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Chinese Journal of High Pressure Physics  > 2006  >  20(4): 439-444 .
Lü Jun, HE Yang, LI Liang-Bin, HUANG Rui. SEM Observation of Large Polymer Extended-Chain Crystals in High-Pressure Crystallized PET/PC Blends[J]. Chinese Journal of High Pressure Physics, 2006, 20(4): 439-444 . doi: 10.11858/gywlxb.2006.04.017
Citation: Lü Jun, HE Yang, LI Liang-Bin, HUANG Rui. SEM Observation of Large Polymer Extended-Chain Crystals in High-Pressure Crystallized PET/PC Blends[J]. Chinese Journal of High Pressure Physics, 2006, 20(4): 439-444 . doi: 10.11858/gywlxb.2006.04.017
shu

SEM Observation of Large Polymer Extended-Chain Crystals in High-Pressure Crystallized PET/PC Blends

doi: 10.11858/gywlxb.2006.04.017
  • 1.

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

  • 2.

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

More Information
  • Corresponding author: HUANG Rui
  • Received Date: 06 Nov 2005
  • Rev Recd Date: 09 Sep 2006
  • Publish Date: 05 Dec 2006
    Abstract
  • Large polymer extended-chain crystals have an important role that cannot be replaced in the study on low dimensional systems of physics. However, the small size of polymer extended-chain crystals that formerly had to be obtained through a long time confined their effect. Adding 10% (mass fraction) PC to PET, we obtained plenty of polymer extended-chain single crystals with C axis thickness exceeding 100 m during the study on the high-pressure crystallization behaviors of PET/PC blends with a self-made piston-cylinder apparatus. For the first time, scanning electron microscope was employed to analyze them in a deep-going way. Large extended-chain crystals with various morphologies were observed by SEM, i. e. perfect extended-chain crystals, extended-chain crystals fractured along or perpendicular to C axis, extended-chain crystals with cohesive fracture surfaces, different wedge-shaped extended-chain crystals on different fracture surfaces and bending extended-chain crystals. Some mechanisms were also put forward for the formation of the observed large crystals.

     

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