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Chinese Journal of High Pressure Physics  > 2010  >  24(1): 6-14 .
Lü Jun, HUANG Rui, LI Liang-Bin. Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends[J]. Chinese Journal of High Pressure Physics, 2010, 24(1): 6-14 . doi: 10.11858/gywlxb.2010.01.002
Citation: Lü Jun, HUANG Rui, LI Liang-Bin. Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends[J]. Chinese Journal of High Pressure Physics, 2010, 24(1): 6-14 . doi: 10.11858/gywlxb.2010.01.002
shu

Morphology Investigation of the Extended-Chain Crystals in High-Pressure Crystallized Poly (Ethylene Terephthalate)-(Bisphenol-A) Polycarbonate Blends

doi: 10.11858/gywlxb.2010.01.002
  • 1.

    Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;

  • 2.

    College of Polymer Materials Science and Engineering, Sichuan University, Chengdu 610065, China;

  • 3.

    National Synchrotron Radiation Lab and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China

  • Received Date: 20 Jan 2009
  • Rev Recd Date: 30 Sep 2009
  • Publish Date: 15 Feb 2010
    Abstract
  • Morphologies of extended- chain crystals with different characteristics, i.e. wedge-shaped crystals, bent crystals and wedge- shaped bent crystals, were disclosed with scanning electron microscopy (SEM) and atomic force microscope (AFM) in the high-pressure crystallized poly (ethylene terephthalate)/bisphenol-A polycarbonate (PET-PC) blends. The observations revealed that the thickening growth for the large polyester extended-chain single crystals should first undergo the nucleation step leading to the folded-chain nuclei, and then, the chain extension process which is an isothermal thickening resulting from transesterification and sliding diffusion. The morphological structures shed light on the fundamental nature of the large single crystals in the blends, which may be instructive to grow such large crystals in similar polymer systems.

     

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