Remy Roddel, Wei Sujun, Campos Luis M, Mackay Michael E
Department of Chemistry, Columbia University, New York New York United States.
ACS Macro Lett. 2015 Sep 15;4(9):1051-1055. doi: 10.1021/acsmacrolett.5b00481. Epub 2015 Sep 2.
Quantitative morphological analysis is essential to the fundamental understanding of semiconducting polymers. Temperature modulated differential scanning calorimetry is used to determine the amount of crystalline and noncrystalline phases within regioregular poly(3-hexylthiophene) (rrP3HT). Careful optimization of the experimental conditions shows that the glass transition of rrP3HT consists of three parts corresponding to the devitrification of the side chains, mobile amorphous fraction (MAF), and rigid amorphous fraction (RAF), consecutively. Measurements taken from this, as well as from the melting transition, allows the first calculation of the degree of crystallinity, MAF and RAF, to be achieved in a single experiment for rrP3HT. This technique thus enables the morphological phases to be determined and potentially related to the performance of electronic devices made from semiconducting polymers.
定量形态分析对于从根本上理解半导体聚合物至关重要。温度调制差示扫描量热法用于确定区域规整聚（3 - 己基噻吩）（rrP3HT）中结晶相和非晶相的含量。对实验条件的仔细优化表明，rrP3HT的玻璃化转变由三个部分组成，依次对应侧链的去玻璃化、可移动非晶部分（MAF）和刚性非晶部分（RAF）。由此以及从熔融转变所进行的测量，使得在单次实验中就能首次计算出rrP3HT的结晶度、MAF和RAF。因此，该技术能够确定形态相，并有可能将其与由半导体聚合物制成的电子器件的性能联系起来。
