Abstract: The glycidyl methacrylate(GMA) and styrene(St) multi monomers melt grafted PP, PP-g-(GMA-co-St), was used as a reactive compatibilizer of PA6/PCblends in this study. The effect of the addition of PP-g-(GMA-co-St) on compatibility of the blends was investigated. It was found that the addition of PP-g-(GMA-co-St) greatly reduced the MFRvalues of the PA6/PC, implying enhanced compatibility between PA6 and PCin the presence of the PP-g-(GMA-co-St). The phase morphologies of the blends with increasing content of PP-g-(GMA-co-St) were observed by SEM. The particle size of PCdecreased with increasing content of PP-g-(GMA-co-St) in the blend. Much finer dispersion of discrete polycarbonate phase with average domain size 0.2 μm was reached when the content of the PP-g-(GMA-co-St) was 10%(PA6/PC, mass ratio 72/28). This should be due to the formation of the PA6 PP PCcopolymer by chemical reactions between GMAin PP-g-(GMA-co-St) and the terminal amino or carboxylic groups of PA6 and between GMAin PP-g-(GMA-co-St) and terminal -OHgroup of PCduring the melt extrusion process. The formation of PA6 PP PCcopolymer is also characterized by FTIR. The mechanical properties of the PA6/PCblends, particularly the Izod impactstrength and elongation at break were markedly improved by addition of a small amount of PP-g-(GMA-co-St). Itshould be noted that tensile strength of the PA6/PC/PP-g-(GMA-co-St) was also kept with increasing PP-g-(GMA-co-St) content. The PA6/PCblends with balanced mechanical properties can be obtained by addition of PP-g-(GMA-co-St).

Key words: Polyamide6, Polycarbonate, Polypropylene, Multi monomer, Reaction compatibilization