Cloisite 15Aº nanoclay as an effective PTC for the epoxidation of hydroxyl terminated polybutadiene (HTPB)

• Main Authors: Mir Mohammad Alavi Nikje, Maryam Gholi Nataj
• Format: Article
• Language: English
• Published: Associação Brasileira de Polímeros 2014-10-01
• Series: Polímeros
• Subjects: Hydroxyl-terminated polybutadiene (HTPB); epoxidation; dimethyl dioxirane; Cloisite 15Aº
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282014000500003&lng=en&tlng=en

A simple method is reported for the epoxidation of hydroxyl-terminated polybutadiene (HTPB) by using in-situ generated dimethyl dioxirane (DMD) as an oxidant and Cloisite 15Aº nanoclay as a phase-transfer catalyst (PTC). In order to find the optimum reaction conditions, real time analyses of the products as well as epoxidation progress, followed by ¹HNMR and FTIR techniques at various reaction times and different PTC concentrations, were done. Obtained data revealed the selectivity of DMD/ Cloisite 15Aº in predominant cis double bonds epoxidation in comparison with trans and pendant vinyl functional groups.