Biodegradable polyesters based on star-shaped lactic acid oligomers

Anita Frydrych , Monika Charazińska , Zbigniew Florjańczyk , Marcin Kąkol

Abstract

Catalytic polymerization of ε-caprolactone and copolymerization of maleic anhydride and propylene or ethylene oxide carried out in the presence of star-shaped L-lactic acid oligomers were studied. The analysis of the reaction products by means of GPC, MALDI ToF and 1H NMR show that the applied processes allowed to combine oligomers with polyesters produced by ring opening polymerization and obtain a new type of lactic acid copolymers of relative molar masses in the range 15–60 kg/mol. DSC studies revealed that the formed polyesters segments were fully or partially miscible with poly(lactic acid) core causing the reduction of its glass transition temperature. Selected copolymers were subjected to enzymatic degradation, which indicated that all of these compounds underwent partial decomposition. An analysis of weight loss showed, however, that the degradation occurred more slowly than in the case of poly(lactic acid) of similar molar masses and chain architecture.
Author Anita Frydrych KChTP
Anita Frydrych,,
- Chair Of Polymer Chemistry And Technology
, Monika Charazińska KChTP
Monika Charazińska,,
- Chair Of Polymer Chemistry And Technology
, Zbigniew Florjańczyk KChTP
Zbigniew Florjańczyk,,
- Chair Of Polymer Chemistry And Technology
, Marcin Kąkol KChTP
Marcin Kąkol,,
- Chair Of Polymer Chemistry And Technology
Journal seriesPolymer Degradation and Stability, ISSN 0141-3910
Issue year2016
Vol132
Pages202-212
Publication size in sheets0.5
Keywords in EnglishBiodegradable polymers; Copolymerization; Copolymers; Decomposition; Ethylene; Glass transition; Lactic acid; Oligomers; Polyesters; Polymerization; Stars, Biodegradable polyesters; Catalytic polymerization; Chain architecture; Enzymatic Degradation; Ethylene oxides; L-lactic acid oligomers; Partial decomposition; Poly lactic acid, Ring opening polymerization
DOIDOI:10.1016/j.polymdegradstab.2016.02.021
URL http://www.sciencedirect.com/science/article/pii/S0141391016300441
Languageen angielski
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Score (nominal)35
ScoreMinisterial score = 35.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 3.386 (2) - 2016=3.72 (5)
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