Miscibility of poly(N-vinyl-2-pyrrolidone) with (methyl methacrylate)/(2-hydroxyethyl methacrylate) and (n-butyl methacrylate)/(2-hydroxyethyl methacrylate) copolymers

✍ Scribed by S.Y. Lee; M.Y. Low; S.H. Goh

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 246 KB
• Volume: 27
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(91)90238-j

✦ Synopsis

A~traet--The miscibility of poly(N-vinyl-2-pyrrolidone) (PVP) with (methyl methacrylate)/(2-hydroxyethyl methacrylate) (MMA/HEMA) and (n-butyl methacrylate)/(2-hydroxyethyl methacrylate) (BMA/HEMA) copolymers was studied. While PVP is immiscible with poly(methyl methacrylate), it is miscible with a MMA/HEMA copolymer containing 1.9 mol% of HEMA. PVP is immiscible with a BMA/HEMA copolymer containing 13.9 mol% of HEMA and its miscibility with a BMA/HEMA copolymer containing 17.4 mol% of HEMA is composition dependent. However, PVP is completely miscible with BMA/HEMA copolymers having HEMA contents of 20.9, 23.4 and 27.5 mol%. The results show that, as the size of the pendant ester groups becomes larger, the polymethacrylate requires the incorporation of a larger amount of HEMA to achieve miscibility with PVP.