کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1401876 1501385 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly transparent and hydrophobic fluorinated polyimide films with ortho-kink structure
ترجمه فارسی عنوان
فیلم های پلییمید فلوراید بسیار شفاف و هیدروفوب با ساختار ارتو کینک
کلمات کلیدی
پلییمید های فلوراید، ساختار ارتو کینک، حرارتی فیلم های شفاف، سطح هیدروفوبیکی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی


• New fluorinated polyimide films with ortho-kink structure were prepared.
• All polyimides were easily soluble in convenient organic solvents.
• The polymers displayed high thermal stability.
• Highly transparent thin films were obtained, some of them having a porous structure.
• The polymer film surfaces were highly hydrophobic.

This study focuses on the synthesis and characterization of new polyimide films with ortho-kink structures based on trifluoromethyl-containing diamines and hexafluoroisopropylidene-containing dianhydrides. High-temperature solution polycondensation reactions via conventional two-stage process involving the thermal imidization of the poly(amic acid) precursors resulted in polyimides with high molecular weights. The structures of the monomers and the corresponding polymers were fully confirmed by infrared and nuclear magnetic resonance spectroscopy. All polyimides were easily soluble in convenient organic solvents and showed excellent thermal stability, up to 345 °C. Transparent thin films were obtained therefrom, some of them having a porous structure. The polyimides presented good optical properties with high transparency and low cut-off wavelength. Their aggregation behavior followed by fluorescence spectroscopy was discussed in correlation with the chemical structure. The high hydrophobic character of these fluorinated polyimides was evidenced by the values of water contact angle to the polymer film surfaces. All these properties recommend their use in opto-electronic devices as transparent flexible substrates.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 50, January 2014, Pages 200–213
نویسندگان
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