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Some physicochemical measurements of chitosan polymer in acetic acid–water mixtures at different temperatures
Author(s) -
Kurkuri Mahaveer D.,
Kulkarni Anandrao R.,
Aminabhavi Tejraj M.
Publication year - 2002
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/app.11007
Subject(s) - excellence , center of excellence , polymer , medal , polymer science , physics , library science , materials science , chemistry , philosophy , computer science , organic chemistry , art history , art , database , epistemology
Polyacrylamide-grafted sodium alginate (PAAm-y-.Na-AIg) copolymcric membranes have been pre pared, characterized, and used in the pervaporation separation of 10-80 mass % water-containing tetrahydrofuran mixtures. Totally three membranes were prepared; (1) neat Na-A!g with 10 mass % of polyethylene glycol (PEG) and 5 mass % of polyvinyl alcohol (PVA), (2) 46 % grafted PAAm-y-Na-AIg membrane containing 10 mass % of PEG and 5 mass % of PVA, and (3) 93 % grafted PAAm-£-Na-Alg membrane containing 10 mass % of PEG and 5 mass % of PVA. Using the transport data, important parameters like permeation flux, selectivity, perva poration separation index, swelling index, and diffusion coef ficient have been calculated at 30°C. Diffusion coefficients were also calculated from sorption gravimetric data of water-tetrahydrofuran mixtures using Fick's equation. Arrhenius activa tion parameters for the transport processes were calculated for 10 mass 'lii of water in the feed mixture using flux and diffusion data obtained at 30,35, and 40°C. The separation selectivity of the membranes ranged between 216 and 591. The highest permeation flux cf 0.677 kg/m2 h was observed for 93% grafted membrane at 80 mass % of water in the feed mixture. *3 2(X)2 Wiley Periodicals, Inc. J Appl Polym Sri 86: 272-281,2002