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A copper based catalyst for poly-urethane synthesis from discarded motherboard†
Soumitra Barman,Bibudha Parasar,Pradip Kundu
RSC Advances Pub Date : 08/04/2016 00:00:00 , DOI:10.1039/C6RA14506J
Abstract

By displaying thermoplastic, elastomeric and thermoset behavior depending on their chemical and morphological properties, polyurethanes have caught attention since 1937 when Bayer and his co-workers made them for the first time using the reaction of polyester diol and isocyanate. To produce a great range of versatility, various isocyanates can be used for making linear or cross-linked polyurethanes. Here we used IPDI as isocyanate and bamboo polyol as polyalcohol to prepare hard polyurethane and polyurethane foam. A cheap copper-based catalyst has been synthesized from discarded motherboard to replace the industrially used tin-based catalyst DBTDL [dibutyltin(IV) dilaurate] which is expensive and we found almost similar productivity compared to conventional catalyst DBTDL. By optimizing catalyst loading, time and temperature, a 97% yield was obtained with 1.8 mol% catalyst loading in 2 hours. A plausible mechanism has also been proposed.

Graphical abstract: A copper based catalyst for poly-urethane synthesis from discarded motherboard
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