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Synthesis and properties of benzocyclobutene-terminated imide-containing cyano group
High Performance Polymers ( IF 2.1 ) Pub Date : 2019-01-06 , DOI: 10.1177/0954008318821710
Xianfeng Que 1 , Zhiming Qiu 1 , Yurong Yan 1
Affiliation  

Benzocyclobutene (BCB) resins have aroused much interest because of their excellent physical and chemical properties. Unfortunately the temperature required to induce cross-linking in typical BCBs is higher than 250°C, which restricts their applications. In this study, a novel cyano-containing BCB-terminated imide monomer was synthesized through the reaction of 1-cyano-5-amino-benzocyclobutene with 4,4′-oxydiphthalic anhydride. This monomer allows a 50–100°C lower curing temperature in comparison with typical BCBs, and it is highly soluble in various solvents and can easily convert to cured film at 150–200°C. Because of the presence of rigid imide group and strong polar cyano group, the cured film exhibits excellent mechanical strength with tensile strength up to 87.8 MPa, high glass transition temperature up to 350°C, low coefficient of thermal expansion (36.9 ppm K−1), and outstanding planarity with the average surface roughness as low as 0.26 nm.

中文翻译:

苯并环丁烯封端的含氰基的合成及性质

苯并环丁烯 (BCB) 树脂因其优异的物理和化学性能而引起了人们的极大兴趣。不幸的是,在典型的 BCB 中诱导交联所需的温度高于 250°C,这限制了它们的应用。在这项研究中,通过 1-氰基-5-氨基-苯并环丁烯与 4,4'-氧二邻苯二甲酸酐的反应合成了一种新型的含氰基 BCB 封端的酰亚胺单体。与典型的 BCB 相比,这种单体的固化温度可降低 50-100°C,并且它在各种溶剂中的溶解度很高,并且可以在 150-200°C 下轻松转化为固化膜。由于刚性酰亚胺基团和强极性氰基的存在,固化膜表现出优异的机械强度,拉伸强度高达87.8 MPa,玻璃化转变温度高达350°C,
更新日期:2019-01-06
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