Improvement of microstructures and properties of biodegradable PLLA and PCL blends compatibilized with a triblock copolymer

V. Vilay, M. Mariatti, Zulkifli Ahmad, K. Pasomsouk, Mitsugu Todo

    Research output: Contribution to journalArticlepeer-review

    44 Citations (Scopus)

    Abstract

    Incompatibility and immiscible binary blends of poly(l-lactide) (PLLA) and poly(e{open}-caprolactone) (PCL) with 70/30wt.% composition were modified and prepared by addition of 0.5, 1 and 2phr of polyethylene oxide-polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) triblock copolymer. The effect of the copolymer ratio on the microstructures and properties of the blends was investigated using proton nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscope (FE-SEM), dynamic mechanical analysis, differential scanning calorimetry, thermo-gravimetric analysis, and Mode I fracture testing. The addition of the copolymer to PLLA/PCL improved its fracture toughness. A reduction in the amount of spherical of PCL upon the addition of copolymers was confirmed by FE-SEM. The glass transition temperature (Tg) and melting temperature (Tm) of PLLA and PCL shifted closer together, indicating that the blend compatibility increased. Thus, PEO-PPO-PEO can be employed as compatibilizer to improve the toughness and compatibility of PLLA/PCL blends.

    Original languageEnglish
    Pages (from-to)6930-6937
    Number of pages8
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Volume527
    Issue number26
    DOIs
    Publication statusPublished - Oct 2010

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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