Mechanical properties of PPV film in thermal elimination process

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(PPV_pre) and PPV treated at three node temperatures(125, 155 and 230 °C) 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.

Keywords

Poly(p-phenylene vinylene) / Thermal elimination / Conformation / Crystalline / Mechanical performance

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