Get access

Thermal, crystalline, and mechanical properties of octa(3-chloropropylsilsesquioxane)/ poly(L-lactic acid) hybrid films

Authors

  • Xiaojing Zhang,

    Corresponding author
    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    • College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author
  • Jiashu Sun,

    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author
  • Shaoming Fang,

    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author
  • Xiniu Han,

    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author
  • Yadong Li,

    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author
  • Chenggui Zhang

    1. College of Materials and Chemical Engineering, Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou 450002, Henan, China
    Search for more papers by this author

Abstract

A series of organic-inorganic hybrid films were prepared based on octa(3-chloropropylsilsesquioxane) (OCPS) and poly(L-lactic acid) (PLLA) via simply solution blending method. The thermal, crystalline and mechanical properties of OCPS/PLLA hybrid films were characterized by Fourier transform infrared, scanning electron microscopy, energy dispersive spectrometer, differential scanning calorimetry (DSC), X-ray diffraction, polarized optical microscopy, thermogravimetric analysis (TGA), and tensile tests. The results showed that OCPS could be dispersed well at molecular level when its content was less than 3 wt % and began to crystallize in PLLA matrix when the content increased to 5 wt %. DSC study revealed that OCPS acted as a plasticizer to decrease both Tg and Tm of the PLLA matrix at various heating rates. The addition of OCPS did not change the crystal form of PLLA, while had an great influence on the cold crystallization and melting behaviors of PLLA in the second heating cycles. Moreover, the initial crystallinity of OCPS/PLLA was higher than that of pure PLLA. The results suggested that OCPS could be an effective heterogeneous nucleating reagent to promote the crystallization of PLLA. TGA showed that the PLLA thermal degradation mechanism remained unchanged, whereas the weight loss temperatures and residual weights were improved. Tensile tests indicated that the incorporation of OCPS into PLLA matrix changed the tensile behavior of the hybrid films from brittle to ductile, and the strain at break was improved remarkably as a result of the plasticizer effect of OCPS. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

Get access to the full text of this article

Ancillary