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Nylon 66 nanofibers prepared by CO 2 laser supersonic drawing
Author(s) -
Suzuki Akihiro,
Mikuni Takumi,
Hasegawa Toshinori
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40015
Subject(s) - supersonic speed , materials science , composite material , nylon 6 , laser , nanofiber , body orifice , fiber , melting point , irradiation , laser power scaling , optics , polymer , thermodynamics , physics , ecology , biology , nuclear physics
ABSTRACT Nylon 66 nanofibers were prepared by irradiating as‐spun nylon 66 fibers with radiation from a carbon dioxide (CO 2 ) laser while drawing them at supersonic velocities. A supersonic jet was generated by blowing air into a vacuum chamber through the fiber injection orifice. The fiber diameter depended on the drawing conditions used, such as laser power, chamber pressure, laser irradiation point, and fiber supply speed. A nanofiber obtained at a laser power of 20 W and a chamber pressure of 20 kPa had an average diameter of 0.337 μm and a draw ratio of 291,664, and the drawing speed in the CO 2 laser supersonic drawing was 486 m s −1 . The nanofibers showed two melting peaks at about 257 and 272°C. The lower melting peak is observed at the same temperature as that of the as‐spun fiber, whereas the higher melting peak is about 15°C higher than the lower one. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014 , 131 , 40015.