%0 Journal Article %1 Trzcinski2002 %A Trzcinski, S. %A Varum, K. M. %A Staszewska, D. U. %A Smidsrod, O. %A Bohdanecky, M. %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND %D 2002 %I ELSEVIER SCI LTD %J Carbohydr. Polym. %K ; ;; [ISI:] chain chitosan; chloride); n-acetylation; poly(diallydimethylammonium polyelectrolytes; spectrophotometry; stiffness weight %N 2 %P 171 -- 178 %T Comparative studies on molecular chain parameters of chitosans and poly(diallyldimethylammonium chloride): the stiffness B-parameter and the temperature coefficient of intrinsic viscosity %V 48 %X The empirical coefficient B, a measure of polyelectrolyte chain stiffness was estimated for two types of polycations: chitosans with FA (mote fraction of N-acetyl-D-glucosamine units) ranging from 0.09 to 0.21 (determined by H-1 NMR method) and poly(diallyldimethylammonium. chloride) (PDADMAC), in the presence of different counterions (Cl-, Br-, NO3-, ClO4-). The method relies on the measurements of the intrinsic viscosity, eta, of polyelectrolyte chains at different solution ionic strength (1). Thus, the B-parameter shows the response of the hydrodynamic volume of polyelectrolyte molecules to the salt concentration in solution (the so-called salt tolerance) referred to the eta at I = 0.1 M. The temperature coefficient of intrinsic viscosity of PDADMAC and chitosan was also determined. The comparison of the B-parameters indicates lower flexibility of chitosan than PDADMAC. The reasons for this difference are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.

@article{Trzcinski2002, __markedentry = {[phpts:6]}, abstract = {The empirical coefficient B, a measure of polyelectrolyte chain stiffness was estimated for two types of polycations: chitosans with FA (mote fraction of N-acetyl-D-glucosamine units) ranging from 0.09 to 0.21 (determined by H-1 NMR method) and poly(diallyldimethylammonium. chloride) (PDADMAC), in the presence of different counterions (Cl-, Br-, NO3-, ClO4-). The method relies on the measurements of the intrinsic viscosity, [eta], of polyelectrolyte chains at different solution ionic strength (1). Thus, the B-parameter shows the response of the hydrodynamic volume of polyelectrolyte molecules to the salt concentration in solution (the so-called salt tolerance) referred to the [eta] at I = 0.1 M. The temperature coefficient of intrinsic viscosity of PDADMAC and chitosan was also determined. The comparison of the B-parameters indicates lower flexibility of chitosan than PDADMAC. The reasons for this difference are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.}, added-at = {2011-11-04T13:47:04.000+0100}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, author = {Trzcinski, S. and Varum, K. M. and Staszewska, D. U. and Smidsrod, O. and Bohdanecky, M.}, authoraddress = {Nicholas Copernicus Univ, Fac Chem, PL-87100 Torun, Poland. ; Norwegian Univ Sci & Technol, Norwegian Biopolymer Lab, Dept Biotechnol, NOBIPOL, N-7491 Trondheim, Norway. ; Acad Sci Czech Republ, Inst Macromol Chem, Prague 16000, Czech Republic.}, biburl = {https://www.bibsonomy.org/bibtex/25c41a572e4e357c291412893dd12b412/pawelsikorski}, citedref = {ANTHONSEN MW, 1993, CARBOHYD POLYM, V22, P193 ; ANTHONSEN MW, 1994, CARBOHYD POLYM, V25, P13 ; BOWMAN LM, 1979, J POLYM SCI POL LETT, V17, P167 ; BRAND F, 1997, ANGEW MAKROMOL CHEM, V248, P41 ; CHEN RH, 1998, INT J BIOL MACROMOL, V23, P135 ; DAUTZENBERG H, 1994, POLYELECTROLYTES FOR, P272 ; DAUTZENBERG H, 1998, MACROMOL CHEM PHYSIC, V199, P1561 ; DOMARD A, 1983, INT J BIOL MACROMOL, V5, P49 ; FIXMAN M, 1964, J CHEM PHYS, V41, P3772 ; FLORY PJ, 1966, STAT MECH CHAIN MOL ; JAEGER W, 1996, MACROMOL SYMP, V111, P95 ; LEE VFP, 1974, SOLUTION SHEAR PROPE ; LYUBINA SY, 1983, VYSOKOMOL SOEDIN A, V25, P1467 ; MAXIM S, 1977, EUR POLYM J, V13, P105 ; MUZZARELLI RAA, 1985, CARBOHYD POLYM, V5, P461 ; NEGI Y, 1967, J POLYM SCI POL CHEM, V5, P1951 ; NOGUCHI H, 1981, WATER ACTIVITY INFLU, P281 ; POGODINA NV, 1986, VYSOKOMOLEKULARNYE A, V2, P232 ; REDDY GV, 1987, MACROMOLECULES, V20, P1303 ; REDDY GV, 1988, POLYMER, V29, P1894 ; RINAUDO M, 1989, CHITIN CHITOSAN, P71 ; ROBERTS GAF, 1982, INT J BIOL MACROMOL, V4, P374 ; ROBERTS GAF, 1992, CHITIN CHEM, P295 ; ROBERTS GAF, 1992, CHITIN CHEM, P64 ; RODRIGUEZSANCHE.D, 1982, CHITIN CHITOSAN, P30 ; SHIGEMASA Y, 1995, BIOTECHNOL GENET ENG, V13, P383 ; SMIDSROD O, 1971, BIOPOLYMERS, V10, P1213 ; SMIDSROD O, 1991, SEAWEED RESOURCES EU, R10 ; TAN SC, 1998, TALANTA, V45, P713 ; TERBOJEVICH M, 1986, P 3 INT C CHIT CHIT, P349 ; TRZCINSKI S, 2000, IUPAC 2000 9 14 JUL ; VARUM KM, 1991, CARBOHYD RES, V211, P17 ; WANDREY C, 1982, ACTA POLYM, V33, P156 ; WANDREY C, 1999, ADV POLYM SCI, V145, P125 ; XIA JL, 1995, J POLYM SCI POL PHYS, V33, P1117 ; YAMAKAWA H, 1974, MACROMOLECULES, V7, P128}, interhash = {e6f628d890f750bc2e3b81db55b073ba}, intrahash = {5c41a572e4e357c291412893dd12b412}, isifile-dt = {Article}, isifile-ga = {525QM}, isifile-j9 = {CARBOHYD POLYM}, isifile-nr = {36}, isifile-pi = {OXFORD}, isifile-rp = {Trzcinski, S, Nicholas Copernicus Univ, Fac Chem, 7 Gagarin St, ; PL-87100 Torun, Poland.}, isifile-sc = {Chemistry, Applied; Chemistry, Organic; Polymer Science}, isifile-tc = {4}, issn = {0144-8617}, journal = {Carbohydr. Polym.}, keywords = {; ;; [ISI:] chain chitosan; chloride); n-acetylation; poly(diallydimethylammonium polyelectrolytes; spectrophotometry; stiffness weight}, language = {English}, month = MAY, number = 2, owner = {phpts}, pages = {171 -- 178}, publisher = {ELSEVIER SCI LTD}, size = {8 p.}, sourceid = {ISI:000174082500007}, timestamp = {2011-11-04T13:47:26.000+0100}, title = {Comparative studies on molecular chain parameters of chitosans and poly(diallyldimethylammonium chloride): the stiffness B-parameter and the temperature coefficient of intrinsic viscosity}, volume = 48, year = 2002 }