Studies on the preparation of multi-monomer grafted PP by one-step extrusion and the blends with PVC

• Format: Article
• Language: English
• Published: Budapest University of Technology 2008-01-01
• Series: eXPRESS Polymer Letters
• Subjects: Polymer blends and alloys; Multi-monomer grafted; Polypropylene; Poly(vinyl chloride); Compatibility
• Online Access: http://www.expresspolymlett.com/letolt.php?file=EPL-0000464&mi=cd

Firstly, a novel grafted polypropylene (PP) was prepared by one step free-radical melt grafting way in a single-screw extruder. The results were shown that the addition of St to the melt-grafting system as a comonomer could significantly enhance MMA grafting degree onto PP and reduce the degradation of PP matrix by means of FTIR and MFR test, respectively. Then, the extruded multi-monomer grafted PP, as a component, directly blend with poly (vinyl chloride) (PVC), named as gPP/PVC. The corresponding improved compatibility was examined. Comparison with pure PP/PVC blends, due to the addition of gPP, the tensile strengths of gPP/PVC blends increased significantly and the impact strengths were unchanged as those of pure PP/PVC blends. The DSC results also suggested that the compatibility of PP/PVC blends were improved largely.