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Synthesis of bis‐triethoxysilane endcapped polyurethane/urea and its self‐assembly morphologies with the assistance of hydrogen ion
Author(s) -
Gao Feng,
Huang Shiqiang,
Ku Bin,
Chen Ming,
Wu Jun,
Wang Jinzhao
Publication year - 2012
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1925
Subject(s) - triethoxysilane , materials science , polyurethane , polyethylene glycol , fourier transform infrared spectroscopy , urea , polymer chemistry , peg ratio , chemical engineering , nanoparticle , amine gas treating , nuclear chemistry , organic chemistry , nanotechnology , composite material , chemistry , finance , engineering , economics
A type of bi‐triethoxysilane endcapped polyurethane/urea (SPU) with well‐defined structure was synthesized through the reaction of polyethylene glycol (PEG), 2, 4‐toluene diisocyanate (TDI) and bis‐[trimethoxysiylpropyl]amine (DB‐520). The structure of the resultant product was confirmed by Fourier transform infrared (FT‐IR) and Nuclear magnetic resonance ( 1 HNMR). Different SPU nanoparticles were obtained with the assistance of hydrogen ion, and their morphologies were characterized by combination of transmission microscopy (TEM) and FT‐IR. The results showed that with increasing the concentration of hydrogen ions, the ratio of condensation accordingly increased, accompanying with the nanoparticle's morphology change from sphere to rod. Furthermore, the dispersion mechanism of SPU chains in protonic solution and the arrangement of molecular chains in hybrid particles were proposed. Copyright © 2011 John Wiley & Sons, Ltd.