Publication: Post consumer pet depolymerization by acid hydrolysis
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Coadvisor
Graduate program
Undergraduate course
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Publisher
Taylor & Francis Inc
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Article
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Acesso restrito
Abstract
The reaction of post-consumer poly(ethylene terephthalate) with aqueous solutions of sulfuric acid 7.5M was investigated in terms of temperature, time and particle size. The reaction extent reached 80% in four days at 100 degrees C and 90% in 5 hours at 135 degrees C. TPA obtained was purified and considered in the same level of quality of the commercial one after tests of elemental analysis, particle size and color. It was concluded that the hydrolysis occurred preferentially at the chain ends and superficially, having as controller mechanism the acid diffusion into the polymer structure. The shrinking-core model can explain the reaction kinetics.
Description
Keywords
chemical recycling, hydrolysis, PET, sulfuric acid, TPA
Language
English
Citation
Polymer-plastics Technology and Engineering. Philadelphia: Taylor & Francis Inc., v. 46, n. 2, p. 135-144, 2007.
