Room temperature polymerization of N-vinylcarbazole in tetrahydrofuran |
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Authors: | Email author" target="_blank">Won?Seok?LyooEmail author Jin?Woo?Kwak Seok?Kyun?Noh Dae?Heum?Kim Jinwon?Lee Nakjoong?Kim Ki?Hong?Park Chul?Joo?Lee |
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Institution: | (1) School of Textiles, Yeungnam University, 712-749 Gyeongsan, Korea;(2) School of Chemical Engineering and Technology, Yeungnam University, 712-749 Gyeongsan, Korea;(3) Department of Chemical Engineering, Kwangwoon University, 139-701 Seoul, Korea;(4) Department of Chemistry, Hanyang University, 133-791 Seoul, Korea;(5) Electronic Materials and Devices Research Center, Korea Institute of Science and Technology, P. O. Box 131, 130-650 Cheongryang, Seoul, Korea |
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Abstract: | N-Vinylcarbazole (VCZ) was solution-polymerized in tetrahydrofuran (THF) at 25, 35, and 45 °C using a room temperature initiator,
2,2′-azobis(2,4-dimethylvaleronitrile) (ADMVN); the effects of amount of solvent, polymerization temperature, and initiator
concentration were investigated. On the whole, the experimental results corresponded to predicted ones. Room polymerization
temperature using ADMVN proved to be successful in obtaining poly(N-vinylcarbazole) (PVCZ) of high molecular weight with small
temperature rise during polymerization, nevertheless of free radical polymerization by azoinitiator. The polymerization rate
of VCZ in THF was proportional to the 0.47 power of ADMVN concentration. The molecular weight was higher and the molecular
weight distribution was narrower with PVCZ polymerized at lower temperatures. For PVCZ prepared in THF at 25 °C using ADMVN
concentration of 0.00005 mol/mol of VCZ, weight-average molecular weight of 221,000 was obtained, with polydispersity index
of 2.05, and degree of lightness converged to about 99 %. |
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Keywords: | VCZ Solution-polymerized THF Room temperature PVCZ |
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