Polyacid-modified composite (compomer) systems containing polymers of N-vinylpyrrolidone

Autor:	S. M. Rozzi, T. R. Clark, B. Wang, S. B. Mitra
Rok vydání:	2001
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Composite number N-Vinylpyrrolidone Polymer Thermal expansion chemistry.chemical_compound Hydrophilic polymers Rheology chemistry Fluoride release Copolymer Composite material
Zdroj:	Polymers for Advanced Technologies. 12:380-386
ISSN:	1099-1581 1042-7147
Popis:	The objective of this work was to develop polyacid-modified composite systems (compomers) suitable for dental restoratives in which high molecular weight hydrophilic (co)polymers containing variable amounts of N-vinylpyrrolidone were incorporated in small amounts. It was expected that the added polymer would become part of a semi-IPN (interpenetrating network) after the polymerizable components were cured. These systems could absorb water relatively rapidly at the early stages and thus provided good fluoride release. The effect of the addition of the high molecular hydrophilic polymers of varying compositions on the rheological, mechanical and thermal properties of the compomer systems was also investigated. The polymeric additive, significantly improved the rheological characteristics and without having any deleterious effect on the mechanical properties. The coefficient of thermal expansion of the compomers matched more closely with that of tooth structure when the N-vinylpyrrolidone content of the polymeric additives was increased. Copyright © 2001 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f107795fda956a2b9d68df299d5d6fc1 https://doi.org/10.1002/pat.120 Zobrazit plný text záznamu Plný text