Synthesis of optically transparent copolyimides based on alicyclic and fluorine-containing diamine

期刊论文
发表日期：

2024年7月1日

查看全文

I. A. Novakov,
D. V. Zavyalov,
E. N. Savelyev,
E. A. Alykova,
A. M. Pichugin,
M. A. Nakhod,
E. M. Sukhareva,
A. D. Dubinina,
E. I. Farkhutdinova

摘要

It was shown that copolyimides based on adamantane-containing diamine and dianhydrides of 2,3,3′,4′-biphenyltetracarboxylic acid (a-BPDA) and 5,5′-(1,1,1,3,3,3-hexafluoropropane-2,2-diyl)bis(2-benzofuran-1,3-dione) (6FDA) are characterized by good thermal-oxidative properties (T_5% = 465–485 °C) and a high optical transparency (T₄₀₀ = 60–80%) in comparison with copolyimides based on the same dianhydrides and 2,2′-bis(trifluoromethyl)biphenyl-4,4′-diamine (TFBA), containing bulky trifluoromethyl fragments (T₄₀₀ = 38–67%).