Preparation of polypropylene-graft-cardanol by reactive extrusion and its composite material with bamboo powder

• Published in: Journal of applied polymer science Vol. 115; no. 2; pp. 1160 - 1167
• Main Authors: Chen, Qinhui, Xue, Hanyu, Lin, Jinhuo
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.01.2010; Wiley
• Subjects: Applied sciences; Bamboo; composite; Composite materials; Composites; Contact angle; Exact sciences and technology; Extrusion; Forms of application and semi-finished materials; graft copolymers; Grafting; Linearity; MFI; poly(propylene) (PP); Polymer industry, paints, wood; Polypropylenes; reactive extrusion; Reproduction; Spectrometers; Technology of polymers; reactive extrusion; Propylene polymer; Fiber reinforced material; graft copolymers; Plant fiber; Mechanical properties; Dispersion reinforced material; Tensile property; Experimental study; Melt index; Composite material; Chemical modification; poly(propylene) (PP); Natural fiber; Preparation; composite; Concentration effect; Plant origin; Addition reaction; Reaction mechanism; Phenols; Olefin polymer; Bamboo; Rheological properties
• ISSN: 0021-8995; 1097-4628; 1097-4628
• DOI: 10.1002/app.31227

The polypropylene-graft-cardanol was prepared by reactive extrusion, which is solvent-free melt process, continuous processing, and controllable over residence time. The effect of monomer and initiator concentration on grafting ratio, grafting efficiency, and melt flow index (MFI) was also studied. The yield was quantified by UV-vis spectrometer. The chemical structure was investigated by infrared spectroscopy and gel ratio. A possible mechanism was supposed. The particular structure of cardanol can retain the MFI value of matrix resins and prevent polypropylene (PP) from being decomposed. The grafting ratio could be easily obtained from an experimental formula deduced from the linearity relationship between grafting ratio and MFI. The effect of cardanol grafted onto PP on the compatibility of PP and bamboo powder was studied by contact angle measurements, scanning electron microscopy, and tensile properties test.