The viscosity of polypropylene glycol oligomers as a function of temperature and molecular weight

Autor:	O.A. Ol'khovikov, V.M. Golubev, G.A. Gladkovskii
Rok vydání:	1973
Předmět:	Polypropylene chemistry.chemical_compound Viscosity Polypropylene glycol chemistry Volume (thermodynamics) Relaxation (NMR) Polymer chemistry General Engineering Empirical formula Physical chemistry Function (mathematics)
Zdroj:	Polymer Science U.S.S.R.. 15:2843-2849
ISSN:	0032-3950
DOI:	10.1016/0032-3950(73)90343-2
Popis:	The temperature dependence of the viscosity of linear polypropylene glycols (PPG) of various mol.wt. was studied in the range from −50 to +50°C, amongst them that of a sample in which the hydroxyl end groups had been substituted by methyl groups. The temperature-viscosity functions of all the samples were found to be described by the Williams-Landell-Ferri empirical formula. The type of dependence in this formula of the parameters on the mol.wt. and the hydroxyl group content of the PPG was well explained by the theories dealing with the relaxation processes as a consideration of the free volume.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ed83f180d8ee83ddce06f33fc48e6ac1 https://doi.org/10.1016/0032-3950(73)90343-2 Zobrazit plný text záznamu