Yield behavior of polypropylene filled with CaC03 and Mg(OH)2. I: “Zero” interfacial adhesion

✍ Scribed by Josef Jančář; Jaroslav Kučera

• Publisher: Society for Plastic Engineers
• Year: 1990
• Tongue: English
• Weight: 493 KB
• Volume: 30
• Category: Article
• ISSN: 0032-3888
• DOI: 10.1002/pen.760301203

✦ Synopsis

Abstract

The composition dependence of tensile yield stress (σ~yc~), and the effects of filler particle shape and surface treatment were investigated for polypropylene (PP) filled with CaCO~3~ or with Mg(OH)~2~. Poor adhesion between PP and CaCO~3~ accounted for a decrease of σ~yc~ with increasing σ~f~. In spite of the poor adhesion between PP and Mg(OH)~2~, σ~yc~ either slowly decreased with increasing V~f~ or remained constant up to V~f~ = 0.25. Surface treatment of the fillers facilitated better dispersion in PP. On the other hand, σ~yc~ was reduced due to the lower thermodynamic work of adhesion (W^A^). The semiempirical one‐parameter equation proposed by Turczanyi, Pukanszky, and Tüdüs (TPT) was considered plausible and was employed in the study of the effects of matrix‐filler interaction.