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Blends and interpolymer complexes of poly(styrene‐co‐4‐vinylphenylmethylphenylsilanol) and poly( N ‐vinylpyrrolidone)
Author(s) -
Lu Shaoxiang,
Pearce Eli M.,
Kwei T. K.
Publication year - 1996
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199605)7:5/6<553::aid-pat546>3.0.co;2-d
Subject(s) - copolymer , silanol , materials science , polymer chemistry , styrene , monomer , hydrogen bond , glass transition , fourier transform infrared spectroscopy , n vinylpyrrolidone , polymer , polymer blend , chemical engineering , molecule , organic chemistry , chemistry , composite material , catalysis , engineering
Polymer blends of poly(N‐vinylpyrrolidone) (PVPr) and poly(styrene‐co‐4‐vinylphenylmethylphenylsilanol) (ST‐VPMPS) copolymers with varying amounts of VPMPS monomer units have been investigated. Glass transition temperature (T g ) measurements indicated that miscible blends of PVPr with ST‐VPMPS copolymers were formed when the copolymers contained 9 mole% VPMPS or more. In addition, precipitated interpolymer complexes were formed from solution blending when the copolymer contained 31 mole% VPMPS or more. Enhanced T g s were found for most miscible blends. Fourier transform infrared spectroscopy studies revealed that the hetero‐associated hydrogen bond between the silanol and amide carbonyl groups was stronger than that of the silanol self‐associated hydrogen bonds of the copolymers. T g comparisons of the ST‐VPMPS/PVPr miscible blends with the previously reported poly(styrene‐co‐4‐vinylphenyldimethylsilanol) and PVPr (ST‐VPMPS/PVPr) miscible blends were made. The enhanced T g s of the miscible ST‐VPMPS/PVPr blends were attributed to a close‐packed hetero interpolymer chain segments associated with the “free volume” changes due to the formation of strong hetero‐associated hydrogen bond.