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题名:	Studies of Fluorine-Containing Bismaleimide Resins Part I: Synthesis and Characteristics of Model Compounds
作者:	疏偉傑 Wang, Zen-You Ho, Jiau-Ching Shu, Wei-Jye
关键词:	fluorine-containing bismaleimide resins low-k materials dielectric constant
日期:	2010-12
上传时间:	2014-12-29 15:43:22 (UTC+8)
摘要:	A series of fluorine-containing bismaleimide(FBMI) monomers are synthesized by a 3-step reaction for using as the applications of low-k materials. The synthesized FBMI monomers are characterized by the 1H,13C, 19F nuclear magnetic resonance (NMR) spectroscopy and element analysis. These FBMI monomers react with free radical initiator or self-cure to prepare FBMI-polymers. All the self-curing FBMI resins have the glass transition temperatures (Tg) in the range of 128–141 C and show the 5% weight loss temperatures (T5%) of 235–293 C in nitrogen atmosphere. The higher heat resistance of selfcuring FBMI resin relative to FBMI-homopolymer is due to its higher crosslinking density. The FBMI resins exhibit improved dielectric properties as compared with commercial bismaleimide (BMI) resins with the dielectric constants(Dk) lower than 2.49, which is related to the low polarizability of the CAF bond and the large free volume of CF3 groups in the polymers. Besides, the flame retardancy of all these FBMI resins could be enhanced via the introduction of Br-atom.
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