Kuwait-University-Journal-of-Law-header
Search
Kuwait Journal of Science

Previous Issues

Advance Search
Year : From To Vol
Issue Discipline:
Author

Volume :36 Issue : 2 2009      Add To Cart                                                                    Download

Blends of poly(ethylene Terephthalate) and poly (methyl methacrylate): II. Non-isothermal degradation kinetics

Auther : ADAM AL-MULLA*, SAMI H. ALI AND MISHAL AL-HASSAN

*Chemical Engineering Department, Kuwait University, P.O. Box 5969, 13060 Safat, Kuwait Email: adamalmulla@kuc01.kuniv.edu.kw

 

ABSTRACT

 

The kinetics of the thermal degradation of poly(ethylene terephthalate) (PET), poly(methyl methacrylate) (PMMA) and four different blends of PET and PMMA (PET90/PMMA10, PET75/PMMA25, PET50/PMMA50 and PET25/PMMA75 weight/weight percent), developed using a batch mixing process, were investigated by Thermogravimetric Analysis (TGA). Kissinger, Friedman, Park-Oh-Lee-Kim-Yo, Vyazovkin and Ozawa models have been used to characterize the degradation kinetics of the polymers under study at the heating rates 5, 10, 15 and 200 C/min under nitrogen atmosphere. The kinetic parameters evaluated were the activation energy(Ea) Arrhenius pre-exponential factor (A) and degradation reaction order (n). The fitting of each model to the experimental data was evaluated using the correlation coefficient (r). The results indicated that Park-co. and Kissinger models gave similar values of Ea and Ln (A), while those obtained using Vyazovkin and Ozawa were almost identical. PET/PMMA blends in general exhibited higher activation energies, and thus better thermal stabilities, than PMMA.

Kuwait Journal of Science
Journal of Law

You are Visitor No.

55663

Journal of Law
Journal of Law
Tell your friendsJournal of Law
Journal of Law

Last Updated

Jun 19, 2012

Journal of Law
Journal of Law
Journal of Law

Please enter your email Here to receive our news

Journal of Law