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Fractionated Crystallization of Defect-Free Poly(3-hexylthiophene)

Title data

Kohn, Peter ; Hüttner, Sven ; Steiner, Ullrich ; Sommer, Michael:
Fractionated Crystallization of Defect-Free Poly(3-hexylthiophene).
In: ACS Macro Letters. Vol. 1 (September 2012) Issue 10 . - pp. 1170-1175.
ISSN 2161-1653
DOI: https://doi.org/10.1021/mz3003769

Official URL: Volltext

Abstract in another language

Fractionated crystallization (FC), a chain-sorting mechanism by length, is identified in well-defined, low molecular weight, and defect-free regioregular poly(3-hexylthiophene) by X-ray scattering and calorimetry of bulk samples. While wide-angle X-ray scattering (WAXS) qualitatively suggests that the degree of crystallinity is similar in all investigated samples, the melting enthalpies are largely different. We ascribe this to intricacies in the integration of the melting and crystallization peaks in calorimetric experiments, which is caused by FC occurring over a large temperature range. The extent of FC decreases with increasing molecular weight and increases with increasing polydispersity. The temperature-dependent investigation of the long period LP and the (100)-WAXS reflection of a sample in which FC is absent allows to disentangle effects from main-chain and side-chain crystallization.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy > Junior Professorship Solar Energy - Juniorprof. Dr. Sven Hüttner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Junior Professorship Solar Energy
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 12 Jan 2018 10:30
Last Modified: 12 Jan 2018 10:30
URI: https://eref.uni-bayreuth.de/id/eprint/41715