Polyethylene toughened by caco3 particles—percolation model of brittle-ductile transition in hdpe/caco3 blends

✍ Scribed by Qiang Fu; Guiheng Wang

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: English
• Weight: 353 KB
• Volume: 30
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.4990300306

✦ Synopsis

Abstract

The percolation model is used to interpret the brittle‐ductile transition of HDPE/CaCO~3~ blends. The percolation threshold (θ~sc~) for HDPE/CaCO~3~ blends is found to be 0.52, which is equal to π/6. The critical exponent (g) is found to be 0.83 for HDPE/CaCO~3~ blends. The toughening efficiency of blends which have monodisperse, highly asymmetrical particles, strong interphase adhesion and high matrix toughness is greater. The brittle‐ductile transition in polymer blends seems to be a universal percolation phenomenon.