کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5191932 | 1381243 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Polymer whiskers based on p-mercaptobenzoyl and p-oxybenzoyl blocks
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Polymer whiskers based on p-mercaptobenzoyl and p-oxybenzoyl blocks Polymer whiskers based on p-mercaptobenzoyl and p-oxybenzoyl blocks](/preview/png/5191932.png)
چکیده انگلیسی
Preparation of polymer whisker based on p-mercaptobenzoyl (S) and p-oxybenzoyl (O) blocks was examined by the polymerization of S-acetyl-4-mercaptobenzoic acid (AMBA) and the following addition of 4-acetoxybenzoic acid (ABA). Polymerization of AMBA was carried out in liquid paraffin at 300 °C for 3 h yielding poly(p-mercaptobenzoyl) (PMB) whisker, and then ABA was added stepwise at 3-hour intervals into the solution. Initial polymerization concentration was 1.98%. The length of the whisker increased with the addition and it became 26.7 μm from 20.1 μm after third ABA addition. The width increased very slightly. Both length and width increased with polymer yield but the length increased preferentially rather than the width. The number of whiskers was constant even after the addition of ABA and poly(p-oxybenzoyl) (POB) whisker was not newly formed by the addition. Microscopic FT-IR and selected area electron diffraction measurements revealed that polymer molecules were aligned along the long axis of the whiskers, and the center and tip parts were comprised of PMB crystal and POB crystal, respectively. The polymer whisker based on S and O blocks was successfully prepared as grafting POB crystal on PMB whisker with stepwise addition of ABA. Thermal property of the resulting whiskers was also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 7, 10 March 2005, Pages 2191-2200
Journal: Polymer - Volume 46, Issue 7, 10 March 2005, Pages 2191-2200
نویسندگان
Kazufumi Kobashi, Kunio Kimura, Tetsuya Uchida, Yuhiko Yamashita, Kaoru Shimamura,