Blends of poly (2,6-dimethyl-1, 4-phenylene oxide)/poly(styrene-co-methacrylic acid)/poly(ethyl methacrylate-co-4-vinylpyridine)

摘要

It is well known that poly (2, 6-dimethyl-1, 4-phenylene oxide) is miscible in all proportions with polystyrene. Blends of these polymers have been extensively studied by several techniques (1-5). A weak interaction parameter between these polymers was estimated by Kambour et al. (6). In the present study, we have investigated the effect of incorporating carboxylic groups into polystyrene chains on the well known miscible PPO/PS blends. Styrene-co-acrylic acid or styrene-co-methacrylic acid of different compositions were prepared and blends of these copolymers with PPO were studied by DSC and viscosimetry. We have previously showed that as a result of specific interactions between the constituents of the blends, SAA or SMA copolymers were miscible in all proportions with poly (alkyl methacrylate-co-4-vinylpyridine). A study of ternary PPO/SMA-12-EM4VP-8 blends was then carried out by DSC to investigate the effect of adding EM4VP-8 to miscible SMA/PPO blends.