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Peleg and Weibull models for water absorption of copolymer gels crosslinked on polyethylene glycol dimethacrylates

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Abstract

In this study, the super-absorbent copolymer gels were obtained from the aqueous solution of monomers dispersed in a continuous organic phase. The inverse suspension polymerization was accomplished with the use of aqueous solutions of partly neutralized acrylic acid with a predetermined crosslinker agent, polyethylene glycol dimethacrylates (PEGDMA)/monomer ratio in cyclohexan. The copolymer gels synthesized using PEGDMA crosslinker with three different molecular weights (PEGDMA330, PEGDMA550, and PEGDMA750) were characterized by ınfrared spectroscopy and scanning electron microscopy. Water absorption capacities of the copolymer gels were determined. The water absorption capacity of 1 g copolymer gels in water was respectively obtained as 232, 255, and 316 g water/g polymer gel for PEGDMA330, PEGDMA550, and PEGDMA750, respectively. The Peleg and Weibull models were used to describe the water absorption behavior of the copolymer gels. The highest values of R 2 and the lowest values of χ 2 and RMSE for copolymer gels were observed with the Weibull model.

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  1. Chemical Engineering Department, Yildiz Technical University, 34210, Istanbul, Turkey

    Osman Ismail

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  1. Osman Ismail
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Ismail, O. Peleg and Weibull models for water absorption of copolymer gels crosslinked on polyethylene glycol dimethacrylates. Res Chem Intermed 40, 1327–1335 (2014). https://doi.org/10.1007/s11164-013-1041-3

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  • DOI: https://doi.org/10.1007/s11164-013-1041-3

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