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Facile synthesis of poly(4‐hydroxy styrene) from polystyrene
Author(s) -
Deokar S.,
Ghadage R. S.,
Rajan C. R.,
Ponrathnam S.
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.13488
Subject(s) - polystyrene , styrene , polymer chemistry , suspension polymerization , glass transition , polymer , copolymer , polymerization , hydrolysis , materials science , chemistry , organic chemistry
A facile methodology to modify polystyrene, to incorporate alkali soluble hydroxy groups, is reported. Polystyrene of well‐defined number‐average molecular weights in the range of 3000 to 50,000 were prepared by suspension polymerization at 80°C by varying the relative mole ratio of carbon tetrachloride, used as chain transfer agent. Polystyrenes were acetylated; the acetyl groups were converted to acetoxy groups, by Baeyer–Villiger oxidation, and hydrolyzed in a nonaqueous alkaline medium to generate hydroxy groups. The extents of modifications were monitored by infrared spectroscopy. The glass transition temperatures of poly(4‐acetylstyrene‐ co ‐styrene), poly(4‐acetylstyrene‐ co ‐4‐acetoxystyrene‐ co ‐styrene), and poly(4‐hydroxystyrene‐ co ‐4‐acetylstyrene‐ co ‐styrene) were 107, 134, and 142°C, respectively. The polymers were evaluated in photoresist formulations. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3192–3201, 2004