Add time:07/22/2019         Source:sciencedirect.com

In this work, the modification of the surface of polypropylene (PP) with poly(3-hexylthiophene) (P3HT) was carried out using a simple two-step grafting reaction. In the first step, 3-(4-ethenylphenyl)thiophene, synthesized by Suzuki-Miyaura cross coupling, was grafted onto the PP surface using tri-n-butylborane (TBB) and oxygen molecules as the radical initiators. In the second step, oxidative polymerization, using FeCl3 as the oxidizing agent, was applied to the graft polymerization of 3-hexylthiophene (3HT) onto PEPT-g-PP. The grafting progress involved crosslinking between 3-(4-ethenylphenyl)thiophene and 3HT. Hexane was used as the solvent for oxidative polymerization because of its low polarity and affinity toward PP. The grafting of 3-(4-ethenylphenyl)thiophene and P3HT onto PP was confirmed by UV–Vis, Raman, X-ray diffraction (XRD) and transmission electron microscopy-energy dispersive X-ray (TEM EDX) spectroscopy analyses. The conductivity of the P3HT-g-PP powder is 0.02 S/cm. On doping the P3HT-g-PP film with I2 the band gap reduced from 2.40 to 2.16 eV.

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