Research output: Contribution to journal › Article › peer-review
Flow birefringence of pullulan molecules in solutions. / Pavlov, Georges M.; Yevlampieva, Natalia P.; Korneeva, Evgueniya V.
In: Polymer, Vol. 39, No. 1, 01.01.1998, p. 235-239.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Flow birefringence of pullulan molecules in solutions
AU - Pavlov, Georges M.
AU - Yevlampieva, Natalia P.
AU - Korneeva, Evgueniya V.
PY - 1998/1/1
Y1 - 1998/1/1
N2 - Flow birefringence (FB) of polymaltotriose (pullulan) in water and in dimethylsulfoxide (DMSO) has been studied. Pullulan has a high refractive index increment (Δn/Δc) in water but in DMSO it is low. Accordingly, in water the FB of molecules is mainly determined by the macroform effect and in DMSO by the intrinsic anisotropy of polarizabilities of the polysaccharide chain. The analysis of the dependencies of reduced FB values [n]/[η] on molecular weight and on Δn/Δc makes it possible to determine quantitatively the value of intrinsic segmental anisotropy of pullulan molecules: (α1 - α2) = +33 × 10-25 cm3. On the basis of this value the optical anisotropy of the glucopyranose ring was determined. © 1997 Published by Elsevier Science Ltd.
AB - Flow birefringence (FB) of polymaltotriose (pullulan) in water and in dimethylsulfoxide (DMSO) has been studied. Pullulan has a high refractive index increment (Δn/Δc) in water but in DMSO it is low. Accordingly, in water the FB of molecules is mainly determined by the macroform effect and in DMSO by the intrinsic anisotropy of polarizabilities of the polysaccharide chain. The analysis of the dependencies of reduced FB values [n]/[η] on molecular weight and on Δn/Δc makes it possible to determine quantitatively the value of intrinsic segmental anisotropy of pullulan molecules: (α1 - α2) = +33 × 10-25 cm3. On the basis of this value the optical anisotropy of the glucopyranose ring was determined. © 1997 Published by Elsevier Science Ltd.
KW - Flow birefringence
KW - Linear polysaccharide
KW - Optical anisotropy
UR - http://www.scopus.com/inward/record.url?scp=0031952508&partnerID=8YFLogxK
U2 - 10.1016/S0032-3861(97)84843-4
DO - 10.1016/S0032-3861(97)84843-4
M3 - Article
AN - SCOPUS:0031952508
VL - 39
SP - 235
EP - 239
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 1
ER -
ID: 132314616