Inhomogeneity of hydrolytic polyamide 6 with respect to the average molecular mass

Autor:	L. N. Mizerovskii, Yu. M. Bazarov, V. G. Silant’eva
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Materials science Molecular mass General Chemical Engineering Dispersity Thermodynamics General Chemistry Polymer Standard deviation Hydrolysis Crystallography chemistry Polyamide General Materials Science Spinning
Zdroj:	Fibre Chemistry. 40:430-433
ISSN:	1573-8493 0015-0541
DOI:	10.1007/s10692-009-9084-3
Popis:	The point of view was advanced that in spinning fibres from polymer melts, the molecular inhomogeneity of the melts is not due to the polydispersity of the polymer but to important differences in the average molecular mass of the individual granules. Using the example of three industrial samples of hydrolytic PA 6, it was shown that the standard deviation of the average molecular mass of the polymer with respect to the individual granules from its mean statistical values is at the level of 10–11% for a practically significant (for up to several percent of granules) deviation of 30–50%. The use of samples of PA 6 with the mass provided by GOST 18245–72, OST 6-06-S9-76, and GOST 11034-82 in determining the viscosity a solution of the polymer in H2SO4 allows correctly estimating its average molecular mass but makes it impossible to obtain reliable information relative to the real degree of inhomogeneity of the granulate based on this index.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e4ade9409c6e9f852e08c0f4c9eac8a6 https://doi.org/10.1007/s10692-009-9084-3 Zobrazit plný text záznamu Plný text ve formátu PDF