Physical and chemical cross-linking effects in polyurethane elastomers

 
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1990 (EN)
Physical and chemical cross-linking effects in polyurethane elastomers (EN)

Kontou, E (EN)
Niaounakis, M (EN)
Kefalas, V (EN)
Spathis, G (EN)

N/A (EN)

A series of polyester-urethane block copolymers of various molecular weights was prepared via a two-step polymerization process. The prepolymer composition was kept constant in all the samples, while the NCO/OH ratio during the chain extension was varied from 0.9 to 1.2. Chemical and physical cross-linking effects were studied by means of F.T.I.R spectroscopy, swelling, and elastic behavior. Equilibrium stress-strain measurements and tensile-retraction tests were carried out to examine the elastomeric behavior of the materials tested. The extent of agreement between microscopic and macroscopic behavior was then evaluated. © 1990 Steinkopff. (EN)

journalArticle

tensile retraction (EN)
Segmented Polyurethanes (EN)
Polyester-Urethane Elastomers (EN)
cross-linking, chemical and physical (EN)
Materials Testing--Tensile Tests (EN)
stress-strain-measurements (EN)
Polyurethane-block-copolymers (EN)
Spectroscopy, Infrared (EN)
Tensile Retraction (EN)
IR-spectroscopy (EN)
Polyurethanes (EN)
Thermoplastic Elastomers--Physical Chemistry (EN)

Εθνικό Μετσόβιο Πολυτεχνείο (EL)
National Technical University of Athens (EN)

Colloid & Polymer Science (EN)

1990


Steinkopff-Verlag (EN)



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