کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5202607 | 1381905 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of electron beam irradiation on physicochemical properties of poly(trimethylene carbonate)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
Electron beam (EB) irradiation of poly(trimethylene carbonate) (PTMC), an amorphous, biodegradable polymer used in the field of biomaterials, results in predominant cross-linking and finally in the formation of gel fraction, thus enabling modification of physicochemical properties of this material without significant changes in its chemical structure. PTMC films (Mw: 167-553 kg molâ1) were irradiated with different doses using an electron accelerator. Irradiation with a standard sterilization dose of 25 kGy caused neither significant changes in the chemical composition of the polymer nor significant deterioration of its mechanical properties. Changes in viscosity-, number-, weight-, and z-average molecular weights of PTMC for doses lower than the gelation dose (Dg) as well as gel-sol analysis and swelling tests for doses above Dg indicate domination of cross-linking over degradation. EB irradiation can be considered as an effective tool for increasing the average molecular weight of PTMC and sterilization of PTMC-based biomaterials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 96, Issue 8, August 2011, Pages 1430-1437
Journal: Polymer Degradation and Stability - Volume 96, Issue 8, August 2011, Pages 1430-1437
نویسندگان
Joanna Jozwiakowska, Radoslaw A. Wach, Bozena Rokita, Piotr Ulanski, Sameer P. Nalawade, Dirk W. Grijpma, Jan Feijen, Janusz M. Rosiak,