Radical polymerization of vinyl acetate in the presence of chain transfer agents: determination of chain transfer constants and activation energy of transfer
Joint Authors
Najim, Tariq Suhayl
Aliwi, Salah Muhsin
Ali, Asma Mahmud
Source
Issue
Vol. 2009, Issue 36 (31 Dec. 2009), pp.660-666, 7 p.
Publisher
University of Babylon College of Sciences
Publication Date
2009-12-31
Country of Publication
Iraq
No. of Pages
7
Main Subjects
Topics
Abstract AR
تمت بلمرة خلات الفنيل بالطريقة البلكية (بدون استخدام مذيب) بوجود و بعدم وجود مركبات الأمين كعوامل ناقلة للسلسلة.
تم تعيين ثوابت انتقال السلسلة بمدى معين من درجات الحرارة بين (85-65م).
استخدمت معادلة مايو في تعيين ثوابت انتقال السلسلة للبروبيل أمين و ثنائي بروبيل أمين ن-اثيل انيلين و كان ترتيب قيم ثوابت الانتقال كالآتي : N-ethyl aniline > dipropyl amine > propyl amine إن القيم العالية لثوابت انتقال السلسلة لل ن-اثيل انيلين اعزي إلى الريزونانس الذي يعانيه الجذر الحر الناتج من عملية الانتقال.
تم كذلك تعيين طاقات التنشيط لعمليات الانتقال في أنظمة البلمرة الحالية و ذلك باستخدام علاقة ارينهوس و التي وجد بأنها تتفق مع قيم ثوابت انتقال السلسلة.
Abstract EN
Vinyl acetate has been polymerized by bulk process with and without different types of amines compunds as chain transfer agents.
The various chain transfer constants (Cs) and their temperature dependence over a range of temperatures of (65–85°C) have been determined and discussed.
The chain transfer constants of propylamine, dipropylamine and N-ethylaniline were evaluated by using May plot, their values found as follows : N–ethyl aniline > dipropyl amine > propyl amine The high values of chain transfer constants of N-ethyl aniline were attributed to the resonance stability of the radical derived after the transfer process.
Activation energies of the chain transfer processes in the present polymerization systems were also determined using the usual Arrhenius relationship, which were found inconsistent with the values of chain transfer constants.
American Psychological Association (APA)
Aliwi, Salah Muhsin& Najim, Tariq Suhayl& Ali, Asma Mahmud. 2009. Radical polymerization of vinyl acetate in the presence of chain transfer agents: determination of chain transfer constants and activation energy of transfer. National Journal of Chemistry،Vol. 2009, no. 36, pp.660-666.
https://search.emarefa.net/detail/BIM-241018
Modern Language Association (MLA)
Najim, Tariq Suhayl…[et al.]. Radical polymerization of vinyl acetate in the presence of chain transfer agents: determination of chain transfer constants and activation energy of transfer. National Journal of Chemistry No. 36 (2009), pp.660-666.
https://search.emarefa.net/detail/BIM-241018
American Medical Association (AMA)
Aliwi, Salah Muhsin& Najim, Tariq Suhayl& Ali, Asma Mahmud. Radical polymerization of vinyl acetate in the presence of chain transfer agents: determination of chain transfer constants and activation energy of transfer. National Journal of Chemistry. 2009. Vol. 2009, no. 36, pp.660-666.
https://search.emarefa.net/detail/BIM-241018
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 666
Record ID
BIM-241018