High surface area carbon black (BP-2000) as a reinforcing agent for poly[(−)-lactide]

Paula A. Delgado, Jacob P. Brutman, Kristina Masica, Joseph Molde, Brandon Wood, Marc A. Hillmyer

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The brittle nature and low-heat distortion resistance of a promising biorenewable thermoplastics, poly((−)-lactide) (PLA), motivate the investigation of strengthening additives that can address these deficiencies. In our work, a high surface area carbon black (BP-2000) as well as biobased carbon blacks (hydrochars) were examined as reinforcement agents for PLA. When 1–5 wt % BP-2000 was added to PLA, the crystallization of PLA was accelerated, resulting in higher crystallinity, tensile strength, and heat resistance. A thermal creep experiment revealed that the composites exhibited no significant deformation after 30 min with 2 N of uniaxial tensile force at 80 °C (above the Tg), whereas neat PLA (with similar thermal history) elongated to 79% after 5 min under the same conditions. PLA–hydrochar composites demonstrated similar brittle behavior to neat PLA. Despite the promising nucleating ability of hydrochars, they displayed low interfacial adhesion with PLA because of their low surface area, resulting in poor energy transfer on stretching.

Original languageEnglish (US)
Article number43926
JournalJournal of Applied Polymer Science
Volume133
Issue number45
DOIs
StatePublished - Dec 5 2016

Keywords

  • Blends
  • Crystallization
  • Polyesters
  • Synthesis and processing

How much support was provided by MRSEC?

  • Shared

Reporting period for MRSEC

  • Period 3

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  • Projects

    MRFN

    Lodge, T. P.

    8/1/9810/31/20

    Project: Research project

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