Formation and properties of physical gels from saturated poly(ester-urethane) in styrene

Autor:	Michel Feve, Fu‐Cai Wang, Jean-Pierre Pascault
Rok vydání:	1990
Předmět:	Gel point Materials science Polymers and Plastics Organic Chemistry Condensed Matter Physics Oligomer Catalysis Styrene Polyester Chain length chemistry.chemical_compound Rheology chemistry Polymer chemistry Materials Chemistry
Zdroj:	Makromolekulare Chemie. Macromolecular Symposia. 39:125-129
ISSN:	0258-0322
DOI:	10.1002/masy.19900390110
Popis:	A gel was obtained from reacting a α, ω–hydroxy-terminated polyester oligomer and a diisocyanate in styrene. Two types of morphologies were possible which are dependent on the quantity of catalyst. The rheological experiments led to the discovery that the “gel point” was not well defined and that the gel formation was a gradual process. A certain chain length was necessary for the appearance of the gel properties. The physical cross-links could be destroyed and re-formed.
Databáze:	OpenAIRE
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