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Template polymerization of chromium acrylate
Author(s) -
Chaturvedi Bharti,
Srivastava A. K.
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990310309
Subject(s) - polymerization , vinyl acetate , monomer , acrylate , polymer chemistry , polymer , dimethylformamide , materials science , chromium , van der waals force , vinyl polymer , solvent , chemistry , copolymer , organic chemistry , molecule , composite material , metallurgy
The template polymerization of chromium acrylate (CrA 3 ) with poly‐(vinyl acetate) (PVAc, M̄ v = 56 265) at 90 ±0.1°C for 2 h in dimethylformamide has been studied dilatometrically to examine the effects of concentration and average molecular weight of template, and of monomer concentration upon the kinetics and mechanism of template polymerization. The viscometric measurements showed that the complexation between poly‐CrA 3 and PVAc was at a maximum when the template/polymer ratio was 1:1, and the time required for complete complexation was 8 min. The value of the coefficient of interaction ( K AB ) between the two polymers was high for DMSO, medium for DMF and low for dioxane, and is a direct function of the polarity of the solvent. The K AB values indicate that an interaction, which consists of van der Waals forces and hydrogen bonding, exists between the polymers. The overall activation energy was 72.1 and 57.3 kJ mol −1 in the absence and presence of PVAc, respectively.