%0 Journal Article %1 MOE1993a %A MOE, S. T. %A ELGSAETER, A. %A SKJAKBRAEK, G. %A SMIDSROD, O. %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB %D 1993 %I ELSEVIER SCI LTD %J Carbohydr. Polym. %K ;; [ISI:] alginate; polymer; starch %N 4 %P 263 -- 268 %T A NEW APPROACH FOR ESTIMATING THE CROSS-LINK DENSITY OF COVALENTLY CROSS-LINKED IONIC POLYSACCHARIDE GELS %V 20 %X For an ideal polysaccharide gel with a known total polymer chain contour length, crosslinks all of the same functionality and elastic chains all with the same contour length and stiffness, the gel crosslink density can readily be determined from measurements of the maximum volume of the swollen gel (Moe et al., (1991) Food Hydrocolloids, 5, (1/2), 119-23. In the case of randomly crosslinked polysaccharide gels, where the chain contour length between two adjacent crosslinks may vary greatly, it is often much more difficult to determine the crosslink density. This paper reports on an attempt to extend the use of maximum gel volume measurements to estimate crosslink density for the latter type of gel. This is done by calculating the maximum swelling volume for polymer networks with four-functional crosslinks, known elastic chain mean contour length and standard deviation. The numerical analysis involves the calculation of the equilibrium force at each crosslink as the network expands. This allows a detailed study of how the distribution of individual polymer chain contour lengths affects the maximum swelling volume. The computer simulation results are compared with the results from experimental measurements of the maximum volume of swollen covalently crosslinked sodium alginate gels.

@article{MOE1993a, __markedentry = {[phpts:6]}, abstract = {For an ideal polysaccharide gel with a known total polymer chain contour length, crosslinks all of the same functionality and elastic chains all with the same contour length and stiffness, the gel crosslink density can readily be determined from measurements of the maximum volume of the swollen gel (Moe et al., (1991) Food Hydrocolloids, 5, (1/2), 119-23. In the case of randomly crosslinked polysaccharide gels, where the chain contour length between two adjacent crosslinks may vary greatly, it is often much more difficult to determine the crosslink density. This paper reports on an attempt to extend the use of maximum gel volume measurements to estimate crosslink density for the latter type of gel. This is done by calculating the maximum swelling volume for polymer networks with four-functional crosslinks, known elastic chain mean contour length and standard deviation. The numerical analysis involves the calculation of the equilibrium force at each crosslink as the network expands. This allows a detailed study of how the distribution of individual polymer chain contour lengths affects the maximum swelling volume. The computer simulation results are compared with the results from experimental measurements of the maximum volume of swollen covalently crosslinked sodium alginate gels.}, added-at = {2011-11-04T13:47:04.000+0100}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB}, author = {MOE, S. T. and ELGSAETER, A. and SKJAKBRAEK, G. and SMIDSROD, O.}, authoraddress = {UNIV TRONDHEIM,NORWEGIAN INST TECHNOL,DEPT PHYS,N-7034 TRONDHEIM,NORWAY.}, biburl = {https://www.bibsonomy.org/bibtex/214e74b1c10fdebafc1e1e3a74046da9e/pawelsikorski}, citedref = {1961, 865265, GB ; BAILEY E, 1977, COLLOID POLYM SCI, V255, P856 ; BUCHNER PB, 1961, J CHEM SOC, P3974 ; CLARK AH, 1983, MACROMOLECULES, V16, P1367 ; DREYFUS H, 1921, 166767, GB ; FERRERO F, 1982, ANN CHIM, V72, P73 ; FERRERO F, 1982, CHEM ENG COMMUN, V15, P197 ; FLODIN P, 1962, THESIS UPPSALA U SWE ; FLORY PJ, 1953, PRINCIPLES POLYM CHE ; GRASDALEN H, 1983, CARBOHYD RES, V118, P255 ; HIGGS PG, 1989, MACROMOLECULES, V22, P2432 ; HOLMBERG L, 1983, THESIS SWEDISH U AGR ; KARTHA KPR, 1985, STARCH-STARKE, V37, P297 ; KRATKY O, 1949, RECL TRAV CHIM PAY B, V68, P1106 ; KUNIAK L, 1972, STARKE, V24, P110 ; MAZZA MTC, 1971, ANN CHIM, V51, P348 ; MOE ST, 1991, FOOD HYDROCOLLOID, V5, P119 ; MOE ST, 1992, CARBOHYD POLYM, V19, P279 ; ODELL JA, 1988, J CHEM PHYS, V88, P4022 ; OHMINE I, 1982, J CHEM PHYS, V77, P5725 ; ROMBOUTS FM, 1979, J CHROMATOGR, V168, P151 ; SKJAKBRAEK G, 1992, 5144016, US ; SMIDSROD O, 1970, CARBOHYD RES, V13, P359 ; TANAKA T, 1979, POLYMER, V20, P1404 ; TANAKA T, 1981, SCI AM, V244, P110 ; TANAKA T, 1987, NATO ASI SERIES E, V133, P1 ; TANFORD C, 1961, PHYSICAL CHEM MACROM ; WARNER HR, 1972, IND ENG CHEM FUND, V11, P379 ; WEBER M, 1986, J CHROMATOGR, V355, P456 ; YU SH, 1984, POLYM MATER SCI ENG, V50, P512}, interhash = {5d4c49b73dafdce1c241145fd66fcdd8}, intrahash = {14e74b1c10fdebafc1e1e3a74046da9e}, isifile-dt = {Article}, isifile-ga = {LJ773}, isifile-j9 = {CARBOHYD POLYM}, isifile-nr = {30}, isifile-pi = {OXFORD}, isifile-rp = {MOE, ST, UNIV TRONDHEIM,NORWEGIAN INST TECHNOL,NOBIPOL,DEPT ; BIOTECHNOL,N-7034 TRONDHEIM,NORWAY.}, isifile-sc = {Chemistry, Applied; Chemistry, Organic; Polymer Science}, isifile-tc = {8}, issn = {0144-8617}, journal = {Carbohydr. Polym.}, keywords = {;; [ISI:] alginate; polymer; starch}, language = {English}, number = 4, owner = {phpts}, pages = {263 -- 268}, publisher = {ELSEVIER SCI LTD}, size = {6 p.}, sourceid = {ISI:A1993LJ77300004}, timestamp = {2011-11-04T13:47:18.000+0100}, title = {A NEW APPROACH FOR ESTIMATING THE CROSS-LINK DENSITY OF COVALENTLY CROSS-LINKED IONIC POLYSACCHARIDE GELS}, volume = 20, year = 1993 }