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Morphological and thermal evaluation of soy protein concentrate on graft copolymerization with ethylmethacrylate
Author(s) -
Kaith Balbir Singh,
Jindal Rajeev,
Bhatia Jaspreet Kaur
Publication year - 2010
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.33448
Subject(s) - thermogravimetric analysis , copolymer , monomer , materials science , polymer chemistry , thermal decomposition , fourier transform infrared spectroscopy , solvent , ascorbic acid , differential scanning calorimetry , redox , chemical engineering , chemistry , composite material , polymer , organic chemistry , food science , engineering , physics , metallurgy , thermodynamics
Soy protein concentrate was grafted with ethylmethacrylate using ascorbic acid/potassium persulphate as a redox initiator. Different reaction parameters, such as reaction time, reaction temperature, solvent amount, initiator ratio, and pH, and monomer concentration were optimized to get maximum graft yield (134.12%). The graft copolymer formed was characterized by Fourier transform infrared spectrophotometer, X‐ray diffraction, and scanning electron microscope techniques. Thermogravimetric analysis, differential thermal analysis, and differential thermogravimetric analysis studies showed that graft copolymer was thermally more stable than the backbone. Thermal decomposition studies indicated that the rate of weight loss per minute was found more in case of backbone when compared with that of graft copolymer. Further, graft copolymer was also found more resistant toward acid–base attack and was found to be more water repellent. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011