Publication detail

Synthesis of novel bio source polymerizable coating precursors based on depolymerized poly lactic acid (PLA)

JAŠEK, V. FIGALLA, S.

Original Title

Synthesis of novel bio source polymerizable coating precursors based on depolymerized poly lactic acid (PLA)

Type

abstract

Language

English

Original Abstract

This work is focused on the synthesis of low viscosity bio source polymerizable precursors for various coating applications. At first, methyl and ethyl esters of lactic acid are prepared via alcoholysis of PLA in high temperature and pressure conditions without any solvent. The conditions for depolymeration were: temperature of 151 °C and the vapor pressure of 8,2 bar for ethyl lactate and 12,5 bar for methyl lactate. The conversions were analyzed via LC-MS and measured values were above 98 % for both esters after 2 hours. Second step of the synthesis was the methacrylation of the hydroxyl functional groups of the esters. Methacrylic anhydride (MAA) was used as a nucleophile and an innovative catalyst – potassium 2-ethylhexanoate – was chosen for the reactions. The conversions of polymerizable products reached values between 85-91 % after 5 hours of the reaction analyzed by GC-FID. All product structures were determined via methods: MS-spectrum, 1(H) NMR and FTIR.

Keywords

PLA; depolymeration, alcoholysis

Authors

JAŠEK, V.; FIGALLA, S.

Released

3. 10. 2022

Publisher

Institut makromolekulární chemie AV

Location

Praha

ISBN

978-80-85009-96-5

Book

Book of abstracts

Pages from

47

Pages to

47

Pages count

67

BibTex

@misc{BUT180773,
  author="Vojtěch {Jašek} and Silvestr {Figalla}",
  title="Synthesis of novel bio source polymerizable coating precursors based on depolymerized poly lactic acid (PLA)",
  booktitle="Book of abstracts",
  year="2022",
  pages="47--47",
  publisher="Institut makromolekulární chemie AV",
  address="Praha",
  isbn="978-80-85009-96-5",
  note="abstract"
}