Kinetic study of cis-polybutadiene epoxidation by using 1HNMR spectroscopy in buffered oxone® solution with tetra-n-butyl ammonium bromide as phase transfer catalyst (PTC)

الموضوعات : Journal of the Iranian Chemical Research

Farzaneh Hossein Poor Rajabi ¹ (Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran)
Mir Mohammad Alavi Nikje ² (Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran)
Bahman Vasheghani Farahani ³ (Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran)
Narges Sabouri ⁴ (Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran)

تاريخ الإرسال : 12 الأربعاء , ذو القعدة, 1431 تاريخ التأكيد : 22 الجمعة , ربيع الأول, 1432 تاريخ الإصدار : 15 الأحد , ربيع الثاني, 1432

الکلمات المفتاحية: Kinetic study, Epoxidation, Polybutadiene, Oxone®, Dimethyldioxirane, Tetra-n-butyl ammonium bromide,

ملخص المقالة :

Cis-polybutadiene was functionalized using in–situ generated DMD as oxidant and tetra-n-butyl ammonium bromide as phase transfer catalyst (PTC). The epoxidation process was investigated by 1HNMR spectroscopy. 1HNMR spectrum analysis of products confirms the absence of ring opening side products in epoxidation reaction. Various factors such as reaction temperature, reaction time and the concentrations of oxidant, PTC and polymer are also examined in detail. Kinetic study showed that the catalytic epoxidation reaction of cis-polybutadiene is first-order with respect to double bonds and activation energy for the reaction is 22.82 KJ/mol.

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