The molecular weight and fractional composition of the cellulose acetate as factors in the properties of acetate fibre

1973 ◽  
Vol 5 (1) ◽  
pp. 68-71
Author(s):  
Yu. A. Kostrov ◽  
M. Ya. Ivan ◽  
Z. V. Baibakova ◽  
V. M. Golubev ◽  
L. P. Perepechkin
Keyword(s):  
Molecular Weight ◽  
Cellulose Acetate ◽  
Fractional Composition ◽  
Acetate Fibre

Effect of organoclay content and molecular weight on cellulose acetate nanocomposites properties

2012 ◽  
Vol 97 (10) ◽  
pp. 1996-2001 ◽  
Author(s):  
Francisco J. Rodríguez ◽  
Alejandro Coloma ◽  
María J. Galotto ◽  
Abel Guarda ◽  
Julio E. Bruna
Keyword(s):  
Molecular Weight ◽  
Cellulose Acetate

Stabilization of the properties of high-molecular-weight cellulose acetate

1994 ◽  
Vol 26 (1) ◽  
pp. 36-38
Author(s):  
E. A. Nekhaenko ◽  
L. S. Gembitskii ◽  
N. V. Protsenko ◽  
R. P. Papikyan ◽  
N. L. Kuz'mina ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Cellulose Acetate ◽  
High Molecular Weight

Viscosity–Molecular Weight Relations for Cellulose Acetate Butyrate.

1945 ◽  
Vol 37 (6) ◽  
pp. 573-577 ◽  
Author(s):  
J. W. Tamblyn ◽  
D. R. Morey ◽  
R. H. Wagner
Keyword(s):  
Molecular Weight ◽  
Cellulose Acetate ◽  
Cellulose Acetate Butyrate ◽  
Acetate Butyrate

Some methods of modifying the properties of bulked secondary cellulose acetate fibre

1972 ◽  
Vol 3 (3) ◽  
pp. 319-322
Author(s):  
Z. D. Tulguk ◽  
G. V. Kulik ◽  
O. G. Tarakanov
Keyword(s):  
Cellulose Acetate ◽  
Acetate Fibre

Preparation of cellulose acetate films with controlled porosity

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Rodolfo-Fabian Estrada ◽  
Carlos Alvarez-Gayosso ◽  
Victor M. Castaño
Keyword(s):  
Electron Microscopy ◽  
Molecular Weight ◽  
Cellulose Acetate ◽  
Hot Water ◽  
Polymeric Films ◽  
Water Mixture ◽  
Controlled Porosity ◽  
Ice Water ◽  
High Molecular Weight Poly ◽  
Scanning Electron

AbstractPorous polymeric films were obtained by immersing a solution of cellulose acetate and high molecular weight poly(acrylic acid) into an ice-water mixture. The films, the porosity of which can be controlled (reversibly) by immersion into hot water for varying periods of time, were characterized by IR spectroscopy and lowvacuum scanning electron microscopy.

Chromatographic Fractionation of Some Synthetic Elastomers

1948 ◽  
Vol 21 (3) ◽  
pp. 682-683 ◽  
Author(s):  
Ivan Landler
Keyword(s):  
Molecular Weight ◽  
Cellulose Acetate ◽  
Active Carbon ◽  
Low Molecular Weight ◽  
High Polymer ◽  
Acrylonitrile Copolymer ◽  
Molecular Weights ◽  
The Mean ◽  
Mean Molecular Weight ◽  
Poor Solvent

Abstract Mark and Saito were the first to fractionate a high polymer (cellulose acetate) by chromatographic adsorption on blood carbon. They found that molecules of low molecular weight were adsorbed first, and that the mean molecular weight of the product which remained unadsorbed was higher than the original molecular weight. Levi and Giera confirmed this result, but did not succeed in fractionating Buna-S or polyisoprene, for these polymers were eluted by the solvent during the washing operation in the column. The present authors have carried out further experiments in this field with a study of three commercial synthetic elastomers, viz., GR-S (butadienestyrene copolymer), Perbunan-N (butadiene-acrylonitrile copolymer), and Visitanex (polyisobutylene). The polymer was adsorbed by starting with a poor solvent composed of a mixture of toluene and methanol ; the quantity of alcohol added was just below the threshold of precipitation. The adsorbent used was a mixture of 75 per cent of lamp black (80 square meters per gram) and 25 per cent of coarse active carbon. The latter served to prevent agglomeration of the lamp black. The adsorbent was divided into three layers, of 10 grams each. At the end of the tube was a filter of fritted glass. Filtration was carried out under pressure, the rate of flow thereby being maintained constant, The polymers were characterized by their intrinsic viscosities. The molecular weights which were estimated by means of the relation, found experimentally between the molecular weight and viscosity, are only approximate, for this relation holds true only for narrow fractions.

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