Melt flow properties and morphology of polypropylene composites filled with microencapsulated red phosphorus

Ji Zhao Liang, Jin Qing Feng, Chi Pong Tsui, Chak Yin Tang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Microencapsulated red phosphorus (MRP)-filled polypropylene (PP) composites were prepared using a twin-screw extruder. The effects of load and temperature as well as the dispersion or distribution of the filler particles in the matrix on the melt volume flow rate (MVR) and melt density (ρm) of the PP/MRP composites were investigated using a melt flow indexer and a scanning electron microscope. The temperatures and loads were varied from 180 to 205°C and from 2.16 to 12.5 kg, respectively. The results showed that the MVR of the composites increased nonlinearly with increase in temperature and load. The sensitivity of MVR of the composite melts to temperature was significant. The MVR of the composites also decreased slightly with an increase in the MRP weight fraction. However, the values of ρm of the composites varied slightly with increase in load, temperature, and MRP weight fraction. The findings can provide useful information for optimum processing of these composites.
Original languageEnglish
Pages (from-to)275-286
Number of pages12
JournalJournal of Thermoplastic Composite Materials
Issue number2
Publication statusPublished - 1 Jan 2015


  • extrusion
  • Polymer-matrix composites
  • resin flow
  • rheological properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Ceramics and Composites

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