Bound fractions of methacrylate polymers adsorbed on silica using FTIR

Piyawan Krisanangkura; Alyssa M. Packard; Jacqueline Burgher; Frank D. Blum

doi:10.1002/polb.22066

journal article Jul 15, 2010

Bound fractions of methacrylate polymers adsorbed on silica using FTIR

Piyawan Krisanangkura Alyssa M. Packard Jacqueline Burgher Frank D. Blum

Journal of Polymer Science Part B: Polymer Physics Vol. 48 No. 17 pp. 1911-1918 · Wiley

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Abstract

AbstractThe H‐bonding of carbonyl groups on a series of methacrylate polymers with silanols on fumed silica was studied with transmission FTIR. The set included poly(alkyl methacrylates) with alkyl groups, (n‐CnH2n+1) of n = 1, 2, 4, and 12 and poly(benzyl methacrylate). Shifts in the vibrational frequencies for bound carbonyl groups (of ∼20 cm−1 lower than those found in the bulk) were observed in the adsorbed polymer samples. A series of samples with different adsorbed amounts (varying from 0.5 to 2.0 mg m−2) of each polymer was prepared to determine the effect of the side chain on the H‐bonding. The fractions of bound carbonyls, p, for each of the methacrylate polymers studied, were calculated from a model based on the ratios of the absorption coefficients of the bound to free carbonyl resonances, X (= αb/αf). The X values were determined from linear regressions of the ratios of the free to bound carbonyl intensities as a function of the amounts of adsorbed polymer, Mt. The bound fractions, p, were observed to decrease with increase in adsorbed amounts and with increase in the lengths of the side chains of the methacrylate polymers, except for poly(lauryl methacrylate) (PLMA). PLMA has a very low glass transition temperature (Tg) and is likely rubbery on the surface, whereas the other polymers are likely glassy at ambient temperature. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 1911–1918, 2010

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Details

Published: Jul 15, 2010
Vol/Issue: 48(17)
Pages: 1911-1918
License: View

Authors

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Piyawan Krisanangkura

Cite This Article

Piyawan Krisanangkura, Alyssa M. Packard, Jacqueline Burgher, et al. (2010). Bound fractions of methacrylate polymers adsorbed on silica using FTIR. Journal of Polymer Science Part B: Polymer Physics, 48(17), 1911-1918. https://doi.org/10.1002/polb.22066

Bound fractions of methacrylate polymers adsorbed on silica using FTIR

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