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ULTRAFINE ELECTROSPUN FIBERS OF POLY-4-HYDROXYBUTYRATE AND COPOLYMERS THEREOF
ULTRAFINE ELECTROSPUN FIBERS OF POLY-4-HYDROXYBUTYRATE AND COPOLYMERS THEREOF
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机译:聚-4-羟基丁酸酯的超细电子纺丝纤维及其共聚物
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摘要
Methods to produce structures containing ultrafine fibers with average diameters from 10 nm to 10 μm and more preferably from 50 nm to 5 μm, have been developed. These methods produce ultrafine fibers without substantial loss of the polymer's weight average molecular weight. The ultrafine electrospun fibers have an unexpectedly higher degree of molecular orientation, and higher melt temperature than fibers derived by dry spinning. In the preferred embodiment, the polymer comprises 4-hydroxybutyrate. The ultrafine fibers are preferably derived by electrospinning. A solution of the polymer is dissolved in a solvent, pumped through a spinneret, subjected to an electric field, and ultrafine fibers with a high degree of molecular orientation are collected. These structures of ultrafine fibers can be used for a variety of purposes including fabrication of medical devices.
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