LIQUID RUBBER MODIFICATION OF VINYL ESTER RESINS TO OBTAIN TOUGHENED THERMOSETS FOR PHOTOLITHOGRAPHY

Jaclyn A. McLaughlin, Giuseppe R. Palmese

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

    Abstract

    There exists a large demand for the fabrication of polymeric engineering parts by additive manufacturing. While many available thermoset photolithography resins achieve desirable performance capabilities, these systems commonly exhibit low fracture toughness due to their highly crosslinked structures. This limits the application of additively manufacture thermosets. A well-established method for toughening conventional thermosets is by secondary phase modification via functionally terminated butadiene-acrylonitrile (TBN) elastomers. However, due to poor compatibility with acrylate-based resins and high viscosity, these additives have yet to be implemented within photolithography resins. In this study, a low viscosity, bio-based, liquid rubber (Oct3) is added to photocurable vinyl ester resins and its toughening effect on printed thermosets was observed. The performance of printed thermosets modified with Oct3 is directly compared to thermosets containing vinyl-terminated butadiene acrylonitrile. Processable conditions were maintained when Oct3 was added to the base resin in various amounts (5-15 phr). Fracture toughness (KQ) of modified thermosets was observed to increase from 0.48 ± 0.01 MPa∙m1/2 to 0.83 ± 0.14 MPa∙m1/2 when 15 phr Oct3 was incorporated to the resin.

    Original languageEnglish (US)
    Title of host publicationSAMPE 2022 Conference and Exhibition
    PublisherSoc. for the Advancement of Material and Process Engineering
    ISBN (Electronic)9781934551417
    StatePublished - 2022
    EventSAMPE 2022 Conference and Exhibition - Charlotte, United States
    Duration: May 23 2022May 26 2022

    Publication series

    NameInternational SAMPE Technical Conference
    Volume2022-May

    Conference

    ConferenceSAMPE 2022 Conference and Exhibition
    Country/TerritoryUnited States
    CityCharlotte
    Period5/23/225/26/22

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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