Synthesis and characterization of novel highly soluble and optical transparent polyimides containing tert-butyl and morpholinyl moieties

• DOI: 10.1007/s10965-015-0820-5
• Publication Date: 2015-08-07T11:37:37Z
• Authors: Xiaohua Huang; Mei Mei; Chanjuan Liu; Xianglin Pei; Chun Wei
• Keywords: Thermal Stability; Tetrahydrofuran; Dichloromethane; Acetamide

A series of novel organo-soluble and optical transparent polyimides were synthesized via conventional one-step polycondensation from a novel diamine, 3,3′-diterbutyl-4,4′-diaminodiphenyl-4″-morpholinophenylmethane (TAMPM) and various commercial aromatic dianhydrides. The structures of monomer and polymers were confirmed by FT-IR and NMR. The solubility, thermal stability, optical transparency, dielectric and hydrophobic properties of polyimides were investigated. The results showed polymers presented excellent solubility in common organic solvents, such as N,N-dimethylformamide (DMF), N,N-dimethyl acetamide (DMAc), dimethyl sulfoxide (DMSO), N-methyl-2-pyrrolidone (NMP), chloroform (CHCl3), tetrahydrofuran (THF) and dichloromethane (CH2Cl2). The polymers exhibited prominent thermal stability and high optical transparency with the glass transition temperature (T g) in the range of 311–355 °C, and the cutoff wavelengths in the range of 287–344 nm. Furthermore, all of the polymers also presented low dielectric constants in the range of 2.85–3.16 at 1 MHz, and outstanding hydrophobic properties with the contact angle in the rang of 85.1–94.2 o.