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Synthesis of acrylamide‐ co ‐(itaconic acid) superabsorbent polymers and associated silica superabsorbent polymer composites
Author(s) -
Seetapan Nispa,
Srisithipantakul Natsiri,
Kiatkamjornwong Suda
Publication year - 2011
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21882
Subject(s) - itaconic acid , superabsorbent polymer , materials science , acrylamide , composite material , polymer , polymerization , particle size , polymer chemistry , in situ polymerization , chemical engineering , nuclear chemistry , monomer , chemistry , engineering
Superabsorbent polymers (SAPs) were synthesized from acrylamide (AM) and itaconic acid (IA) via a crosslinking polymerization. SAP composites (SAPCs) were formed by the incorporation of silica with three particle sizes into the polymerization to increase the gel strength of SAPs. Effects of AM: IA molar ratios, silica types and concentrations on water absorbency, absorbency rate and absorbency under loadings (AUL) of the composites were investigated. The highest water absorbency of the SAP is 233 ± 8 g g −1 at an AM: IA molar ratio of 97:3 with absorbency of 149 ± 2 g g −1 within 15 min. The highest AUL of the SAPC with 0.5%–2.0% w w −1 silica is 13 g g −1 by 1.93 × 10 3 Pa load. A pseudo‐second‐order kinetics for water absorbency was found in both SAPs and in situ SAPCs. In situ SAPCs and the mechanically mixed SAPCs in vertical and horizontal direction yielded similar water absorbency values. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers