ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A series of ultraviolet-induced photocrosslinkable polyurethane acrylates was synthesized. They are composed of a polyether [poly(propylene oxide) or poly(tetramethylene oxide)] soft segment and two terminal hard segments derived from 2-hydroxyethyl methacrylate and a diisocyanate. Based on stress-strain and DSC measurements of their UV-cured materials, relations between their structure and physical properties were investigated systematically. The results show that parameters which increase the content of hard segments and the crosslinking density of UV-cured materials lead to an increase in Young's modulus and stress at break accompanied by a decrease in elongation at break. The glass transition temperature of the polyether soft segment is determined mainly by the type and molecular weight of the polyether, due to a two-phase morphology.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1991.021920116
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