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Two novel methods for synthesizing poly (propylenefumarate): Technical aspects and role of vacuum and N2purging effects

عنوان مقاله: Two novel methods for synthesizing poly (propylenefumarate): Technical aspects and role of vacuum and N2purging effects
شناسه ملی مقاله: JR_POJ-4-1_002
منتشر شده در شماره 1 دوره 4 فصل Winter and Spring در سال 1395
مشخصات نویسندگان مقاله:

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

خلاصه 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

کلمات کلیدی:
Poly (propylene fumarate); modifed reflux system; mixed reflux-distillation system

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/602921/