Micro‐FT‐IR study of stretching a single filament: Polymorphic transition in nylon 6 |
| |
Authors: | Bing Na Ruihua Lv Nana Tian Wenfei Xu Zhujun Li Qiang Fu |
| |
Institution: | 1. Department of Materials Science and Engineering, East China Institute of Technology, Fuzhou 344000, People's Republic of China;2. Department of Polymer Science and Materials, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, People's Republic of China |
| |
Abstract: | The polymorphic transition (γ → α conversion) in a single nylon 6 filament under stretching has been explored for the first time by using micro‐FT‐IR spectroscopy. The content of γ‐form deceases with straining while the amount of α‐form gradually increases, suggesting γ → α conversion. A two‐step mechanism, that is, melting and recrystallization, seems pertinent for the γ → α conversion considering that the γ‐form shows somewhat reversible and the α‐form keeps nearly intact upon unloading. Moreover, stress‐induced γ → α conversion at large strain can be well correlated with the molecular orientation in the amorphous phase and thus a serial arrangement between the γ crystals and amorphous phase along the stretching direction is proposed. © 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 898–902, 2009 |
| |
Keywords: | filament FT‐IR micro‐FT‐IR nylon nylon 6 polymorphic transition polymorphism |
|
|