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Dokument Nr.	200300428 (klicken Sie bitte auf die Dokumentnummer um dieses Dokument anzuzeigen)
Titel	2-oxepane-1,5-dione: a precursor of a novel class of versatile semicrystalline biodegradable (co)polyesters
Abstract	The steadily increasing concern of the general public with the protection of our daily environment has largely contributed to the advent and growth of biodegradable polymers. Among them, poly(epsilon -caprolactone), PCL, has a central position because of highly desired combination of biocompatibility and good mechanical properties. Nevertheless, the melting temperature (T(m)) of PCL is too low for it to be usable as packaging material. With the purpose to modify PCL properties, a series of (alpha and gamma)-substituted lactones have been synthesized. This communication aims at reporting on the synthesis and polymerization of 2-oxepane-1,5-dione (OPD), which has the same structure as epsilon -caprolactone, except for the central methylene group which is replaced by a carbonyl. This new monomer paves the way to a novel class of (co)polyesters with potential applications as packaging material and constitutive component of biomedical devices. (orig.)
Control terms engl.	ALKOXYTIN; YIELD; BIODEGRADATION; CAPROLACTONE; COPOLYMERS; COPOLYMERIZATION; ELECTRON MICROSCOPY; GLASS TRANSITION TEMPERATURE; HETEROCYCLICS; CATALYSTS; KETONES; CRYSTALLINITY; LACTONES; MEDICINE; MONOMERS; POLYETHERESTERS; BULK POLYMERIZATION; RING-OPENING POLYMERIZATION; MELTING POINT; PACKAGING; HEAT, SPECIFIC; TENSILE STRENGTH
Control terms german	ALKOXYZINN; AUSBEUTE; BIOLOGISCHER ABBAU; CAPROLACTON; COPOLYMERE; COPOLYMERISATION; ELEKTRONENMIKROSKOPIE; GLASTEMPERATUR; HETEROCYCLEN; KATALYSATOREN; KETONE; KRISTALLINITAET; LACTONE; MEDIZIN; MONOMERE; POLYETHERESTER; POLYMERISATION IN MASSE; POLYMERISATION UNTER RINGOEFFNUNG; SCHMELZPUNKT; VERPACKUNGSWESEN; WAERME, SPEZIFISCHE; ZUGFESTIGKEIT