Thermal degradation of polytetrafluoroethylene in a closed system. Effect of the nature of the surface of the reaction vessel wall | Zendy

Jellinek H. H. G. | Zendy; Kachi H. | Zendy

Premium

Thermal degradation of polytetrafluoroethylene in a closed system. Effect of the nature of the surface of the reaction vessel wall

Author(s) -

Jellinek H. H. G.,

Kachi H.

Publication year - 1965

Publication title -

polymer engineering and science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 111

eISSN - 1548-2634

pISSN - 0032-3888

DOI - 10.1002/pen.760050320

Subject(s) - polytetrafluoroethylene , disproportionation , materials science , fluoride , monomer , kinetics , degradation (telecommunications) , thermal , polymer chemistry , composite material , chemical engineering , catalysis , chemistry , thermodynamics , inorganic chemistry , polymer , organic chemistry , telecommunications , physics , quantum mechanics , computer science , engineering

The thermal degradation of polytetrafluoroethylene has been investigated in a closed system as a function of the nature of the surface of the reaction vessel wall. Reproducible results cannot be obtained in a stainless steel vessel as metal fluoride is continuously formed and a stable fluoride is not formed on the wall. Quartz spoon reaction vessels coated with calcium fluoride give a few reproducible runs, before the coating has to be renewed. If the dimerization of the monomer, which takes place very rapidly around 600°C, is considered, first order rates are obtained up to about 75% monomer formation. The kinetics is briefly discussed on the basis of random initiation followed by depropagation with a relatively short kinetic chain length and disproportionation as termination reaction.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research