Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (4): 698-701.doi: 10.1007/s40242-014-3527-y

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Mechanical Properties of PPV Film in Thermal Elimination Process

LI Qingsong, YANG Qingxiang, ZHANG Haiquan   

  1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P. R. China
  • Online:2014-08-01 Published:2014-05-12
  • Contact: LI Qingsong E-mail:easelee@ysu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.51173155).

Abstract:

This paper deals with the relationships between the structure of poly(p-phenylene vinylene)(PPV) film and treatment temperature and their mechanical properties. The chemical structures and aggregated structures of PPV precursor(PPVpre) and PPV treated at three node temperatures(125, 155 and 230℃) were investigated by FTIR spectrometry and X-ray diffraction. The results show that the content of trans-conformation and the size of the crystalline domains increased with the increase of treatment temperature. The mechanical performances of the corresponding polymers were studied by nanoindentation. The elastic modulus and hardness of PPV films decreased with the increases of the content of trans-conformation and the size of the crystalline domains. These results suggest that the conformation and the size of the crystalline domains are able to induce the elastic modulus and hardness variation of PPV films.

Key words: Poly(p-phenylene vinylene), Thermal elimination, Conformation, Crystalline, Mechanical performance