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Synthesis of superabsorbent polymers by irradiation and their applications in agriculture
Author(s) -
Chen Peng,
Zhang Wei'An,
Luo Wei,
Fang Yue'e
Publication year - 2004
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.20612
Subject(s) - superabsorbent polymer , acrylic acid , copolymer , monomer , acrylamide , starch , grafting , peg ratio , polymer , polymer chemistry , materials science , swelling , ethylene glycol , chemical engineering , nuclear chemistry , chemistry , organic chemistry , composite material , finance , economics , engineering
The superabsorbent polymers (SAPs) were synthesized by grafting copolymerization of acrylic acid and acrylamide onto starch by using γ‐ray radiation technique and poly(ethylene glycol) (PEG) as a crosslinker. The samples were characterized by IR spectroscopy. The effect of various synthetic parameters such as irradiation dose, irradiation dose rate, monomer concentration, monomer/starch ratio, and PEG content were studied. The effects of different drying methods on water absorbency of the SAPs were also studied. The experimental results showed that the water absorbency of the SAPs depends largely on the specific conductance of water when the specific conductance is below 500 μs/cm. The water retention of sand and soil was enhanced by using the SAPs. Effects of the SAPs on the germination of seeds and growth of young plants were investigated. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 1748–1755, 2004