New telechelic polymers and sequential copolymers by polyfunctional initiator-transfer agents (inifers). VII. Synthesis and characterization of α,ω-di(hydroxy)polyisobutylene |
| |
| Authors: | Bla Ivn Joseph P Kennedy Victor S C Chang |
| |
| Institution: | Béla Iván,Joseph P. Kennedy,Victor S. C. Chang |
| |
| Abstract: | A new telechelic polyisobutylene diol, HO? CH2? PIB? CH2? OH, carrying two terminal primary hydroxyl end groups has been prepared from α,ω-di(isobutenyl)polyisobutylene, CH2?C(CH3)- CH2? PIB? CH2C(CH3)?CH2, by regioselective hydroboration followed by alkaline hydrogen peroxide oxidation. Infrared (IR) spectra, 1H-NMR analysis of the pure and silylated products, and ultraviolet (UV) spectra of phenylisocyanate-treated diols indicate quantitative yields and two ? CH2OH termini per polyisobutylene chain. The viscosity of HO? CH2? PIB? CH2? OH is higher than that of the starting α,ω-diolefin. The telechelic diol prepolymer opens new avenues to the synthesis of many new materials, e.g., polyurethanes. |
| |
| Keywords: | |
|
|
