Two novel methods for synthesizing poly (propylenefumarate): Technical aspects and role of vacuum and N2purging effects
محل انتشار: فصلنامه پلی اولفین ها، دوره: 4، شماره: 1
سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 398
فایل این مقاله در 15 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_POJ-4-1_002
تاریخ نمایه سازی: 29 آذر 1396
چکیده مقاله:
Poly (propylene fumarate) (PPF), a linear unsaturated polyester consisting of alternating propylene glycol and fumaricacid units, can be cured in vivo to fll the skeletal defects with minimal surgical intervention. Many different methodshave been reported for synthesizing PPF, but none of them gives a clear method. The present paper introduces two newmethods in PPF synthesis: Modifed reflux system (MRS) and mixed reflux-distillation system (MRDS). Similarly,the effects of applying vacuum (vacuum sequence, time, vacuum applying position, and the distance between vacuumapplying position and reactor) as well as nitrogen gas (used continuously or only as an N2 blanket) on the PPF synthesishave been studied. The PPF obtained using optimum reaction condition has been characterized by using NMR, FTIR,and GPC analyses. It is demonstrated that the effciency of MRDS in synthesizing PPF is higher than that of MRS.Nitrogen gas, vacuum applying position, continuously/stepwise-continuously applying vacuum and other parametersshow an important role in the polymerization of PPF in both the MRDS and MRS systems. Polyolefns J (2017) 4:27-41
کلیدواژه ها:
نویسندگان
Sara Shahbazi
Department of Medical Engineering, Amirkabir University of Technology, Tehran, Iran
Yaser Jafari
Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, Iran
Fathollah Moztarzadeh
Department of Medical Engineering, Amirkabir University of Technology, Tehran, Iran
Gity Mir Mohammad Sadeghi
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box: ۱۵۸۷۵-۴۴۱۳, Tehran, Iran