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Home  >  Journal list  >  Polymer Journal  >  Vol.14  No.7 (1982)  >  pp.563-569

Polymer Journal
<<Previous article Vol.14  No.7 (1982)   pp.563 - 569 Next article>>

Adsorption of Poly(4-vinylpyridine) on Silica Surface

Masami Kawaguchi1), Kenji Kamiya1) and Akira Takahashi1)
1) Department of Industrial Chemistry, Faculty of Engineering, Mie University

ABSTRACT:  Adsorption of poly(4-vinylpyridine) onto a nonporous silica (Aerosil 130) from its nitroethane solution at 25°C was studied by IR spectroscopy and UV spectroscopy. The nitroethane was found to be essentially a theta solvent for poly(4-vinylpyridine). The observed frequency shift of the silanol groups for poly(4-vinylpyridine) is attributed to the hydrogen bonding between the nitrogen atoms of adsorbed poly(4-vinylpyridine) and silanol groups. Adsorbance (A) was determined by UV spectroscopy, while the fraction of surface sites occupied (θ) and the fraction of adsorbed segments (p) were determined by IR spectroscopy. The values of A and θ in the plateau region increased with increasing molecular weight. The values of p were independent of molecular weight. The data in the plateau region were compared with the theoreis of Roe, Silberberg, and Scheutjens and Fleer based on a lattice model, and qualitative agreement was found between theory and experiment.


Keyword:
Adsorption/ Poly(4-vinylpyridine)/ Silica/ IR Spectroscopy/ UV Spectroscopy/ Frequency Shift/ Adsorbance/ Surface Sites/ Adsorbed Segments/ Adsorbed Amount

Published online: March 03, 2006
© Copyright, 2006 by The Society of Polymer Science, Japan

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