Citation:
ZHOU Tingting, YANG Jianjun, WU Qingyun, WU Mingyuan, ZHANG Jianan. Preparation of Silicone Modified Sulfonated Polyurethane/acrylic Composite Emulsion[J]. Chinese Journal of Applied Chemistry,
;2013, 30(2): 143-147.
doi:
DOI:10.3724/SP.J.1095.2013.20105
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A prepolymer was prepared by reacting the obtained sulfonated polyester polyol with isophorone diisocyanate(IPDI) and trimethylolpropane(TMP).The seed emulsion containing viny and silicone was prepared by end-capping with bifunctional monomer β-hydroxyethyl methacrylate(HEMA) and modification by silane coupling agent γ-aminopropyl triethoxysilane(KH550).The silicone modified sulfonated polyurethane/acrylic composite emulsion was obtained by mixing methyl methacrylate(MMA) and butyl acrylate(BA) monomers.The silicone modified sulfonated polyurethane/acrylic composite emulsion was characterized by infrared spectroscopy.The core-shell structure of the composite emulsion was confirmed by the transmission electron microscopy.Thermogravimetric analysis showed that an increase of 20℃ of the largest thermal mass loss temperature could be observed for the organic silicon and acrylic modified films.Meanwhile,the crystallinity was decreased as revealed by X-ray diffraction result,which could help to improve the toughness of the film.In addition,when the organic silicon content is 1.9%,the tensile strength of the film is up to 25.03 MPa,its elongation at break is 328%,and has the lowest water absorption.
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Keywords:
- polyester polyol,
- waterborne polyurethane,
- acrylates,
- silicone
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