A study of the thermal cure of a phenylethynyl-terminated imide model compound and a phenylethynyl-terminated imide oligomer (PETI-5)

Journal of Polymer Science Part A: Polymer ChemistryVolume 36, Issue 3 p. 461-470 Article A study of the thermal cure of a phenylethynyl-terminated imide model compound and a phenylethynyl-terminated imide oligomer (PETI-5) Xiaomei Fang, Xiaomei Fang Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorDiana F. Rogers, Diana F. Rogers Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorDaniel A. Scola, Corresponding Author Daniel A. Scola Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorM. P. Stevens, M. P. Stevens University of Hartford, West Hartford, Connecticut 06117Search for more papers by this author Xiaomei Fang, Xiaomei Fang Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorDiana F. Rogers, Diana F. Rogers Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorDaniel A. Scola, Corresponding Author Daniel A. Scola Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Polymer Science Program, Institute of Materials Science, University of Connecticut, 97 North Eagleville Road, Storrs, Connecticut 06269–3136Search for more papers by this authorM. P. Stevens, M. P. Stevens University of Hartford, West Hartford, Connecticut 06117Search for more papers by this author First published: 16 April 2003 https://doi.org/10.1002/(SICI)1099-0518(199802)36:3<461::AID-POLA10>3.0.CO;2-LCitations: 76AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract The kinetic mechanism of the thermal cure of a phenylethynyl-terminated imide model compound, 3,4′-bis[(4-phenylethynyl)phthalimido]diphenyl ether (PEPA-3,4′-ODA) and a phenylethynyl-terminated imide oligomer PETI-5 (MW 5000 g/mol) was studied. FTIR was used to follow the cure of the model compound, while thermal analyses (DSC) was used to follow the cure of the PETI-5 oligomer. The changes in IR absorbance of phenylethynyl triple bonds at 2214 cm−1 of PEPA-3,4′-ODA as a function of cure time were detected at 318, 336, 355, and 373°C, respectively. The changes in the glass transition temperature, Tg, of PETI-5 as a function of time were measured at 350, 360, 370, 380, and 390°C, respectively. The DiBenedetto equation was applied to define the relative extent of cure, x, of the PETI-5 oligomer by Tg. For the model compound, the reaction followed first order kinetics, yielding an activation energy of 40.7 kcal/mol as determined by infrared spectroscopy. For PETI-5, the reaction followed 1.5th order, yielding an activation energy of 33.8 kcal/mol for the whole cure reaction, as determined by Tg using the DiBenedetto method. However, the cure process of PETI-5 just below 90% by this method followed first-order kinetics yielding an activation energy of 37.2 kcal/mol. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 461–470, 1998 Citing Literature Volume36, Issue3February 1998Pages 461-470 RelatedInformation