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Titolo:
Miscibility and crosslinking of polybutadiene-based polyurethanes
Autore:
Pekar, M; Kopecky, P;
Indirizzi:
Brno Univ Technol, Fac Chem, Inst Phys & Appl Chem, Brno 61200, Czech Republic Brno Univ Technol Brno Czech Republic 61200 , Brno 61200, Czech Republic
Titolo Testata:
COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS
fascicolo: 11, volume: 65, anno: 2000,
pagine: 1820 - 1832
SICI:
0010-0765(200011)65:11<1820:MACOPP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEGMENTED POLYURETHANES; SOFT SEGMENTS; GEL POINT; ELASTOMERS;
Keywords:
crosslinking; miscibility; polybutadiene; polyurethanes; rheokinetics; polymers; macromolecules;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
13
Recensione:
Indirizzi per estratti:
Indirizzo: Pekar, M Brno Univ Technol, Fac Chem, Inst Phys & Appl Chem, Purkynova 118, Brno 61200, Czech Republic Brno Univ Technol Purkynova 118 Brno Czech Republic 61200 public
Citazione:
M. Pekar e P. Kopecky, "Miscibility and crosslinking of polybutadiene-based polyurethanes", COLL CZECH, 65(11), 2000, pp. 1820-1832

Abstract

Rheokinetics of polybutadiene-based polyurethanes was studied. Sixteen mixtures differing in the miscibility of reactive components and hard segmentscontents were prepared. Regardless of the miscibility of the components, the rheokinetics behaviour is qualitatively very similar. The viscous response part is formed and finished much earlier than the elastic part. The quantitative dissimilarities, caused by cooperative effect of miscibility and differences in reactivity, are described. Using a well miscible initial mixture need not give the best results as a reactive crosslinker can easily react with isocyanate and separate from the rest of the reaction mixture thus impairing the final phase structure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 09:44:00