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http://dx.doi.org/10.17702/jai.2015.16.4.146

Olefin Metathesis Curing Reaction of Essential Oils in Korean Dendropanax Lacquer  

Kim, Mi Ri (Department of Applied Chemistry, Kyungpook National University)
Lee, Won Hwi (Surface Technology Research Group, POSCO)
Yoo, Hye Jin (Surface Technology Research Group, POSCO)
Kim, Jong Sang (Surface Technology Research Group, POSCO)
Cheong, In Woo (Department of Applied Chemistry, Kyungpook National University)
Publication Information
Journal of Adhesion and Interface / v.16, no.4, 2015 , pp. 146-151 More about this Journal
Abstract
Raw sap of essential oil in Korean Dendropanax lacquer was extracted with ethanol, and which was cured by using ROMP (ring opening metathesis polymerization, one of olefin metathesis). Curing behavior with subsequent film properties were studied and compared with conventional curing (under ambient conditions) and UV photo curing. The compositional changes of major ingredients in the lacquer before and after curing were studied by using GC-MS (gas chromatography mass spectrometry). ROMP-cured coating film showed higher gel contents (40%) as compared to those of conventional (8%) and UV curing (25%). ROMP curing with 2 wt% Grubbs' catalyst at $100^{\circ}C$ completed curing reaction within 2 h, which was much faster than that of conventional curing. The quality of coating film prepared with ROMP was more homogeneous and wrinkle-free as compared with that with UV curing. It was found that major ingredients of sesquiterpenes, such as ${\alpha}$-selinene, ${\beta}$-selinene, and ${\delta}$-cadinene were reacted in ROMP, as well as polyacetylenes.
Keywords
Dendropanax lacquer; ROMP; Grubbs' catalyst; Sesquiterpenes;
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