Effects of the reaction degree of melamine-formaldehyde resin on the structures and properties of melamine-formaldehyde/polyvinyl alcohol composite fiber

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• 作者：Cihang Yu (1)
  Weixing Xu (1)
  Xiangsen Zhao (1)
  Jianjun Xu (1)
  Mengjin Jiang (1)
  
• 关键词：Retardant fiber ; Composite fiber ; Melamine ; formaldehyde ; Polyvinyl alcohol ; Phase structure
• 刊名：Fibers and Polymers
• 出版年：2014
• 出版时间：September 2014
• 年：2014
• 卷：15
• 期：9
• 页码：1828-1834
• 全文大小：596 KB
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• 作者单位：Cihang Yu (1)
  Weixing Xu (1)
  Xiangsen Zhao (1)
  Jianjun Xu (1)
  Mengjin Jiang (1)
  
  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, 610065, China
  
• ISSN：1875-0052

文摘

Composite fibers made of polyvinyl alcohol (PVA) and melamine-formaldehyde (MF) resins with different reaction degrees were prepared by wet spinning. The phase structures of MF/PVA spinning dopes and composite fibers were observed by using optical microscope (OM) and scanning electron microscope with energy-dispersive X-ray spetroscopy (SEM-EDS). Crystal structures of composite fibers were studied by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The loss of MF resins in the spinning process was calculated by using Kjeldahl. The mechanical properties, the flame retardant property, the water resistant property, and the thermal stability of composite fibers were also tested. Results show that with an increase in the reaction degree of MF resin, the phase separation degrees of spinning dopes and composite fibers rise up, the size of MF microphase grows larger, and the loss of MF resin diminishes; consequently, the hot water resistance and the flame retardancy of the fiber ameliorate while the tensile strength and the thermal stability perform a tendency of dropping after rising.