Determination of molecular weight of polyvinylpyrrolidone

Wiley - Tập 10 Số 4 - Trang 371-378 - 1953
H. P. Frank1, G. Lévy2
1Institute of Polymer Research, Polytechnic Institute of Brooklyn
2Schenley Laboratories, Inc.

Tóm tắt

AbstractThe molecular weight of selected polyvinylpyrrolidone samples was determined by light scattering and by osmotic pressure in methanol. The corresponding limiting viscosity numbers were also determined, as well as the limiting viscosity number of the same samples in water. The data relating to the methanolic system conform with theory and the values for K and α in [η] = KMα were determined. The data relating to aqueous solutions do not show such conformity but an unexplained dependence on the degree of homogeneity of the samples. Nevertheless some empirical constants were deduced which may aid in industrial practice in which aqueous viscosity measurements are usual.

Từ khóa


Tài liệu tham khảo

10.1007/978-3-642-53156-9

U. S. Patents 2 265 450 and 2 335 454.

Copenhaver J. W., 1949, Acetylene and Carbon Monoxide Chemistry

10.1021/ac60071a024

10.1002/macp.1951.020060118

10.1021/ja01209a509

10.1364/JOSA.40.000768

10.1063/1.1747783

10.1002/macp.1951.020060104

F. R.Eirich address at the Symposium on Water Soluble Polymers of Biological Interest Polytechnic Institute of Brooklyn April 1951.

10.1002/pol.1951.120070511

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Wiley

Tập 10 Số 4

371-378

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