تعداد نشریات | 161 |
تعداد شمارهها | 6,468 |
تعداد مقالات | 69,896 |
تعداد مشاهده مقاله | 122,406,911 |
تعداد دریافت فایل اصل مقاله | 95,654,186 |
Scattering Study of Conductive-Dielectric Nano/Micro-Grained Single Crystals Based on Poly(ethylene glycol), Poly(3-hexyl thiophene) and Polyaniline | ||
Journal of Ultrafine Grained and Nanostructured Materials | ||
مقاله 9، دوره 50، شماره 2، اسفند 2017، صفحه 137-151 اصل مقاله (1.66 M) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/jufgnsm.2017.02.09 | ||
نویسندگان | ||
Samira Agbolaghi* 1؛ Sahar Zenoozi2؛ Saleheh Abbaspoor2؛ Maryam Nazari3 | ||
1Chemical Engineering Department, Faculty of Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran | ||
2Institute of Polymeric Materials and Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran. | ||
3Department of Chemistry, University of Calgary, Calgary, Canada | ||
چکیده | ||
Two types of rod-coil block copolymers including poly(3-hexylthiophene)-block-poly(ethylene glycol) (P3HT-b-PEG) and PEG-block-polyaniline (PANI) were synthesized using Grignard metathesis polymerization, Suzuki coupling, and interfacial polymerization. Afterward, two types of single crystals were grown by self-seeding methodology to investigate the coily and rod blocks in grafted brushes and ordered crystalline configurations. The conductive P3HT fibrillar single crystals covered by the dielectric coily PEG oligomers were grown from toluene, xylene, and anisole, and characterized by atomic force microscopy (AFM) and grazing wide angle X-ray scattering (GIWAXS). Longer P3HT backbones resulted in folding, whereas shorter ones had a high tendency towards backbone lamination. The effective factors on folding of long P3HT backbones in the single crystal structures were the solvent quality and crystallization temperature. Better solvents due to decelerating the growth condition led to a higher number of foldings. Via increasing the crystallization temperature, the system decreased the folding number to maintain its stability. Poorer solvents also reflected a higher stacking in hexyl side chain and π-π stacking directions. The dielectric lamellar PEG single crystals sandwiched between the PANI nanorods were grown from amyl acetate, and analyzed using the interface distribution function (IDF) of SAXS and AFM. The molecular weights of PANI and PEG blocks and crystallization temperature were focused while studying the grown single crystals. | ||
کلیدواژهها | ||
P3HT؛ PEG؛ PANI؛ single crystal؛ self-seeding؛ GIWAXS؛ SAXS | ||
مراجع | ||
| ||
آمار تعداد مشاهده مقاله: 983 تعداد دریافت فایل اصل مقاله: 698 |