Effect of melting temperature, coupling agent, and width on properties of ABS+20%PC/Al flake-metallized plastics

Effects of different melting temperatures (270 and 210 degrees C), Al flake widths (0.5 and 0.8 mm), and coupling agents (gamma aminopropyl triethoxy silane A1100 and gamma glycidoxy propyl trimethoxy silane A-187) on the pro perties of ABS + 20%PC/Al flake-metallized plastics are discussed. Accordin g to experiments, it is found that the aspect ratio is larger with the 270 degrees C melting temperature and 0.8 mm Al flake, but declines with the A- 187 coupling agent. The 0.5 mm Al flakes treated with the A-1100 coupling a gent at 270 degrees C melting temperature has better distribution in the ma trix and EMI shielding effectiveness, but has a lower volume resistance. Wi th 0.8 mm Al flakes at 210 degrees C melting temperature, and treatment wit h the A-1100 coupling agent, it produces larger ultimate tensile strength a nd impact strength. There is no relation between HDT and melting temperatur es, Al flake widths, or coupling agents. (C) 2000 John Wiley & Sons, Inc.