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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 3
BKCSDE 32(3)
March 20, 2011

Title	Microwave Effect on Curing of Waterborne Polyurethane
Author	Hoikwan Lee*, Chris. Y. Fang, Carlo. G. Pantano, Wonho Kang
Keywords	Curing, Microwave heating, Polyurethane, Coating, Caustic resistance
Abstract	Spin-coated waterborne polyurethane to protect glass surface from environmental attacks was cured by using microwave heating. The effect of microwave heating on the reaction kinetics, chemical durability, and transmittance of polyurethane was investigated. In comparison to the conventional heating the results show that the microwave heating substantially accelerates the curing process of waterborne polyurethane and the total time for the completion of the reaction is only 1/7 of that in the conventional process. The microwave cured sample showed an excellent caustic resistance compared to conventional cured one. It means that microwave heating produces dense structure during curing process. The dense structure does not affect to the transmittance in the visible region.
Page	961 - 963
Full Text	PDF

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