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Preparation and properties of water‐borne polyurethane with branched straight aliphatic chains
Author(s) -
Liu Fang,
Han Dong
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33689
Subject(s) - polyurethane , emulsion , polymer chemistry , particle (ecology) , particle size , materials science , chemical engineering , side chain , water resistance , fourier transform infrared spectroscopy , chemistry , organic chemistry , composite material , polymer , oceanography , engineering , geology
Abstract Water‐borne polyurethane with branched straight aliphatic chains (CWPU) was prepared and characterized by FTIR and TEM. The relationship between structure and water‐resistance of CWPU was studied. The results showed that the particle size of CWPU emulsion increases and the round particle turns into the spindle‐shaped particle with increasing of content of branched straight aliphatic chains. However, the particle size of CWPU emulsion is not sensitive to the increases of length of branched straight aliphatic chains. The water‐resistance and hydrophobic property of CWPU film increase with the increase of content and length of branched straight aliphatic chains. It is attributed to the hydrophobic layer of aliphatic chains enriched on the surface of CWPU film. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011