Investigation of polymer blends of polyamide-6 and poly(methyl methacrylate) synthesized by RAFT polymerization
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Morphological and thermal properties of immiscible and incompatible polymer blends of commercial polyamide-6 (PA-6) and poly(methyl methacrylate) (PMMA) synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization have been studied in the presence of a compatibilizer consisting of either a random copolymer of styrene-maleic anhydride (SMA) or a diblock copolymer poly(methyl methacrylate) and polystyrene (PMMA-PS) also synthesized via RAFT polymerization. Blends of PA-6/PMMA were obtained by extrusion mixing. During melt compounding in the extruder, the functional groups of the polymer components were reacted in the presence of a compatibilizer, which changed considerably the morphology of the blend. After compatibilization, particles of PMMA in the PA-6 were smaller and better dispersed. The morphology and thermal properties of the blends were characterized using scanning electron microscopy (SEM) and differential scanning calorimetry (DCS).
KeywordsPolyamide-6 PMMA Compatibilization Morphology
A. A. Khaydarov acknowledges the Royal Society for funding an International Incoming Short Visit to the University of Leeds. PEM thanks the EPSRC and Unilever for the provision of a scholarship. The authors thank Dr John Embery for assistance with the extrusion process.
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