China Plastics ›› 2022, Vol. 36 ›› Issue (3): 48-52.DOI: 10.19491/j.issn.1001-9278.2022.03.008

• Materials and Properties • Previous Articles     Next Articles

Preparation of high⁃transparency polyimide film by high⁃temperature polycondensation method

LU Chunyan1,2(), WANG Gang1,2, LIU Shuai1,2, ZHU Tianrong2, LIU Yun2, WANG Haiping2, HU Siqian1,2()   

  1. 1.Key Laboratory of Optoelectronic Chemical Materials and Devices,Ministry of Education,Jianghan University,Wuhan 430056,China
    2.School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China
  • Received:2021-11-23 Online:2022-03-26 Published:2022-03-25

Abstract:

A series of polyimide (PI) films were synthesized through high?temperature melt polycondensation with different mole ratio of diamine monomer 1,3?bis(4?aminophenoxy)benzene, 2,6?diaminotoluene (2,6?DAT) and dianhydride monomer 4,4'?oxydiphthalic anhydride. The resulting PI products were characterized with infrared spectroscopy, UV?vis spectroscopy, DSC, TGA, and solubility test. The results show that the obtained PI molding powders and films were imidized completely, and the resulant PI films exhibited maximum transmittance of more than 80 %, a maximum glass transition temperature of approximately 290 ℃, and a residual carbon yield of more than 55 wt% at 800 ℃. Almost all molding powders were dissolved completely in normal organic solvents like N,N?dimethylacetamide, N?methylpyrroli?done, N,N?dimethylformamide, and dichloromethane.

Key words: polyimide, high?temperature melt polycondensation, ternary polymerization, molding powder, film

CLC Number: