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Abstract <p>This research delves into the synergistic influence of dual nanofillers, 0-D tungsten carbide (WC) and 1-D multiwalled carbon nanotubes (MWCNTs) on crystallinity, creep, flammability, thermal degradation, and viscoelastic behaviour of polypropylene (PP). Crystallographic studies revealed that the addition of 1 mass% of 0-D and 2 mass% of 1-D nanofillers into PP matrix exhibited the highest percentage of crystallinity. Raman spectroscopy delineated the hydrogen bond formation between the hydroxyl group of –COOH–MWCNT and pendant group of PP. The hybrid nanocomposite demonstrated highest storage modulus at room temperature and lowest critical creep rate at 30 and 55&#xa0;°C. The hybrid sample also recorded 80.6% decrement in heat release rate, 33.7% increment in limited oxygen index when compared with neat PP. The decoration of ceramic WC on mesh-like MWCNT facilitates the formation of a dense and compact char as evidenced from SEM and Raman analysis.</p> Graphical abstract <p></p>

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Deciphering the combined effect of 0-D and 1-D hybrid nanofillers on the microstructure development, dynamic mechanical properties, and flammability of polypropylene

  • 期刊论文

  • 发表日期：

    2025年9月22日

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  • Snaha Leena,
  • Sai Gopal Krishna Bhagavatula,
  • Rasana Nanoth,
  • Jayanarayanan Karingamanna,
  • Krishna Prasad Rajan,
  • Rajesh Theravalappil

摘要

Abstract

This research delves into the synergistic influence of dual nanofillers, 0-D tungsten carbide (WC) and 1-D multiwalled carbon nanotubes (MWCNTs) on crystallinity, creep, flammability, thermal degradation, and viscoelastic behaviour of polypropylene (PP). Crystallographic studies revealed that the addition of 1 mass% of 0-D and 2 mass% of 1-D nanofillers into PP matrix exhibited the highest percentage of crystallinity. Raman spectroscopy delineated the hydrogen bond formation between the hydroxyl group of –COOH–MWCNT and pendant group of PP. The hybrid nanocomposite demonstrated highest storage modulus at room temperature and lowest critical creep rate at 30 and 55 °C. The hybrid sample also recorded 80.6% decrement in heat release rate, 33.7% increment in limited oxygen index when compared with neat PP. The decoration of ceramic WC on mesh-like MWCNT facilitates the formation of a dense and compact char as evidenced from SEM and Raman analysis.

Graphical abstract