ICCAS OpenIR
Diffusion-limited kinetics modeling of one-step polyimide formation
Lu, HB; Zhou, J; He, TB
2001-03-14
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume79Issue:11Pages:2052-2059
AbstractA diffusion-limited kinetic model was developed to describe the imidization of one-step polythioetherimide formation based on an endgroup diffusion model. The changes of conversion and viscosity during the imidization were monitored with thermogravimetric analysis and dynamic stress rheometry, respectively. It was observed that the imidization rate began to decelerate after a fast early stage, whereas the viscosity in the system increased dramatically after a period of low value. Amic acid and imide formations concurrently take place in the one-step polyimide formation, but the formation of amic acid is much slower than that of imide and is the rate-limiting step of imidization. When a second-order kinetic model was used to describe the imidization, the effect of viscosity on the diffusion resistance of reactive groups needed to be included. In order to predict the change of viscosity during the imidization, the Lipshitz-Macosko model was modified and introduced into the diffusion-limited kinetic model by the Stokes-Einstein equation. The comparison of the modeled results with experimental data indicated that the diffusion-limited kinetic model and the modified Lipshitz-Macosko model were able to efficiently predict the changes of conversion and viscosity with temperature and time during the one-step polythioetherimide formation. (C) 2001 John Wiley & Sons, Inc.
KeywordDiffusion Kinetics Modeling Polyimide Formation
Indexed BySCI
Language英语
WOS IDWOS:000166649100015
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77740
Collection中国科学院化学研究所
Corresponding AuthorHe, TB
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Mat Engn, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Lu, HB,Zhou, J,He, TB. Diffusion-limited kinetics modeling of one-step polyimide formation[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2001,79(11):2052-2059.
APA Lu, HB,Zhou, J,&He, TB.(2001).Diffusion-limited kinetics modeling of one-step polyimide formation.JOURNAL OF APPLIED POLYMER SCIENCE,79(11),2052-2059.
MLA Lu, HB,et al."Diffusion-limited kinetics modeling of one-step polyimide formation".JOURNAL OF APPLIED POLYMER SCIENCE 79.11(2001):2052-2059.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lu, HB]'s Articles
[Zhou, J]'s Articles
[He, TB]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lu, HB]'s Articles
[Zhou, J]'s Articles
[He, TB]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lu, HB]'s Articles
[Zhou, J]'s Articles
[He, TB]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.