Citation: Xiao-jun Wang, Yuan Yuan, Li-li Han, Xia Dong, Jian-ming Zhang. Effect of Solvent Annealing Temperature on Crystal Modifications and Phase Transition Behavior of Regioregular Poly(3-octylthiophene)[J]. Chinese Journal of Polymer Science, ;2014, 32(9): 1158-1166. doi: 10.1007/s10118-014-1493-y shu

Effect of Solvent Annealing Temperature on Crystal Modifications and Phase Transition Behavior of Regioregular Poly(3-octylthiophene)

Corresponding author: Jian-ming Zhang,
Received Date: 13 March 2014
Revised Date: 22 April 2014

Fund Project: This work was financially supported by the Taishan Mountain Scholar Constructive Engineering Foundation (No. TS20081120) and Natural Science Fund for Distinguished Young Scholars of Shandong Province (No. JQ200905).

In present study, the effect of the solvent annealing temperature on the crystal modifications and the phase transition behavior of the subsequently dried poly(3-octylthiophene) (P3OT) film has been investigated by the combination of DSC, WAXD and FTIR techniques. When chloroform is employed as the solvent, it is unexpectedly found that form Ⅰ and form Ⅱ crystal modifications of P3OT could be respectively obtained by room temperature and low temperature annealing. Comparing to the mostly used solvent reported for preparing form Ⅱ, i.e. carbon disulfide (CS2) which is toxic and corrosive, chloroform is less toxic and corrosive and more suitable for solution processing of P3OT. Therefore, this finding provides an alternative way to obtain form Ⅱ. By temperature dependent IR spectroscopy, the structural evolution of P3OT during the form Ⅱ to form Ⅰ phase transition process has also been studied in detail.
- P3OT,
- Crystal modification,
- FTIR
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