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Characterization and properties of the neutral and doped blends of poly(3‐dodecylthiophene) with low‐density polyethylene
Author(s) -
Qiao Xiuying,
Wang Xianhong,
Zhao Xiaojiang,
Wang Yanju,
Chen Qingyong,
Mo Zhishen
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10247
Subject(s) - low density polyethylene , differential scanning calorimetry , materials science , conductivity , scanning electron microscope , polyethylene , doping , fourier transform infrared spectroscopy , polymer blend , nucleation , thermal stability , dispersion (optics) , chemical engineering , analytical chemistry (journal) , polymer chemistry , composite material , polymer , chemistry , copolymer , organic chemistry , optics , thermodynamics , physics , optoelectronics , engineering
In this paper, the structures and properties of the neutral and doped blends of poly(3‐dodecylthiophene) (P3DDT) with low‐density polyethylene (LDPE) were investigated. Wide‐angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC), Fourier transform infrared spectra (FTIR), and scanning electron microscopy (SEM) were used to characterize the structures and morphologies of the blends, and conductivity was also measured. It was found that separate crystallizations occur between P3DDT and LDPE. When the amount of P3DDT is small in the blend, it has the effect of a nucleation reagent and has some influence on the crystal structure. After doping, the interaction force between the molecular chains increases, and leads to a more compact packing and a more uniform dispersion in morphology. Through blending, the thermal stability of pure component could be greatly improved, especially when the P3DDT content is 5 wt %. The conductivity measurements indicate that the conductivity increases with the increase of the P3DDT composition and doping time. © 2002 John Wiley & Sons, Inc. J Appl Polym Sci 84: 741–749, 2002; DOI 10.1002/app.10247