Preparation and mechanical properties of polypropylene/clay nanocomposites for automotive parts application

✍ Scribed by Chae Hwan Hong; Young Bum Lee; Jin Woo Bae; Jae Young Jho; Byeong Uk Nam; Tae Won Hwang

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 172 KB
• Volume: 98
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.21800

✦ Synopsis

Abstract

Nanocomposites of polypropylene with organically modified clays were compounded in a twin‐screw extruder by a two‐step melt compounding of three components, i.e., polypropylene, maleic anhydride grafted polypropylene (PP__g__MA), and organically modified clay. The effect of PP__g__MA compatibilizers, including PH‐200, Epolene‐43, Polybond‐3002, and Polybond‐3200, with a wide range of maleic anhydride (MA) content and molecular weight was examined. Nanocomposites' morphologies and mechanical properties such as stiffness, strength, and impact resistance were investigated. X‐ray diffraction patterns showed that the dispersion morphology of clay particles seemed to be determined in the first compounding step and the further exfoliation of clays didn't occur in the second compounding step. As the ratio of PP__g__MA to clay increased, the clay particles were dispersed more uniformly in the matrix resin. As the dispersibility of clays was enhanced, the reinforcement effect of the clays increased; however, impact resistance decreased. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 427–433, 2005