Thermal imidization process of polyimide film: Interplay between solvent evaporation and imidization

	Thermal imidization process of polyimide film: Interplay between solvent evaporation and imidization
	Chen, Wenjuan 1,3; Chen, Wei 2,3; Zhang, Baoqing 1,3; Yang, Shiyong 2,3; Liu, Chen-Yang 1,3
刊名	POLYMER
	2017-01-27
卷号	109 页码:205-215
关键词	Polyimide Imidization Characterizations
英文摘要	The thermal imidization process of 1,2,4,5-benzenetetracaboxylic (PMDA)/4,4'-diamnodiphenyl ether (4,4'-ODA) solutions in N-methyl-2-pyrrolidone (NMP) from polyimide (PI) precursor, poly (amic acid) (PAA), was systematically investigated through a series of characterization methods, such as Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). At the low-temperature drying stage, mechanical properties and T-g of polymer films were increased as a result of solvent removal. TGA method was used to quantitatively monitor the evaporations of hydrogen-bonded solvents on PAA and of the dehydration during the imidization reaction that occurred above 150 degrees C. During the imidization stage, the interplay between the solvent evaporation and the imidization was the key factor that determined the enhancement of the mechanical properties and T-g. The degree of imidization approached 94% when the temperature was increased to 250 degrees C. A "complete" imidization was achieved by annealing between 350 and 400 degrees C. The enhancement in the mechanical properties of final PI films may result from the increased T-g and the crystallized structure formed during the annealing stage. (C) 2016 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38073]
专题	化学研究所_分子识别与功能实验室
作者单位	1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Chem & Mat, Beijing Natl Lab Mol Sci,CAS Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Lab Adv Polymer Mat, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Wenjuan,Chen, Wei,Zhang, Baoqing,et al. Thermal imidization process of polyimide film: Interplay between solvent evaporation and imidization[J]. POLYMER,2017,109:205-215.
APA	Chen, Wenjuan,Chen, Wei,Zhang, Baoqing,Yang, Shiyong,&Liu, Chen-Yang.(2017).Thermal imidization process of polyimide film: Interplay between solvent evaporation and imidization.POLYMER,109,205-215.
MLA	Chen, Wenjuan,et al."Thermal imidization process of polyimide film: Interplay between solvent evaporation and imidization".POLYMER 109(2017):205-215.