Abstract
The effect of maleic anhydride (MA) content on morphological, thermal, thermomechanical and mechanical properties of PA6/AES/MMA-MA (66.5/28.5/5 wt%) system was investigated. In general, the simple incorporation of MMA-MA to PA6/AES system is responsible for enhancements in mechanical performance. PA6/AES/MMA-MA3% and PA6/AES/MMA5% exhibited similar morphology and final properties, indicating no MA content effect on the studied system. On the other hand, PA6/AES/MMA-MA10% exhibited a quite different morphology and lower mechanical performance compared to the other compatibilized blends. Such unexpected behavior was not attributed to the effective maleic anhydride content in this composition, but to the reduced molar mass resulted from the excess of non-reacted MA monomer during the synthesis procedure.
Highlights
Polyamides belong to the attractive class of engineering thermoplastics due its good strength/stiffness allied to chemical and wear resistance
In our previous work[10], we demonstrated the utility of methyl methacrylate-co-maleic anhydride (MMA-MA) in the compatibilization of Polyamide 6 (PA6)/ABS blends
Due to the poor reactivity of maleic anhydride, it seems that increases MA ratio will not lead to its homopolymerization neither improving the efficiency of grafting reaction, but will just outcome in larger amounts of non-reacted MA monomer dissolved on the system
Summary
Polyamides belong to the attractive class of engineering thermoplastics due its good strength/stiffness allied to chemical and wear resistance. As previously reported[7,8], such limitations can be overcome by employing saturated elastomers instead of PB In this way, acrylonitrile-ethylene-propylene-diene-styrene (AES) has been considered as an attractive alternative since it is chemically similar to ABS, except that PB is replaced by ethylene-propylene-diene (EPDM)[9]. In our previous work[10], we demonstrated the utility of methyl methacrylate-co-maleic anhydride (MMA-MA) in the compatibilization of PA6/ABS blends This copolymer contains MA units capable of reacting with PA6 end-groups whereas the methyl methacrylate (MMA) has been demonstrated to be miscible with the SAN phase of ABS over a wide range of acrylonitrile content[14]. The focus of this study is to investigate the effect of maleic anhydride content in morphological, thermal, thermomechanical and mechanical properties of PA6/AES blends compatibilized with MMA-MA
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