Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures

Tetsuo Takayama, Mitsugu Todo, Hideto Tsuji, Kazuo Arakawa

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    The blends of poly (lactic acid) (PLA) and poly (ε-caprolactone) (PCL) were prepared by melt blending using lysine triisocyanate (LTI) as a compatibilizer to improve blend miscibility. Critical J-integral at crack initiation, Jin, was measured as a fracture energy parameter, and crystallinity, Xc,PLA, and molecular weight, Mw, were evaluated by DSC and GPC, respectively. Jin and Mw tend to increase, while Xc,PLA decreases, as the LTI content increase. Increased Mw and reduced xc,PLA are both considered to be due to crosslinking reaction of added LTI. It is also found that the decreased size of spherical PCL phase results in the improvement of Jin indicating that the size change of dispersed PCL phase due to LTI addition plays an important role in determining Jin value.

    Original languageEnglish
    Pages (from-to)626-632
    Number of pages7
    Issue number9
    Publication statusPublished - Sept 2006

    All Science Journal Classification (ASJC) codes

    • Chemical Engineering (miscellaneous)
    • Materials Science (miscellaneous)
    • Environmental Science(all)
    • Polymers and Plastics


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