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  • 1 Textile Research Institute of Gunma 5-46-1 Aioi-cho Kiryu-shi 376-0011 Japan 5-46-1 Aioi-cho Kiryu-shi 376-0011 Japan
  • | 2 Otsuma Women's University 12 Sanban-cho Chiyoda-ku, Tokyo 102-8357 Japan 12 Sanban-cho Chiyoda-ku, Tokyo 102-8357 Japan
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Abstract  

The melting process of constrained nylon 6 fibers has been studied to estimate the true melting point of its original crystals. The melting peak became simpler in shape and shifted to higher temperature with increasing fiber-axis restricting force. When heating rate, β, was increased, the temperature where the melting curve initially departs from its baseline, Tsm, decreased steeply in the range of 45 to 60C min-1, and increased linearly with increasing β above 60C min-1. By linear extrapolation of Tsm to 0C min-1, the temperature of ca 190C was obtained for the melting temperature of the original nylon 6 crystals. This seems to correspond to the zero-entropy-production melting of the most imperfect crystallites of the nylon 6 fabric.

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