کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5179240 1502509 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystallization assisted microphase separation in all-conjugated phenylene-thiophene diblock copolymers
ترجمه فارسی عنوان
کریستالیزاسیون در جداسازی میکرو فاز در کپلیمرهای تک سلولی فنیلن-تیوفن متصل شده
کلمات کلیدی
کوپلیمر دیافراگم تمام کنجوج، جداسازی میکرو فاز، شکستن کریستال شدن، تعاملات سلولفوبیک،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


- The self-assembly of all-conjugated diblock copolymers were measured.
- The crystallization of copolymers assisted by microphase separation was discussed.
- The solution aggregation promoted the crystallization process.
- Morphological evolution during thermal annealing was investigated in detail.

We demonstrated the crystallization assisted microphase separation of all-conjugated diblock copolymers poly (2,5-dihexyloxy-p-phenylene)-block-(3-hexylthiophene) (PPP-b-P3HT, denoted as BmTn). The crystallization and microphase separation are summarized in terms of the difference of aggregation in solvent and the crystallization temperatures of two blocks, respectively. B39T18 and B41T44 were selected, and crystalline nanowires were formed for B39T18 cast from non-selective solvent via the crystallization of PPP block overwhelming P3HT block. However, both microphase separation and crystallization occurred from selective solvent for PPP block, due to the enhanced aggregation of P3HT block governed by solvophobic interactions. The morphological evolution of B41T44 with equivalent crystallization capacity displayed an opposite result. The lamellar nanostructures formed in films were cast from non-selective solvent and the crystallization breakout microphase separation was formed from selective solvent. Besides, the evolution and phase transition in the thermal annealing process indicated that the PPP crystallized confined from the molten in the P3HT crystalline region, and then the P3HT breakout crystallized primarily and microphase separation with the molten PPP occurred.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 97, 5 August 2016, Pages 238-246
نویسندگان
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