Scholarlink

<p>This research deals with understanding the effect of molybdenum carbide (Mo<sub>2</sub>C) addition on thermo-mechanical and wettability behaviour of ultra-high molecular weight polyethylene (UHMWPE) under accelerated weathering condition. Compression moulding technique is used to develop the UHMWPE composites with varying concentration of Mo<sub>2</sub>C (3, 6, 9 wt%). ASTM G155-13 standard is adopted to carry out the accelerated weathering studies. Developed composites are tested for various functional properties that includes dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), thermal conductivity, thermomechanical analysis (TMA) and wettability before and after weathering. Formation of carbonyl peak and reduction in C-H stretching are observed in FTIR confirms the oxidative degradation of matrix during weathering. DMA studies reveals that the addition of Mo<sub>2</sub>C improves the visco-elastic behaviour of UHMWPE. After weathering, 9 wt% Mo₂C composites retained ~ 14% higher modulus stability compared to weathered neat UHMWPE, indicating improved viscoelastic retention. Addition of filler decreases the thermal conductivity of UHMWPE; whereas, increase in thermal conductivity was observed after weathering. TGA results depicts that thermal stability increases with addition of Mo<sub>2</sub>C and thermal stability of UHMWPE decrease to 21.98% after weathering. Wettability analysis reveals that incorporation of Mo<sub>2</sub>C suppress the oxidative degradation that help to retain the hydrophobicity of UHMWPE. Developed composite shows potential for outdoor structural application where resistance to weather induced degradation is essential.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Thermo-mechanical stability and wettability of Mo₂C/UHMWPE composites under accelerated weathering

  • 期刊论文

  • 发表日期：

    2026年4月13日

查看全文
  • Kavimani Vijayananth,
  • Sathish Kumar Palaniappan,
  • Manoj Kumar Singh,
  • Gopal Pudhupalayam Muthukutti,
  • Sanjay Mavinkere Rangappa,
  • Suchart Siengchin

摘要

This research deals with understanding the effect of molybdenum carbide (Mo2C) addition on thermo-mechanical and wettability behaviour of ultra-high molecular weight polyethylene (UHMWPE) under accelerated weathering condition. Compression moulding technique is used to develop the UHMWPE composites with varying concentration of Mo2C (3, 6, 9 wt%). ASTM G155-13 standard is adopted to carry out the accelerated weathering studies. Developed composites are tested for various functional properties that includes dynamic mechanical analysis (DMA), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), thermal conductivity, thermomechanical analysis (TMA) and wettability before and after weathering. Formation of carbonyl peak and reduction in C-H stretching are observed in FTIR confirms the oxidative degradation of matrix during weathering. DMA studies reveals that the addition of Mo2C improves the visco-elastic behaviour of UHMWPE. After weathering, 9 wt% Mo₂C composites retained ~ 14% higher modulus stability compared to weathered neat UHMWPE, indicating improved viscoelastic retention. Addition of filler decreases the thermal conductivity of UHMWPE; whereas, increase in thermal conductivity was observed after weathering. TGA results depicts that thermal stability increases with addition of Mo2C and thermal stability of UHMWPE decrease to 21.98% after weathering. Wettability analysis reveals that incorporation of Mo2C suppress the oxidative degradation that help to retain the hydrophobicity of UHMWPE. Developed composite shows potential for outdoor structural application where resistance to weather induced degradation is essential.

Graphical Abstract