Processing-structure-property relationships in solid-state shear pulverization: Parametric study of specific energy

Philip J. Brunner, Joshua T. Clark, John M. Torkelson, Katsuyuki Wakabayashi*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Solid-state shear pulverization (SSSP) is a unique processing technique for mechanochemical modification of polymers, compatibilization of polymer blends, and exfoliation and dispersion of fillers in polymer nanocomposites. A systematic parametric study of the SSSP technique is conducted to elucidate the detailed mechanism of the process and establish the basis for a range of current and future operation scenarios. Using neat, single component polypropylene (PP) as the model material, we varied machine type, screw design, and feed rate to achieve a range of shear and compression applied to the material, which can be quantified through specific energy input (E p). As a universal processing variable, E p reflects the level of chain scission occurring in the material, which correlates well to the extent of the physical property changes of the processed PP. Additionally, we compared the operating cost estimates of SSSP and conventional twin screw extrusion to determine the practical viability of SSSP.

Original languageEnglish (US)
Pages (from-to)1555-1564
Number of pages10
JournalPolymer Engineering and Science
Issue number7
StatePublished - Jul 2012

ASJC Scopus subject areas

  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry


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