Kinetic Aspects of Hydrolytic Resistance of Avtocan and Biomer Segmented Polyurethanes

Autor:	N. V. Trosteniuk, G. E. Zaikov, K. Z. Gumargalieva
Rok vydání:	2000
Předmět:	Materials science Polymers and Plastics General Chemical Engineering Buffer solution Decomposition Analytical Chemistry chemistry.chemical_compound Hydrolysis Reaction rate constant Chemical engineering chemistry Siloxane Polymer chemistry Copolymer Degradation (geology) Chemical decomposition
Zdroj:	International Journal of Polymeric Materials and Polymeric Biomaterials. 46:655-661
ISSN:	1563-535X 0091-4037
DOI:	10.1080/00914030008033903
Popis:	Degradation of film samples, representing of segmented polyesterurethanes (Avcotan and Biomer) in water and acidic solutions (acidic phosphastes) was investigated. We found, that Avcotan, representing copolymers of segmented polyurethanes with polydimethyl-siloxane, degradated in water with noticeable rate, whereas Biomer samples were found hydrolytically stable. It was shown, that degradation from Avcotan sample surface was stipulated by decompostiion of siloxane component as a result of hydrolysis. The values of decomposition rate constant, allow us to predict the duration of degradation for surface layers of polyesterurethanes (Avcotan), responsible for thromboresistance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4704565cabf0bcf614fa2fb974fb4185 https://doi.org/10.1080/00914030008033903 Zobrazit plný text záznamu