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Polyolefins Journal، جلد ۴، شماره ۱، صفحات ۲۷-۴۱
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عنوان انگلیسی Two novel methods for synthesizing poly (propylene fumarate): Technical aspects and role of vacuum and N2 purging effects
چکیده انگلیسی مقاله Poly (propylene fumarate) (PPF), a linear unsaturated polyester consisting of alternating propylene glycol and fumaric acid units, can be cured in vivo to fill the skeletal defects with minimal surgical intervention. Many different methods have been reported for synthesizing PPF, but none of them gives a clear method. The present paper introduces two new methods in PPF synthesis: Modified 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 vacuum applying position and reactor) as well as nitrogen gas (used continuously or only as an N2 blanket) on the PPF synthesis have been studied. The PPF obtained using optimum reaction condition has been characterized by using NMR, FTIR, and GPC analyses. It is demonstrated that the efficiency of MRDS in synthesizing PPF is higher than that of MRS. Nitrogen gas, vacuum applying position, continuously/stepwise-continuously applying vacuum and other parameters show an important role in the polymerization of PPF in both the MRDS and MRS systems.
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نویسندگان مقاله سارا شهبازی |
department of medical engineering, amirkabir university of technology, tehran, iran
سازمان اصلی تایید شده: دانشگاه صنعتی امیرکبیر (Amirkabir university of technology)

یاسر جعفری |
department of analytical chemistry, faculty of chemistry, university of kashan, kashan, iran
سازمان اصلی تایید شده: دانشگاه کاشان (Kashan university)

فتح الله مضطرزاده |
department of medical engineering, amirkabir university of technology, tehran, iran
سازمان اصلی تایید شده: دانشگاه صنعتی امیرکبیر (Amirkabir university of technology)

گیتی میر محمد صادقی | mir mohamad sadeghi
department of polymer engineering and color technology, amirkabir university of technology, p.o. box 15875-4413, tehran, iran
سازمان اصلی تایید شده: دانشگاه صنعتی امیرکبیر (Amirkabir university of technology)

نشانی اینترنتی http://poj.ippi.ac.ir/article_1354_9a295ca549a528e68226168935250336.pdf
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/531/article-531-279613.pdf
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زبان مقاله منتشر شده en
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