Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5201972 | Polymer Degradation and Stability | 2014 | 10 Pages |
Abstract
A new and original method to recycle the PET into low molar masses di-alkyl functionalized oligomers is proposed. Ti(OnBu)4 and Ti(OnPr)4 used through alkoxide ligand exchange reactions, with a vertical twin-screw micro-extruder laboratory process, allow in a very short range of time around 10Â min at high temperature to shorten the PET chains length. In homogeneous-like considered conditions fast decreases of molecular chains length and melting temperatures were observed. The structures of these oligomers were identified by 1H NMR, MALDI-ToF and SEC methods, and then correlated with physical properties determined by DSC and TGA analyses. Very useful tools are proposed to control the chemical reaction in order to scale up this process to reactive extrusion at relatively low temperatures.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Mickaël Chabert, Véronique Bounor-Legaré, Nathalie Mignard, Philippe Cassagnau, Cécile Chamignon, Fernande Boisson,