Premium
Characterization and thermal degradation of polyimides derived from ODPA and several alicyclic‐containing diamines
Author(s) -
Chen ChaoFeng,
Qin WeiMin,
Huang XiangAn
Publication year - 2008
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21066
Subject(s) - alicyclic compound , thermogravimetric analysis , cyclohexane , thermal stability , materials science , polyimide , glass transition , fourier transform infrared spectroscopy , degradation (telecommunications) , activation energy , polymer chemistry , monomer , diamine , nitrogen , chemical engineering , organic chemistry , polymer , chemistry , composite material , telecommunications , computer science , engineering , layer (electronics)
Thermal properties of polyimides with main chain containingalicyclic units derived from 3,3′ 4,4′‐oxydiphthalic anhydride (ODPA) and several alicyclic‐ containing diamine monomers, including 1,4‐bis (4‐aminophenoxymethylene) cyclohexane (BAMC), 1,4‐bis (3‐aminophenoxymethylene) cyclohexane (mBAMC), 1,4‐bis (4‐aminobenzoyoloxymethyl) cyclohexane (BAZMC), and 1,4‐bis (3‐aminobenzoyoloxymethyl) cyclohexane (mBAZMC) were characterized in detail. The thermal stability, apparent activation energy, and evolved gas analysis of these polyimides were done using thermogravimetric analysis (TGA) coupled with Fourier transform infrared (FTIR) spectroscopy. Experimental results indicated that the resulting polyimides showed fairly high thermal stability, no weight loss was detected before a temperature of 400°C in nitrogen, and the values of glass‐transition temperature of them were in the range of 134–181°C. Activation energy for the initial thermal degradation of polyimide derived from ODPA and mBAMC in nitrogen were 166 and 162 kJ/mol in two different methods. The TG‐IR results represented that the major evolved products from the nonoxidative thermal degradation were detected to be hydrocarbons, CO, CO 2 , H 2 O, and aromatic compounds. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers.