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Synthesis, Crystallization, and Enzymatic Degradation of the Biodegradable Polyester Poly(ethylene azelate)
Author(s) -
Papageorgiou George Z.,
Bikiaris Dimitrios N.,
Achilias Dimitris S.,
Karagiannidis Nikitas
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000491
Subject(s) - crystallization , nucleation , materials science , activation energy , polyester , polymer chemistry , enthalpy of fusion , melting point , ethylene , hydrolysis , polymer , chemical engineering , polarized light microscopy , differential scanning calorimetry , isothermal process , poly ethylene , chemistry , organic chemistry , composite material , thermodynamics , optics , engineering , catalysis , physics
Poly(ethylene azelate) (PEAz) was synthesized and its melting behavior was studied with DSC and Step Scan DSC. The equilibrium melting point of PEAz was found 62 °C and the heat of fusion of 100% crystalline polymer was estimated at 160 J · g −1 . Polarized light microscopy showed mixed birefringence. From isothermal crystallization DSC study, after self‐nucleation, crystallization rates were estimated. The Lauritzen–Hoffman plots showed crystallization regime I to II and II to III transition at 34 and 19 °C respectively. Non‐isothermal crystallization was studied. The activation energy was calculated applying the isoconversional method of Friedman. Chemical hydrolysis of PEAz was very slow, while enzymatic hydrolysis showed comparable rates with PCL.