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P[CF 3 (CF 2 ) 5 CH 2 MA‐ co ‐MMA] and P[CF 3 (CF 2 ) 5 CH 2 MA‐ co ‐BA] copolymers: Reactivity ratios and surface properties
Author(s) -
Van De Grampel Robert D.,
Van Geldrop Jan,
Laven Jozua,
Van Der Linde Rob
Publication year - 2000
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 - 10.1002/1097-4628(20010103)79:1<159::aid-app180>3.0.co;2-w
Subject(s) - copolymer , polymer chemistry , reactivity (psychology) , monomer , methyl methacrylate , methacrylate , materials science , polymerization , acrylate , surface energy , polymer , adsorption , butyl acrylate , chemistry , composite material , medicine , alternative medicine , pathology
This study aimed at reducing the surface energy of coatings by copolymerization of commonly used monomers with fluorine‐containing monomers. Copolymers of 1,1‐dihydroperfluoroheptyl methacrylate (FHMA) and methyl methacrylate (MMA) or butyl acrylate (BA) are prepared by low‐conversion polymerization in solution. Using 1 H‐NMR data and nonlinear least‐squares data fitting, reactivity ratios of these systems at 80°C are determined to be r FHMA = 1.31, r MMA = 0.76, and r FHMA = 3.15, r BA = 0.38, respectively. We assume that the penultimate unit effect plays an important role in these systems. Introduction of the perfluoroalkyl side chain lowers the polymer surface energy significantly; copolymers of MMA and FHMA show a reduction in total surface energy of about 50 % at a content of 15 mol % FHMA as compared with pure PMMA. The attainable reduction in surface energy is much larger than with, for example, Teflon. This is due to the preferential adsorption of the —CF 3 groups of the fluoroalkyl side chain, if compared to that of the —CF 2 — groups of Teflon. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 159–165, 2001