Lactide production from polymer waste

Anzhelika Posvyashchennaya, Tatiana Volgina, Viktor Novikov, Alexey Zinovyev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The method of thermal depolymerization of polylactide wastes and products from it has been studied. At a temperature of 200-250 °C and a pressure of 5-10 mbar the maximum yield of crude lactide and pure lactide is 40% and 5.5% by weight accordingly. The addition of catalysts (Zn, ZnO, SnO, C16H30O4Sn, Sb2O3) in an amount from 0.5 to 2.0% by weight makes it possible to intensify the process and increase the monomer yield by 3-10 times. The maximum amount of lactide (∼60 wt%) is achieved by using tin octoate (1.5 wt%) as the catalyst. The findings product is a mixture that consist of D-, L-lactide (∼80 wt%) and m-lactide (∼4 wt%) isomers, lactic acid (∼2 wt%), oligomer of lactic acid (∼14 wt%), water (<1 wt%), and has a melting point 92-96 °C.

Original languageEnglish
Title of host publicationHigh Technology
Subtitle of host publicationResearch and Applications 2017
EditorsGeorgii E. Osokin, Ekaterina A. Kulinich
PublisherTrans Tech Publications Ltd
Pages17-22
Number of pages6
ISBN (Print)9783035712810
DOIs
Publication statusPublished - 1 Jan 2018
Event6th International Conference for Young Scientists High Technology: Research and Applications, HTRA 2017 - Tomsk, Russian Federation
Duration: 27 Nov 201729 Nov 2017

Publication series

NameKey Engineering Materials
Volume769 KEM
ISSN (Print)1013-9826

Conference

Conference6th International Conference for Young Scientists High Technology: Research and Applications, HTRA 2017
CountryRussian Federation
CityTomsk
Period27.11.1729.11.17

Keywords

  • Depolymerization catalysts
  • Lactide production
  • Polylactide
  • Thermal depolymerization

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Lactide production from polymer waste'. Together they form a unique fingerprint.

  • Cite this

    Posvyashchennaya, A., Volgina, T., Novikov, V., & Zinovyev, A. (2018). Lactide production from polymer waste. In G. E. Osokin, & E. A. Kulinich (Eds.), High Technology: Research and Applications 2017 (pp. 17-22). (Key Engineering Materials; Vol. 769 KEM). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.769.17