Application of GPC/LALLS to cellulose research. [Gel permeation chromatography/low-angle laser light scattering]
The techniques of gel permeation chromatography and low-angle laser light scattering (GPC/LALLS) have been combined for absolute determination of cellulose molecular weights and molecular weight distributions (MWD). The GPC/LALLS technique has been applied to tetrahydrofuran (THF) solutions of cellulose tricarbanilate (CTC) derivatives prepared from celluloses having a wide range of molecular weights. The molecular weight data obtained are consistent with values determined by intrinsic viscosity methods; and as a consequence of the absolute nature of this technique, Mark-Houswink coefficients can be predicted from a single, broad-distribution, linear homopolymer without recourse to tedious and time-consuming fractional precipitation methods. A unique application of the technique has been in correlating GPC/LALLS molecular weight data with the viscosity of nonderivatized celluloses dissolved in 0.5 M cupiethylenediamine hydroxide (CuEn). The procedure yields an absolute viscosity-molecular weight relationship which is comparable with a similar relationship originally derived from cellulose nitrates. The results indicate that the weight-average degree of polymerization (DP/sub w/) for CTC preparations is considerably greater than that obtained from cellulose nitrates, and this discrepancy, in DP/sub w/ has been attributed to errors in the Mark-Houwink coefficients for the cellulose nitrate-acetone system. 25 references, 9 figures, 7 tables.
- Research Organization:
- International Paper Co., Tuxedo Park, NY
- OSTI ID:
- 6857770
- Report Number(s):
- CONF-8205234-Vol.1
- Journal Information:
- J. Appl. Polym. Sci.: Appl. Polym. Symp.; (United States), Conference: 9. cellulose conference, Syracuse, NY, USA, 24 May 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
09 BIOMASS FUELS
CELLULOSE
MOLECULAR WEIGHT
STRUCTURAL CHEMICAL ANALYSIS
CELLULOSE ESTERS
ACCURACY
CELLOPHANE
CHROMATOGRAPHY
COMPARATIVE EVALUATIONS
COTTON
DERIVATIZATION
DISTRIBUTION
LASERS
LIGHT SCATTERING
MEASURING METHODS
PHOTOMETRY
POLYMERIZATION
RAYON
WOOD
CARBOHYDRATES
CHEMICAL REACTIONS
ESTERS
ORGANIC COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SCATTERING
SEPARATION PROCESSES
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