The influence of thermal annealing on microstructure and mechanical properties in high performance liquid crystal copolyesters

Adriana Reyes-Mayer, Amaury Constant, Angel Romo-Uribe, Michael Jaffe

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

    3 Scopus citations

    Abstract

    In this research we have focused on the influence of thermal treatment for periods of time on the thermal and mechanical properties of extruded films of a series of high-performance thermotropic liquid crystal polymers (LCPs). The dependence of microstructure, thermal and mechanical properties on the extent of thermal treatment is investigated. Especially synthesized wholly aromatic LCPs based on hydroxybenzoic acid (B), hydroxynaphthoic acid (N), terephthalic acid (TA) and biphenol (BP) are kindly supplied by Hoechst Celanese Research Corp in the form of 50 μm thick extruded films. Thus, the influence of monomer composition is also studied in order to contrast the influence of molecular conformation. Thermal treatments are carried out at temperatures close to the solid-to-nematic transition (T s→n) for up to several hours under dry air conditions. The results show a profound influence of thermal annealing on morphology and mechanical modulus when annealing is carried out c.a. 40°C below T s→n, where solid-to-nematic transition and Young's modulus are significantly increased.

    Original languageEnglish (US)
    Title of host publicationAdvanced Structural Materials - 2011
    Pages185-189
    Number of pages5
    DOIs
    StatePublished - 2012
    Event20th International Materials Research Congress, IMRC 2011 - Cancun, Mexico
    Duration: Aug 14 2011Aug 19 2011

    Publication series

    NameMaterials Research Society Symposium Proceedings
    Volume1373
    ISSN (Print)0272-9172

    Other

    Other20th International Materials Research Congress, IMRC 2011
    CountryMexico
    CityCancun
    Period8/14/118/19/11

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint Dive into the research topics of 'The influence of thermal annealing on microstructure and mechanical properties in high performance liquid crystal copolyesters'. Together they form a unique fingerprint.

    Cite this