Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (7): 1449.

• Articles • Previous Articles     Next Articles

Morphology of pPDA/ODA-PMDA Block Copolymer

ZHAI Yan1,2, ZHU Rong-Qi1, GU Yi1*   

  1. 1. State Key Laboratory of Polymeric Materials Engineering, College of Polymer Scicence & Engineering, Sichuan University, Chengdu 610065, China;
    2. Taiyuan Institute of Technology, Taiyuan 030008, China
  • Received:2008-11-26 Online:2009-07-10 Published:2009-07-10
  • Contact: GU Yi. E-mail: guyi@scu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 50433010)资助.

Abstract:

pPDA/ODA-PMDA block copolymers(b-PIs) with different segment length of two components were prepared. Morphology and properties of their films were investigated by polarizingmicroscope(PLM), wide-angle X-ray diffraction(WAXD), transmission electron microscope(TEM) and tensil test. Measured results show all films of b-PI are crystalline. At first, phase separation of rigid segment of pPDA-PMDA takes place, forming nuclei. Then, semi-rigid segment of ODA-PMDA grows around the nuclei and forms small and imperfection grains. The number of nuclei is dependent of the ratio between pPDA and ODA and segment length of pPDA-PMDA(PP), while the size of grains is depended on the movability of ODA-PMDA(PO)segment. Morphology and properties of films can be controlled by changing the ratio of dianmines and segment length of two components.

Key words: pPDA/ODA-PMDA block copolymer; Morphology; Crystalline

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