Polymerization of euphorbia oil with Lewis acid in carbon dioxide media

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• 作者：Zengshe Liu ; ^{kevin.liu@ars.usda.gov} ; Shailesh N. Shah¹ ; Roque L. Evangelista ; Terry A. Isbell
• 关键词：Euphorbia oil ; Ring-opening polymerization ; Carbon dioxide ; Boron trifluoride diethyl etherate
• 刊名：Industrial Crops and Products
• 出版年：2013
• 期刊代码：56_09266690
• 类别：abs
• 出版时间：January, 2013
• 卷：41
• 期：Complete
• 页码：10-16
• 文件大小：831 K

摘要

Boron trifluoride diethyl etherate (BF₃路OEt₂) catalyzed ring-opening polymerization of euphorbia oil (EuO), natural epoxy oil, in liquid carbon dioxide was conducted in an effort to develop useful vegetable oil based polymers. The resulting polymers (RPEuO) were characterized by FTIR, ¹H NMR, ¹³C NMR, solid state ¹³C NMR spectroscopies, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and gel permeation chromatography (GPC). The results indicated that the ring-opening polymerization of EuO occurred at mild conditions, such as at room temperature, and a subcritical carbon dioxide (CO₂) pressure of 65.5 bar. The formed RPEuO materials were cross-linked polymers. The glass transition temperatures of these polymers ranged from 鈭?5.0 to 鈭?2.7 掳C. TGA results showed that the RPEuO polymers were thermally stable at temperatures lower than 220 掳C and significant decomposition mainly occurred above 340 掳C.