Effect of the initial oligoglycol molecular weight and filling with powdered silica on the visco-elastic properties and supermolecular structure of network polyurethanes

Autor:	T.E. Lipatova, Sh.G. Vengeroskaya, N.I. Korzhuk, L.S. Sheinina, V.F. Babich
Rok vydání:	1978
Předmět:	chemistry.chemical_classification chemistry.chemical_compound Filler (packaging) Materials science chemistry Phase (matter) Polymer chemistry General Engineering Polymer Composite material Trimethylolpropane Viscoelasticity Fumed silica
Zdroj:	Polymer Science U.S.S.R.. 20:2305-2315
ISSN:	0032-3950
DOI:	10.1016/0032-3950(78)90400-8
Popis:	An investigation to determine visco-elastic properties has been carried out for a series of polyurethanes which were prepared using polyoxypropylene glycols of differing MW, toluylene-2,4-diisocyanate and trimethylolpropane, along with those filled with different amounts of powdered silica (aerosil). The results were examined and compared with supermolecular structure. It was found that an increase both in MW of an initial oligoglycol and in the filler content resulted in the formation of a smaller globular and more uniform structure which in a regular way alters the viscoelastic properties of the polymers examined. The results obtained have been interpreted in the light of concepts concerning different rigidities of interglobular phase and globular formations, in view of which the latter may be regarded as a filler.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ece6298cc1ba1e5ea9e38286e8944fc9 https://doi.org/10.1016/0032-3950(78)90400-8 Zobrazit plný text záznamu