- 吳林波 教授
- 浙江大學(xué)化工系聚合物工程研究所
- 網(wǎng)址: wulinbo.polymer.cn 訪問量:1293560
- MedSci 臨床研究教育培訓(xùn)與學(xué)術(shù)服務(wù)平臺
- Philippe Dubois教授課題組,比利時蒙斯大學(xué)聚合物與復(fù)合材料實驗室
- 中國塑協(xié)降解塑料專業(yè)委員會
- 中國聚合物網(wǎng)
- 中國流變網(wǎng)
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- 化學(xué)化工論壇
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關(guān)鍵字:eugenol, epoxidation, low viscosity, dielectric properties, flame retardant
論文來源:期刊
具體來源:ACS Sustainable Chemistry & Engineering 2018, 6 (7), pp 8856–8867 DOI: 10.1021/acssuschemeng.8b01212
發(fā)表時間:2018年
Recent years have witnessed significant advances in biobased epoxy resins to replace their petroleum-based counterparts, especially diglycidyl ether of bisphenol A type epoxy resin
(DGEBA). However, for meeting a great variety of the requirements, long-standing challenges include environmentally friendly preparation of epoxy resin with few toxic byproducts and
improving their properties. Herein, we report a facile method to synthesize new silicone-bridged difunctional epoxy monomers in high yield. They are derived from naturally occurring eugenol by introducing the methylsiloxane and phenylsiloxane linkers of different chain lengths into their molecular backbones. These synthesized liquid epoxy monomers have definitive molecular structure with high purity. These silicone-bridged difunctional epoxy monomers exhibit much lower viscosity (<2.5 Pa s) than commercial DGEBA epoxy (10.7 Pa s) suitable for composites and prepregs. After curing, they exhibit a dielectric permittivity as low as 2.8 and good intrinsic flame retardancy with LOI value higher than 31, far outperforming DGEBA. All these advantages are stemmed from their siloxane-contained segments characterized by low polarity, very high dissociation energy, helical molecular structure, and high molecular volume. Overall, this work provides a very facile and scalable route access to a family of the multifunctional eugenol-based epoxy monomers with low dielectric constant and enhanced flame retardancy.