Impact of crystallization on performance properties and biodegradability of poly(lactic acid)

Shawn Shi, Ramani Narayan, Shilpa Manjure

    Research output: ResearchConference contribution

    Abstract

    Polylactic Acid (PLA) is the most widely available, renewable and compostable polymer with several unique features. However, PLA is poor in its ability to withstand elevated use temperatures above 55 °C. As such it is common practice to either compound PLA with additives [1-2] that improve its heat deflection temperature or increase its crystallinity [3] in mold or in an extra annealing step for use in injection molded applications. The objective of this research was to study the crystallization of three PLA grades and its effect on thermal properties including compostability. Crystallization was studied using DSC and Talc was used as a nucleating agent. Crystallinity was found to vary from 25% to 60% for the various grades. The PLA was converted into test bars and cutlery and its heat distortion temperature was tested before and after annealing. Additionally, the crystallized cutlery was sent to a local composting facility and was found to disintegrate within 4 weeks, which is much sooner than the requirements of the ASTM D6400 standard of 12 weeks.

    LanguageEnglish (US)
    Title of host publicationAnnual Technical Conference - ANTEC, Conference Proceedings
    PublisherSociety of Plastics Engineers
    Pages2604-2608
    Number of pages5
    Volume3
    ISBN (Print)9781632665300
    StatePublished - 2013
    Event71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013 - Cincinnati, OH, United States
    Duration: Apr 22 2013Apr 24 2013

    Other

    Other71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013
    CountryUnited States
    CityCincinnati, OH
    Period4/22/134/24/13

    Profile

    Biodegradability
    Lactic acid
    Crystallization
    Acids
    poly(lactic acid)
    Temperature
    Annealing
    Hot Temperature
    Talc
    Composting
    Thermodynamic properties
    Polymers

    Keywords

    • Biodegradable
    • Compostable
    • Crystallization
    • Injection molding
    • PLA
    • Poly(lactic) acid

    ASJC Scopus subject areas

    • Polymers and Plastics
    • Chemical Engineering(all)

    Cite this

    Shi, S., Narayan, R., & Manjure, S. (2013). Impact of crystallization on performance properties and biodegradability of poly(lactic acid). In Annual Technical Conference - ANTEC, Conference Proceedings (Vol. 3, pp. 2604-2608). Society of Plastics Engineers.

    Impact of crystallization on performance properties and biodegradability of poly(lactic acid). / Shi, Shawn; Narayan, Ramani; Manjure, Shilpa.

    Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 3 Society of Plastics Engineers, 2013. p. 2604-2608.

    Research output: ResearchConference contribution

    Shi, S, Narayan, R & Manjure, S 2013, Impact of crystallization on performance properties and biodegradability of poly(lactic acid). in Annual Technical Conference - ANTEC, Conference Proceedings. vol. 3, Society of Plastics Engineers, pp. 2604-2608, 71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013, Cincinnati, OH, United States, 4/22/13.
    Shi S, Narayan R, Manjure S. Impact of crystallization on performance properties and biodegradability of poly(lactic acid). In Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 3. Society of Plastics Engineers. 2013. p. 2604-2608.
    Shi, Shawn ; Narayan, Ramani ; Manjure, Shilpa. / Impact of crystallization on performance properties and biodegradability of poly(lactic acid). Annual Technical Conference - ANTEC, Conference Proceedings. Vol. 3 Society of Plastics Engineers, 2013. pp. 2604-2608
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