Extrudate swell behavior 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

10 Citations (Scopus)


The microencapsulated red phosphorus (MRP) filled polypropylene (PP) composites were prepared using a twin-screw extruder. The effects of load and temperature on the extrudate swell behavior of the PP/MRP composite melts were investigated by means of a melt flow indexer. The test temperatures and loads were varied from 180 to 205°C and from 2.16 to 12.5 kg, respectively. The results showed that the die-swell ratio (B) of the composite melts increased roughly linearly with increasing load while decreased slightly with a rise of test temperature. The sensitivity of the die-swell ratio of the composite melts to load was significant. When the test temperature or load was constant, the values of the B of the composite melts decreased slightly with increasing MRP weight fraction. The findings can provide useful information for processing of these composites.
Original languageEnglish
Pages (from-to)3497-3501
Number of pages5
JournalJournal of Applied Polymer Science
Issue number6
Publication statusPublished - 15 Sep 2013


  • composites
  • extrusion
  • rheology

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Surfaces, Coatings and Films
  • Chemistry(all)

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