Study on Thermal Degradation of a Novel Polyimide with Main Chain Containing Alicyclic Units
The thermal degradation behaviour of a novel polyimide with main chain containing alicyclic units was studied by the combination of thermogravimetric analysis and infrared spectrometry (TG/IR) technique. Meanwhile, the thermal imidization of poly (amic acid) precursor was also explored with the TG/IR technique. The TG/IR results showed that a double stage decomposition process was found in the nitrogen atmosphere. The first stage of degradation reaction was observed to begin around 450℃ and stop around 520℃ with the maximum rate at 492℃. It can be interpreted to the degradation of aliphatic units. The second stage appeared between 520℃ and 900℃, mainly because of the degradation of imide bonds and aromatic units. The IR spectra of evolved gases showed that hydrocarbon was the major evolved gases during the first stage degradation. The major degraded products were CO<,2>, CO and H<,2>O during the second decomposition.
Polyimide TG/IR Thermal degradation Alicyclic
CHEN Chaofeng HUANG Xiang an
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, P. R. China
国际会议
上海
英文
145-147
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）