کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5191847 | 1381242 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and properties of aliphatic spirodilactam diphenol containing polyesters
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and properties of aliphatic spirodilactam diphenol containing polyesters Synthesis and properties of aliphatic spirodilactam diphenol containing polyesters](/preview/png/5191847.png)
چکیده انگلیسی
A series of aromatic polyesters containing 1,6-diazaspiro[4,4]-nonane-2,7-dione were synthesized under phase-transfer conditions. The copolymers were obtained in essentially quantitative yield, theses were soluble in common organic solvents, and would readily form clear, colorless films from solution. The optimum conditions of polymerization, was obtained via polycondensation at room temperature and reaction time of 4 h in chloroform. All polymers were characterized by FTIR, GPC, viscosity, water contact angle, water absorption, TGA, DSC and TMA. The prepared polyesters showed excellent thermal stability, as measured by TGA (10 wt% loss), are only moderate due to the alicyclic component and range from 365 to 401 °C in air; however, glass transition temperatures are quite high (245-309 °C). The inherent viscosities of these solutions ranged from 0.77 to 1.40 dl gâ1, depending on the polyester structure. The structures of the polyesters were confirmed by FTIR spectroscopy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 46, Issue 12, 26 May 2005, Pages 3971-3974
Journal: Polymer - Volume 46, Issue 12, 26 May 2005, Pages 3971-3974
نویسندگان
Emilio Bucio, John W. Fitch, Sreenu R. Venumbaka, Patrick E. Cassidy,