PET
aus Chemipedia, der freien Wissensdatenbank
Polyethylenterephtalat (PET) ist ein Polymer, aus welchem viele Kunststoffflaschen bestehen. Es ist ein so genanntes Copolymerisat, da es aus zwei verschiedenen Monomeren zusammengesetzt ist.
Herstellung
PET wird durch Polykondensation der beiden Monomere Terephtalsäure
und Glykol (Ethandiol)
an deren jeweiligen zwei funktionellen Gruppen (Alkohol- und Carbonsäuregruppe) synthetisiert.
Reaktionsmechanismus
Unter ständiger Wasserabspaltung entsteht langsam das Polymer. Diese Art der Polymerisation dauert länger als andere Polymerisationsverfahren wie beispielsweise die ionische oder die radikalische Polymerisation.
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