermal deformation temperature.