Preparation and Performance Study of PC/ABS Blends

LI Lian-rong, ZHENG Xiao-xi, LIU Yong-chao, JIA Guang-hai, BAI Ling

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (08) : 24-27. DOI: 10.15925/j.cnki.issn1005-3360.2024.08.005
Theory and Research

Preparation and Performance Study of PC/ABS Blends

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Abstract

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.

Key words

Polycarbonate / Acrylonitrile butadiene styrene / Coefficient of thermal expansion / Impact strength

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LI Lian-rong , ZHENG Xiao-xi , LIU Yong-chao , et al . Preparation and Performance Study of PC/ABS Blends. Plastics Science and Technology. 2024, 52(08): 24-27 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.08.005

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