Lisa Brannon-Peppas's Absorbent Polymer Technology PDF

By Lisa Brannon-Peppas

ISBN-10: 0444886540

ISBN-13: 9780444886545

Lately, there was a veritable explosion of analysis and improvement in consumer-oriented fields that make the most of polymeric fabrics which take up quite a lot of water. those fields surround the instruction, characterization and commercialization of separation platforms, pharmaceutical and private care items resembling youngster diapers, female items, incontinence items and lots of different similar parts. The polymeric fabrics used in those purposes are often called absorbent or superabsorbent fabrics due to their skill to swell quickly and to keep huge volumes of water, urine and different organic fluids. the purpose of this booklet is to introduce the basics of polymer constitution and swelling as on the topic of polymers used for those superabsorbent fabrics. within the box of absorbence, specific cognizance is given to crosslinked constructions which swell to greater than fifty occasions their preliminary weight in water or electrolytic strategies. The ebook additionally offers descriptions of novel purposes of superabsorbent fabrics in addition to an in depth research of water shipping in crosslinked polymers

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The rate changed as a function of pH due to a change in propagation rate constant as the extent of ionization was increased. Manickham, et al. [11] reported similar orders with respect to monomer and initiator for polymerization in aqueous solution with persulfate as initiator. They also determined that the rate of polymerization increased with an increase in ionic strength of the reaction medium. The polymerization of acrylic acid with the redox initiation system of Mn^/isobutyric acid was studied by Elayaperumal et al.

11 (1975) 153. 45 PREPARATION AND CHARACTERIZATION OF CROSSLINKED NETWORKS HYDROPHILIC L. O. Box 708, Greenfield, IN 46140, USA SUMMARY In preparing and evaluating polymers for use as absorbent materials, it is critical to know those parameters which will govern the nature of the final polymer. This chapter presents different methods of producing and characterizing crosslinked polymers. Mathematical analyses are given to calculate the degree of swelling, molecular weight between crosslinks, and other characteristics of neutral and ionic polymers based upon such values as the polymer/solvent interaction parameter, dissociation constant of the pendant chains within the polymer and number average molecular weight before crosslinking.

29] prepared polyacrylate absorbents using a suspension polymerization process in which saccharose-fatty acid esters were used as the dispersing agent. Preferred agents were saccharose mono- di- and tristearates. The HLB of the specific agent used helped control the shape of the polymeric particle formed. In an example, HLB of 2-6 yielded 100-500 micron beads, HLB of 6-16 yielded 100-500 micron granules and HLB of less than 2 gave lumps. Some very interesting gel-strength qualities were noted in a table.

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Absorbent Polymer Technology by Lisa Brannon-Peppas

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