کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5189426 | 1381184 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and properties of side-chain pseudopolyrotaxanes consisting of cucurbituril[6] and poly-N1-(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis, characterization and properties of side-chain pseudopolyrotaxanes consisting of cucurbituril[6] and poly-N1-(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride Synthesis, characterization and properties of side-chain pseudopolyrotaxanes consisting of cucurbituril[6] and poly-N1-(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride](/preview/png/5189426.png)
چکیده انگلیسی
Pseudopolyrotaxanes 3 is synthesized from cucurbituril[6] (CB[6]) and polymer 2 (poly-N1-(4-vinylbenzyl)-1,4-diaminobutane dihydrochloride) in water by simple stirring at room temperature. The monomer 1, polymer 2 and pseudopolyrotaxanes 3 are characterized by 1H NMR, 13C NMR, FT-IR and elemental analysis. In 3, the CB[6] beads are localized on tetramethylene units in side chains of 2, and combine N+ by noncovalent bonds. The degree of threading (number of CB[6] beads per repeat unit) can be controlled from 0 to 1.0 by controlling the amount of CB[6] added. The properties of polymer 2 and pseudopolyrotaxanes 3 are researched by TGA, X-ray powder diffraction (XRD), environment scanning electron microscope (ESEM) and potentiometric titrations. The pseudopolyrotaxanes have higher thermal stability and chain regularity than the parent polymer which are attributed to the bulkiness and the rigidity of the CB[6] threaded. The decomposition temperature and chain regularity of the pseudopolyrotaxanes increase with increasing amount of CB[6] threaded. The effects of salts (NaCl, NaBr or NaI) to pseudopolyrotaxanes are studied by the transmittance with UV-vis, and the results show that NaI is the satisfied precipitant to the pseudopolyrotaxanes. The surface morphologies of pseudopolyrotaxanes 3 observed by ESEM shows a series of spherical particle with different diameter. The results of potentiometric titrations show that the pseudopolyrotaxanes 3 have larger pKav and smaller n than polymer 2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 2, 13 January 2006, Pages 742-750
Journal: Polymer - Volume 47, Issue 2, 13 January 2006, Pages 742-750
نویسندگان
Zhao-Sheng Hou, Ye-Bang Tan, Kimoom Kim, Qi-Feng Zhou,