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Study of the miscibility of poly(N-vinyl-2-pyrrolidone) with poly[styrene-co-(4-hydroxystyrene)]

✍ Scribed by K. J. Zhu; Wang Liqun; Wang Ji; Yang Shilin

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
369 KB
Volume
195
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Poly(N‐vinyl‐2‐pyrrolidone) (PVP) was blended with poly[styrene‐co‐(4‐hydroxytyrene)] (PSH) which was obtained from the random copolymer poly[styrene‐co‐(4‐acetoxystyrene)] (PSA). The miscibility of PVP/PSH blends in a composition 1 : 1 by weight was evaluated by differential scanning calorimetry (DSC), non‐radiative energy transfer (NET) and Fourier transform infrared (FTIR) spectroscopy. It was found that the blends become miscible when the hydroxystyrene units (HS) in PSH exceed 11 mol‐%. The driving force of miscibility may be attributed to hydrogen bonding between OH in PSH and in PVP. The experimental results of miscibility were compared with that estimated from a “miscibility parameter” (MP) concept, and we found that the general trend of MP values is in agreement with the experimental results.

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