Yield behavior of PP/CaC03 and PP/Mg(OH)2 composites. II: Enhanced interfacial adhesion

✍ Scribed by J. Jančář; J. Kučera

• Publisher: Society for Plastic Engineers
• Year: 1990
• Tongue: English
• Weight: 604 KB
• Volume: 30
• Category: Article
• ISSN: 0032-3888
• DOI: 10.1002/pen.760301204

✦ Synopsis

Abstract

Effects of the variation of adhesion strength σ~A~ on the tensile yield behavior of particulate filled polypropylene (PP) were investigated. To enhance adhesion of PP toward calcium carbonate (CaCO~3~) and magnesium hydroxide (Mg(OH)~2~), maleated PP (MPP) was added to PP in various ratios. σ~A~ varied from 10‐46 MPa. σ~A~ calculated from the Leidner‐Woodhams model are in good agreement with SEM micrographs of the composite fracture surfaces. Dependences σ~yc~ vs. σ~A~, at constant V~f~ = 0.18, were investigated and analyzed in terms of existing models. Using the Turczanyi, Pukanszky, Tüdös model (TPT) for the PP/CaCO~3~ composite, an effective interlayer “thickness” (t~eff~) and the yield stress of the immobilized PP (σ~yi~) were calculated. Both t~eff~ and σ~yi~ increased with enhancing of the adhesion.