ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
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.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1993.021940817
Permalink