Instrumented falling weight impact of coinjection-molded multipolypropylene sandwich plaques containing β-phase polypropylene core

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19 Citations (Scopus)

Abstract

The instrumented falling weight perforation impact behavior of coinjection-molded multipolypropylene sandwich plaques of various compositions having a β-phase isotactic polypropylene (PP) homopolymer core was studied at room temperature and T = -40°C, respectively. The results were compared with those achieved on injection-molded monomaterial plaques of α- and β-polymorphs. It was found that the coinjection strategy is beneficial only if the skin-forming α-phase PP has a markedly lower molecular weight than the β-nucleated core PP. Sandwich plaques with PP copolymer skins exhibited an outstanding perforation impact resistance. The coinjection strategy for extrusion grade PPs yielded no improvement. Perforation impact at T = -40°C showed a prominent toughness reduction of the multipolypropylene plaques which became comparable with that of the monolayer plaques.

Original languageEnglish
Pages (from-to)881-889
Number of pages9
JournalJournal of Macromolecular Science - Physics
Volume41 B
Issue number4-6
DOIs
Publication statusPublished - Jul 1 2002
EventEuropean Conference on Macromolecular Physics: Morphology and Properties of Crystalline Polymers - Eger, Hungary, Hungary
Duration: Sep 2 2001Sep 5 2001

Keywords

  • Coinjection-molding
  • Instrumented falling weight impact
  • Isotactic polypropylene
  • Skin-core morphology
  • α-phase polypropylene
  • β- phase polypropylene

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

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