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Preparation of Poly(urethane/vinyl) Block Copolymers Initiated by Polyurethane‐type Macroazo Initiators by Kinoshita, Hiroshi ;Tanaka, Nobuo ;Araki, Takeo ;Ooka, Masataka is a Chemistry article available to read on EtoBox.

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## Abstract 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 ^1^H 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.

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Author

Kinoshita, Hiroshi ;Tanaka, Nobuo ;Araki, Takeo ;Ooka, Masataka

Publisher

Wiley (John Wiley & Sons); Wiley (ISSN 0025-116X)

Published

1993

Language

EN

Field

Chemistry (Physical Sciences)