Two-Dimensional Raman Correlation Spectroscopy Study of the Pathway for the Thermal Imidization of Poly(amic acid)

Bulletin of the Korean chemical society

Myong-Hoon Lee¹  John Moon Rhee¹  Yang Hyun Yoo¹  Keunok Han Yu¹  Soo-Chang Yu¹ 

关键词: Thermal imidization;    Poly(amic acid);    Polyimides;    Two-dimensional Raman;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The pathway producing imide ring closure during the thermal imidization of poly(amic acid) (PAA) was investigated in detail using a new analytical method, two-dimensional (2D) Raman correlation spectroscopy. The signs of the cross peaks in synchronous spectra provided evidence of the thermal imidization of PAA into PI as the heating temperature increased. The signs of the cross peaks in asynchronous spectra suggested that the imide-related modes changed prior to the amide or carboxylic mode, which indicates that cyclization occurred before the amide proton was abstracted.

【 授权许可】

Unknown