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Title: | Synthesis and FTIR spectroscopic investigation of the UV curing kinetics of telechelic urethane methacrylate crosslinkers based on the renewable resource-cardanol |
Authors: | Rekha, N Asha, S K |
Keywords: | UV curing Hydrogen bonding Infrared spectroscopy cardanol Curable polyurethane acrylates Light-induced polymerization |
Issue Date: | 2008 |
Publisher: | Wiley |
Citation: | Journal of Applied Polymer Science 109(5):2781-2790;05 Sep 2008 |
Abstract: | UV curable telechelic urethane-methacrylate crosslinkers based on the natural resource-cardanol was synthesized in a one pot synthetic step involving end capping of isophorone diisocyanate with one equivalent of hydroxyethyl methacrylate followed by condensation with cardanol. The structures of the resins were characterized by H-1 and C-13 NMR, fourier transform infrared (FTIR) and Matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) spectroscopies and size exclusion chromatography (SEC). The curing process and double bond conversion in presence of 2,2-diethoxy acetophenone as photo-initiator upon UV irradiation was followed by Fourier transform infrared spectroscopy. These hydrogen bonded crosslinkers based on cardanol and its derivatives had higher double bond conversion when compared to a nonhydrogen bonding standard such as hexanediol diacrylate (HDDA) under identical conditions. The temperature effects on the hydrogen bonding were investigated, and a decrease in the extent of double bond conversion with increase in temperature was observed for the telechelic urethane-methacrylate crosslinkers whereas a steady increase in the curing rate was observed for HDDA. This gives direct indication of the influence of hydrogen bonding on the curing process. |
URI: | http://ir.niist.res.in:8080/jspui/handle/123456789/1743 |
ISSN: | 0021-8995 |
Appears in Collections: | 2008 |
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2008_0095.PDF Restricted Access | 380.44 kB | Adobe PDF | View/Open Request a copy |
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