Biopolymers/PVA Hydrogels/Anionic Polymerisation/ by J.Y. Chang, D.Y. Godovsky, M.J. Han, C.M. Hassan, J. Kim, B.

By J.Y. Chang, D.Y. Godovsky, M.J. Han, C.M. Hassan, J. Kim, B. Lee, Y. Lee, N.A. Peppas, R.P. Quirk, T. Yoo

Offers current and destiny developments in polymer technology, with a suite of papers contributed via researchers within the biopolymers, PVA hydrogels, anionic polymerisation, and nanocomposites.

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Additional info for Biopolymers/PVA Hydrogels/Anionic Polymerisation/ Nanocomposites (Advances in Polymer Science) (vol 153)

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Shaaper RN, Leob LA (1981) Proc Natl Acad Sci USA 78:1773 78. Han MJ, Cho TJ, Lee GH, Yoo KS, Park YD, Chang JY (1999) J Polym Sci Chem Ed 37:3361 79. Garrett ER, Seydel JK, Sharpen AJ (1966) J Org Chem 31:2199 80. Shapiro R, Danzig M (1972) Biochemistry 11:23 81. Shapiro R, Danzig M (1973) Biochim Biophys Acta 319:5 82. Cech TR (1990) Angew Chem Int Ed Engl 29:759 83. Altman S (1990) Angew Chem Int Ed Engl 29:749 84. Uhlenbeck OC (1987) Nature 328:596 85. Cech TR (1986) Sci Amer 255:76 86. Zuag AJ, Cech TR (1986) Science 231:470 87.

In addition, the work showed that the rate of freezing affected the size of ice crystals formed and, therefore, the number of crosslinks formed. Cha et al. [60] further examined the microstructure of PVA gels with differential scanning calorimetry. They also classified the water in PVA hydrogels as free, intermediate, or bound water. PVA gels were prepared by three different techniques: chemical crosslinking with glutaraldehyde, annealing of dried films, and crystallization at low temperatures.

61 References . . . . . . . . . . . . . . . . . . . 62 Advances in Polymer Science, Vol. 153 # Springer-Verlag Berlin Heidelberg 2000 38 Christie M. Hassan, Nikolaos A. Peppas 1 Structure and Properties of Poly(vinyl alcohol) (PVA) Poly(vinyl alcohol) (PVA) has a relatively simple chemical structure with a pendant hydroxyl group. The monomer, vinyl alcohol, does not exist in a stable form rearranging to its tautomer, acetaldehyde. Therefore, PVA is produced by the polymerization of vinyl acetate to poly(vinyl acetate) (PVAc), followed by hydrolysis of PVAc to PVA.

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