ISSN:
0025-116X
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Poly(urethane/vinyl) block copolymers (PU-PV) were obtained in high yields by the polymerization of vinyl monomers (butyl methacrylate (BMA), ethyl acrylate (EA), and methyl methacrylate (MMA)) in the presence of polyurethane-type macroazo initiators (PUMAI). PUMAI was prepared via addition reaction of azodialcohol, dipropylene glycol and hexamethylene diisocyanate. The PU-PBMA's, as typical examples of PU-PV's were purified by solvent extraction. Characterization of the purified PU-PBMA's by 1H NMR, IR, together with extraction behavior, supported the block nature of PU-PBMA. Film tensile strength and elongation measurements in comparison with the corresponding blend samples also supported the block nature of PU-PV.
Zusätzliches Material:
5 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/macp.1993.021940817
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