Novel green polymer composites: Major enhancements in the crystallization kinetics of poly(lactic acid) and mechanical properties of polypropylene created via solid-state shear pulverization

Philip J. Brunner*, John M Torkelson, Neil Kane

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hybrids of poly(lactic acid) (PLA) or polypropylene (PP) with microcrystalline cellulose (MCC) were created using a novel, continuous, and industrially scalable process called solid-state shear pulverization (SSSP), which exposes polymers to high shear and compressive forces near ambient temperature. For the PLA composite, this was followed with melt processing (MP) with added polyethylene glycol (PEG). We demonstrate a synergistic effect of MCC and PEG in enhancing the crystallization kinetics of PLA. For example, we were able to successfully injection mold a highly crystalline (∼35 %) commerical bottle cap in 33 sec, which as far as we know, is the highest level of crystallinity obtained at this cycle time. Neat PLA took over 10 min to reach similar crystallinity levels. Additionally, an SSSP processed 80/20 wt% PP/MCC composite was successfully injection molded into a bottle cap, which showed excellent MCC dispersion and stiffness, while maintaining of the "living hinge" character of PP.

Original languageEnglish (US)
Title of host publicationTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
Pages732-735
Number of pages4
StatePublished - Aug 20 2012
EventNanotechnology 2012: Bio Sensors, Instruments, Medical, Environment and Energy - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 - Santa Clara, CA, United States
Duration: Jun 18 2012Jun 21 2012

Publication series

NameTechnical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012

Other

OtherNanotechnology 2012: Bio Sensors, Instruments, Medical, Environment and Energy - 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012
CountryUnited States
CitySanta Clara, CA
Period6/18/126/21/12

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Keywords

  • Cellulose
  • Physical properties
  • Poly(lactic acid)
  • Polypropylene
  • Solid-state shear pulverization

ASJC Scopus subject areas

  • Ceramics and Composites
  • Surfaces, Coatings and Films

Cite this

Brunner, P. J., Torkelson, J. M., & Kane, N. (2012). Novel green polymer composites: Major enhancements in the crystallization kinetics of poly(lactic acid) and mechanical properties of polypropylene created via solid-state shear pulverization. In Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012 (pp. 732-735). (Technical Proceedings of the 2012 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2012).