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Synthesis and characterization of polypropylene‐grafted gelatin
Author(s) -
Kaur Inderjeet,
Gautam Neena,
Khan. Deepika
Publication year - 2009
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.28736
Subject(s) - gelatin , distilled water , swelling , polymer chemistry , benzoyl peroxide , solvent , grafting , thermogravimetric analysis , nuclear chemistry , materials science , acrylonitrile , polypropylene , dimethylformamide , copolymer , chemistry , monomer , chromatography , organic chemistry , composite material , polymer
Modification of polypropylene (PP) has been successfully carried out by graft copolymerization of gelatin, by chemical method using benzoyl peroxide (BPO) as radical initiator. PP was preirradiated by gamma rays at a constant dose rate of 3.40 kGy/h before grafting to introduce hydroperoxide groups. Optimum conditions pertaining to maximum percentage of grafting were evaluated as a function of different reaction parameters. Maximum percentage of grafting of gelatin (115%) was obtained at BPO concentration = 4.132 × 10 −2 mol/L in 120 min at 70°C using 30 mL of water. Characterization of PP‐ g ‐gelatin was carried out through FTIR, thermogravimetric analysis, and scanning electron microscopy. Swelling studies were carried out in pure, binary, ternary, and quaternary solvent systems comprising distilled water, ethanol, dimethylsulphoxide (DMSO), and N,N ‐dimethylformamide (DMF) in different ratios. Maximum swelling of PP‐ g ‐gelatin (both composite and true graft) was observed in pure solvents that is, DMSO followed by DMF, ethanol, and water and was higher than that observed in the mixed solvent system. Water retention studies of unmodified PP, that is, pristine PP and PP‐ g ‐gelatin (both composite and true graft) were investigated at different time periods, temperatures and pH. Maximum % water retention for PP‐ g ‐gelatin (composite; 170%) was observed in 8 h at 50°C in neutral medium (pH = 7). © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010