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Synthesis and characterization of novel organosilicon‐modified polyurethane
Author(s) -
Zhang Yihe,
Shang Jiwu,
Lv Fengzhu,
Chu Paul K.
Publication year - 2012
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.36245
Subject(s) - thermogravimetric analysis , materials science , polyurethane , fourier transform infrared spectroscopy , polydimethylsiloxane , organosilicon , prepolymer , scanning electron microscope , thermal stability , ultimate tensile strength , dynamic mechanical analysis , chemical engineering , composite material , differential scanning calorimetry , polymer chemistry , polymer , engineering , physics , thermodynamics
Organosilicon‐modified polyurethane have been synthesized using the prepolymer method and characterized by Fourier infrared (FTIR) spectroscopy, wide angle X‐ray diffraction (WAXD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA), solvent resistance analysis, and stress–strain tests. The FTIR spectra show that the polyurethane is fully reacted and polydimethylsiloxane (PDMS) is chemically incorporated into the copolymer. SEM reveals a multiphase structure with surface cracking and thermal analysis indicates that the heat resistance properties are better when the PDMS concentration is low. According to the solvent resistance, water and acetone uptake decreases when the PDMS content is less than 4 wt % while the ethanol uptake changes indistinctively. The mechanical properties of the films are also discussed. A tensile strength up to 6 wt % has the largest effect while the elongation at break decreases. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci 125:1486–1492, 2012