Preparation and Performance Study of PC/ABS Blends
Using styrene maleic anhydride copolymer(SMA)grafted onto silica nanoparticles,polycarbonate/acrylonitrile butadiene styrene copolymer(PC/ABS)blends were prepared by a two-step method,and the effect of SMA copolymer on the coefficient of thermal expansion(CTE)and impact strength of PC/ABS blends was investigated.The results showed that the addition of SMA copolymer resulted in a decrease in the flowability of PC/ABS blends,while their heat resistance was enhanced.Meanwhile,with the increase of SMA content,the CTE of PC/ABS blends decreased to varying degrees compared to S0,among which the CTE of S1,S2,S3 and S4 respectively decreased by 19.8%,44.5%,43.1%,and 41.4%compared to S0.The addition of SMA copolymer effectively improved the LOI value of PC/ABS composites,with S2 sample having the highest LOI value of 28.8%,and the UL-94 measurement result was V-0,with no dripping observed.In addition,with the increase of SMA copolymer content,the tensile strength of PC/ABS blends shows a trend of first increasing and then slightly decreasing,the bending strength shows a trend of first increasing and then stabilizing,the elongation at break shows a trend of first decreasing and then stabilizing,and the notch impact strength shows a continuous upward trend.Among them,the S2 sample has the highest tensile strength,bending strength,and high notch impact strength,with values of 41.6 MPa,102.4 MPa,and 15.3 J/m2,respectively,which are 29.6%,10.7%,and 1.35 times higher than the corresponding parameters of the S0 sample.
PolycarbonateAcrylonitrile butadiene styreneCoefficient of thermal expansionImpact strength
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维普
