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Effect of Winding Speed on the Structure and Mechanical Properties of High-Strength Polyamide 6 Fibers

  • Gongxun Zhai
  • Hengxue XiangEmail author
  • Mingda Ni
  • Weinan Pan
  • Zexu Hu
  • Meifang ZhuEmail author
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 216)

Abstract

In order to illustrate the effect of melt-spinning winding speed on the high-strength polyamide 6 fibers, the structural evolution and mechanical properties of PA6 fibers were investigated by differential scanning calorimetry (DSC), two-dimensional wide-angle X-ray diffraction (2D-WAXD), and yarn strength tester. With the increase of winding speed, the breaking strength and initial modulus of PA6 fibers increased and the elongation at breaking decreased. The fibers breaking strength reached 10.09 cN/dtex. This was due to the increase of orientation degree of PA6 fibers caused by the increasing rapid winding speed. On the other hand, the results from DSC curves of PA6 fibers indicated that the melting point of PA6 fibers maintained almost unchanged, while both the enthalpy values and the crystallinity of PA6 fibers were decreased with the increase of winding speed. Moreover, the 2D-WAXD results showed that the diffraction intensity at (200) plane and (002 + 202) plane increased with the increase of winding speed, indicating that the crystal structure transformed from γ crystal to α crystal.

Notes

Acknowledgements

The authors gratefully acknowledge the support from the Fundamental Research Funds for the Central Universities (2232018A3-01, 2232018D3-03), the National Natural Science Foundation of China (51733002, 51603033), the Science and Technology Commission of Shanghai Municipality (16JC1400700), the Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-03-E00055). The authors also thank Guangdong Xinhui Meida Nylon Co., Ltd (Guangdong, China) for kindly providing the help in this study.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and Engineering, Donghua UniversityShanghaiChina

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