Mesophase structure discovered through in-situ X-ray measurement in drawing process of poly(ethylene 2,6-naphthalene dicarboxylate) fiber

POLYMER

卷:50

Article

Kim, YoungHou²  Aida, Ryo¹  Kang, YoungAh¹  Ohkoshi, Yutaka¹  Gotoh, Yasuo¹  Nagura, Masanobu¹  Urakawa, Hiroshi³ 

[1] Shinshu Univ, Fac Text Sci & Technol, 3-15-1 Tokida, Nagano 3868567, Japan

[2] Shinshu Univ, Collaborat Innovat Ctr Nanotech FIBER NanoFIC, Nagano 3868567, Japan

[3] Kyoto Inst Technol, Grad Sch Sci & Technol, Sakyo Ku, Kyoto 6068585, Japan

关键词: In-situ X-ray diffraction;    Laser drawing;    Necking;   

DOI  :  10.1016/j.polymer.2009.07.020

来源: Elsevier

【 摘 要 】

The structure development in the continuous laser-heated drawing process of poly(ethylene 2,6-naphthalene dicarboxylate) (PEN) fiber was analyzed by in-situ X-ray diffraction measurement. Because of the rapid and uniform laser heating, and the resultant steady-state nature of the necking-drawing, the structure development after the on-set of necking could be measured in the time resolution of several hundred microseconds. We found for the first time the temporal appearance of meridional (001') diffraction at several milliseconds after the on-set of necking indicating that the mesophase structure similar to the one reported for poly(ethylene terephthalate) was also formed in the initial stage of fiber structure development of PEN. The d-spacing of the (001') diffraction 1.230 +/- 0.003 nm was shorter than the c-axis lengths of both alpha and beta crystals. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

Free