Isothermal Crystallization Kinetics and Melting Behavior of a Luminescent Conjugated Polymer,Poly(9,9-Dihexylfluorene-Alt-2,5-Didodecyloxybenzene) |
| |
| Authors: | Xiao-Lei Chen Hong-Liang Huang Jian-Gao Shi Yong-Li Liu Lu-Min Wang |
| |
| Institution: | 1. Key Laboratory of East China Sea &2. Oceanic Fishery and Exploitation and Utilization, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences , Shanghai , P.R. China |
| |
| Abstract: | A study of the isothermal crystallization behaviors of poly(9,9-dihexylfluorene-alt-2,5-didodecyloxybenzene) (PF6OC12) was carried out using differential scanning calorimetry (DSC). The crystallization kinetics under isothermal conditions could be described by the Avrami equation. The Avrami exponent n ranges from 3.43 to 3.71 for PF6OC12 at crystallization temperatures between 100.0°C and 90.0°C, indicating a three-dimensional spherical crystal growth with homogeneous nucleation in the primary crystallization stage for the isothermal melt crystallization process. In the DSC scan, after the isothermal crystallization, multiple melting behavior was found. The multiple endotherms could be attributed to melting of recrystallized materials produced originally during different crystallization processes. According to the Arrhenius equation, the activation energy was determined to be 211.29 kJmol?1 for the isothermal melt crystallization of PF6OC12. |
| |
| Keywords: | activation energy conjugated polymer isothermal crystallization luminescent polymer multiple melting |
|
|
