文献类型：期刊文献

英文题名：Facile Strategy for Preparing a Rosin-Based Low-k Material: Molecular Design of Free Volume

作者：Fu, Fei[1,2] Shen, Minggui[1] Wang, Dan[1] Liu, He[1] Shang, Shibin[1] Hu, Fei-Long[3] Song, Zhanqian[1] Song, Jie[4]

第一作者：Fu, Fei

通信作者：Shen, MG[1]

机构：[1]Chinese Acad Forestry, Key & Open Lab Forest Chem Engn, Natl Engn Lab Biomass Chem Utilizat, Key Lab Biomass Energy & Mat,Inst Chem Ind Forest, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[3]Guangxi Univ Nationalities, Guangxi Collaborat Innovat Ctr Chem & Engn Forest, Guangxi Key Lab Chem & Engn Forest Prod, Nanning 530006, Peoples R China;[4]Univ Michigan, Dept Chem & Biochem, Flint, MI 48502 USA

年份：0

外文期刊名：BIOMACROMOLECULES

收录：;EI(收录号：20222812335712);Scopus(收录号：2-s2.0-85133520986);WOS:【SCI-EXPANDED(收录号:WOS:000819271500001)】；

基金：We gratefully acknowledge the financial support from the Guangxi Key Laboratory of Chemistry and Engineering of Forest Products (GXFK2003) and Key R&D Projects of Guangxi Zhuang Autonomous Region (no. AB20238008).

语种：英文

摘要：Low-k dielectrics are urgently needed in modern integrated circuits. The introduction of free volume instead of porous structures has become a powerful strategy to reduce the k value. According to this strategy, the biomass resource rosincontaining hydrogenated phenanthrene ring was introduced into benzocyclobutene (BCB) resin to reduce the k value; then a rosinbased BCB monomer was successfully synthesized. Meanwhile, the BCB monomer without a rosin skeleton was prepared. After converting the monomers into thermo-crosslinked materials, notably that the rosin skeleton has a great influence on the free volume and k value of the material. The fractional free volume and k value of the former are 26% and 2.44, respectively, and those of the latter are 14% and 2.84, respectively. In addition, the distances between molecular chains and the density of the former are 0.60 nm and 1.06 g cm(-3), respectively; those of the latter are 0.56 nm and 1.28 g cm(-3), respectively. These data show that introducing hydrogenated phenanthrene rings occupies part of the space and hinders the packing of molecular chains, which increases the distance between molecular chains and reduces the density of the polymer, resulting in an increasing free volume and a reducing k value. Notably that introducing hydrogenated phenanthrene rings cannot affect other properties of the material. Therefore, this research indicates that introducing rosin skeletons can prepare high-performance materials, which provide some promising low-k materials for the development of electronics and microelectronics.