Utilization of poly(ethylene terephthalate) waste in the synthesis of air-drying polyester alkyd resins and aliphatic-aromatic poly(ester-carbonate)s

Magdalena Mazurek-Budzyńska , Gabriel Rokicki , Konrad Pasnik

Abstract

Two methods of chemical recycling of poly(ethylene terephthalate) (PET) waste with simultaneous recovery of ethylene glycol were described. In the synthesis of the air-drying alkyd polyester resin phthalic anhydride was replaced with phthalic acid. The resin was obtained in one pot process in which PET waste was reacted with incomplete esters of pentaerythritol and glycerol with unsaturated fatty acids. The side product - ethylene glycol was removed from the reaction mixture by azeotropic distillation. To reduce amounts of volatile organic compounds (VOC) in the lacquers the obtained resins were modified with dibutyl sulfosuccinate sodium salt, and aqueous dispersions were prepared. Drying times and hardness of coatings prepared on the basis of alkyd polyester resins were examined. The second method of recycling consisted in PET reaction with 1,4-butanediol afforded oligo(tetramethylene terephthalate) (OTMT). This oligomer was subjected to a transesterification reaction with oligo(tetramethylene carbonate) (OTMC) to form a high molar mass poly(tetramethylene terephthalate-co-tetramethylene carbonate)s (PTMTC). The resulting copolyesters were characterized with NMR and FT-IR spectroscopies, mass spectrometry MALDI-TOF, DSC and mechanical testing. The effect of carbonate unit content on tensile strength and elongation at break, as well as thermal properties was also evaluated.
Author Magdalena Mazurek-Budzyńska KChTP
Magdalena Mazurek-Budzyńska,,
- Chair Of Polymer Chemistry And Technology
, Gabriel Rokicki KChTP
Gabriel Rokicki,,
- Chair Of Polymer Chemistry And Technology
, Konrad Pasnik
Konrad Pasnik,,
-
Journal seriesPolimery, ISSN 0032-2725
Issue year2016
Vol61
No09
Pages600-609
Publication size in sheets0.5
Keywords in Englishpoly(ethylene terephthalate) waste; air-drying polyester alkyd resin; water-thinnable resin; oligo(tetramethylene carbonate); poly(ester-carbonate)
DOIDOI:10.14314/polimery.2016.600
URL http://en.www.ichp.pl/Utilization-of-poly-ethylene-terephthalate-waste
Languageen angielski
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Score (nominal)15
ScoreMinisterial score = 15.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 0.778 (2) - 2016=0.804 (5)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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