Conversion of a Biorenewable Plant Oil (Anethole) to a New Fluoropolymer with Both Low Dielectric Constant and Low Water Uptake

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• 作者：Fengkai He ; Yu Gao ; Kaikai Jin ; Jiajia Wang ; Jing Sun ; Qiang Fang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：August 1, 2016
• 年：2016
• 卷：4
• 期：8
• 页码：4451-4456
• 全文大小：326K
• 年卷期：0
• ISSN：2168-0485

文摘

The conversion of a biorenewable plant oil (anethole) to a new fluoropolymer with both low dielectric constant and low water uptake is reported here. First, cationic polymerization of plant oil by using CF₃SO₃H as an initiator gave a polymer, which was then functionalized by introducing the thermocrosslinkable -OCF═CF₂ groups via a three-step procedure. The obtained fluoropolymer can be easily thermally converted to an infusible and insoluble cross-linked network exhibiting low water uptake (<0.24%, in water of 96 °C for 4 days) and low dielectric constant (<2.64 at a range of frequencies varying from 1.0 to at 30 MHz at room temperature). TGA and DMA data showed that the cross-linked network had 5 wt % loss temperature of 400 °C (in N₂) and a T_g of 160 °C, respectively. Nanoindentation tests indicated that the cross-linked film had an average hardness of 0.239 GPa and a Young’s modulus of 6.11 GPa. These results mean that the new polymer derived from biorenewable anethole is comparable to the petroleum-based materials, implying that the low k polymers widely utilized in microelectronic industry will have a new sustainable feedstock supply.