کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204029 | 1381947 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and functionalization of thermally stable hyperbranched polyamide-ethers based on 6-hydroxy-2,4-bis(4â²-nitrobenzamide)pyrimidine
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis, characterization and functionalization of thermally stable hyperbranched polyamide-ethers based on 6-hydroxy-2,4-bis(4â²-nitrobenzamide)pyrimidine Synthesis, characterization and functionalization of thermally stable hyperbranched polyamide-ethers based on 6-hydroxy-2,4-bis(4â²-nitrobenzamide)pyrimidine](/preview/png/5204029.png)
چکیده انگلیسی
Thermally stable hyperbranched polyamide-ethers (HBPAEs) containing pyrimidine moieties were synthesized using new AB2 type monomer, 6-hydroxy-2,4-bis(4â²-nitrobenzamide)pyrimidine (NAL), which was prepared through amidation and its structural characterization was made by FTIR, 1H, 13C NMR spectrometry and elemental analysis. Polymerization of NAL proceeded homogeneously to yield a gel-free polymer (HBPAE 1). End group derivatization of nitro-terminated HBPAE 1 yielded HBPAE 2 and 3. FTIR confirmed the structure and complete modification of ensuing polymers. DB and inherent viscosity (ηinh) of HBPAE 1 was found to be 0.41 and 0.23 dL/g, respectively. Modified HBPAE 2 and 3 were soluble in various organic solvents including NMP, DMAc and DMSO but amorphous HBPAE 1 was partially soluble in DMF. Glass transition temperature (Tg) of thermally stable HBPAEs was affected by nature of end groups as well as introduction of pyrimidine rings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 95, Issue 4, April 2010, Pages 500-507
Journal: Polymer Degradation and Stability - Volume 95, Issue 4, April 2010, Pages 500-507
نویسندگان
Saima Shabbir, Sonia Zulfiqar, Zahoor Ahmad, Muhammad Ilyas Sarwar,