Reactive Extrusion of Polypropylene and Nylon Blends from Commingled Plastic Wastes

• Published in: Macromolecular symposia. Vol. 249-250; no. 1; pp. 485 - 492
• Main Authors: Kim, Gwang Ho, Hwang, Seung Sang, Cho, Bong Gyoo, Hong, Soon Man
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-04-2007; WILEY‐VCH Verlag
• Subjects: Compatibility; Dynamics; Extrusion; interfacial adhesion; Nylons; Polymer blends; Polypropylenes; reactive extrusion; recycling; Rheological properties; rheology; Wastes
• ISSN: 1022-1360; 1521-3900
• DOI: 10.1002/masy.200750424

Reactive extrusion for recycled PP/nylon blends from commingled plastic wastes was investigated through thermal, morphological, mechanical and rheological studies. From SEM investigation, we found improved surface morphologies with homogeneous domains in the recycled 75/25 PP/nylon blends compatibilized with copolymers containing maleic anhydride (MA) as a reactive functional group; SEBS‐g‐MA, PP‐g‐MA, PE‐g‐MA. Especially, SEBS‐g‐MA thermoplastic elastomer which is highly reactive with amine terminal group of nylon, resulted in a large increase of impact strength above nearly 200%. This compatibilization effect resulted from the increase of interfacial adhesion and the reduction of domain size of dispersed phase in PP/nylon blend system. To confirm the existence of this network structure, we measured a dynamic rheological properties.