Gloss modeling of injection molded rubber-modified styrenic polymers

摘要

Gloss models were developed through statistical experimental design for several ABS (acrylonitrile butadiene styrene) and HIPS (high impact polystyrene) materials that span Dow's portfolio of rubber-modified styrenic polymers. The purpose of this work was to benchmark the gloss performance across the portfolio and quantify the influence of molding conditions on the gloss of injection molded parts. Six processing parameters were included in the experimental design: T{sub}(melt), T{sub}(mold), t{sub}(frill), t{sub}(hold), t{sub}(cool) and P{sub}(cavity). A description of the experimental protocol employed for this statistically designed experiment will be given. For the purpose of this communication, the discussion of the results will focus on the observations obtain from three types of ABS materials: emulsion (E-ABS), mass (M-ABS), and a newly developed high gloss mass ABS (HGM-ABS).