The Effect of Alkyl Side Chain and Additives on the Anionic Polymerization of Isocyanates with Carbamate Group
Copyright policy )The Effect of Alkyl Side Chain and Additives on the Anionic Polymerization of Isocyanates with Carbamate Group
AbstractThe synthesis of new isocyanate monomers and their polymerization by anionic route is reported. Reaction of 1,6‐diisocyanatohexane with aliphatic alcohols such as methanol, n‐propanol and n‐pentanol in 1:0.5 molar ratios was carried out in the presence of pyridine such that one NCO group remained unreacted. The anionic polymerization of n‐alkoxycarbonylaminohexyl isocyanates was carried out using sodium napthalenide (Na‐Naph) initiator in the presence of 15‐crown‐5 (15C5) and sodium tetraphenylborate as the additives. While polymerization of n‐propyloxycarbonylaminohexyl isocyanate (PAHI) and n‐pentanoxycarbonylaminohexyl isocyanate (PEAHI) was feasible that of methoxycarbonylaminohexyl isocyanate (MAHI) led to an insoluble material. The polymers were isolated in high yields with NaBPh4 as the additive.
- Gwangju Institute of Science and Technology Korea (Republic of)
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