Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   May-June 2003 , Volume 12 , Number 3; Page(s) 165 To 170.
 
Paper: 

SOME ASPECTS OF THE THERMO-KINETIC NON-ISOTHERMAL STUDY ON THE THERMOOXIDATIVE DEGRADATION OF PLOLYTETRAFLUOROETHYLENE CONTAINING ADDITIVES

 
 
Author(s):  CHIRIAC M., ROSU A., DUMITRAS M., ODOCHIAN L.*
 
* Al. I. Cuza University, Faculty of Chemistry, Iassy-6600, Romania
 
Abstract: 

The thermooxidative degradation of polytetrafluoroethylene(PTFE), both pure and ‎containing additives such as: carbon(graphite) (C), bronze (BZ) and glass fibre (GF), ‎has been studied by non-isothermal thermo-differential analysis (DTA). The values of ‎kinetic parameters obtained from the DTA data, on the basis of thermo-kinetic ‎equations, were compared with the values obtained from the non-isothermal thermo-‎gravimetric analysis(TG-DTG) and a good agreement was achieved. The analysis of ‎the characteristic temperatures and of the kinetic parameters from DTA-DTG data ‎revealed that the thermal stability and mechanism of thermooxidative degradation ‎depend on the nature and concentration of additives. The results were confirmed by ‎the existence of a real compensation effect. The following equation was derived for ‎the compensation effect: In A=0.1410 E- 0.15‎‏.‏

 
Keyword(s): THERMAL-KINETICS, NON-ISOTHERMAL, THERMOOXIDATIVE DEGRADATION, PTFE, ADDITIVES
 
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