| 主权项 |
1. A process for dissolving a polymeric material, the process comprising contacting the polymeric material with an ionic liquid, the ionic liquid comprising an anion and a cation characterized in that the cation is a nitrogen-containing cation of formula (I):
N+HRR′R″ (I)wherein:
R is a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from nitrogen-containing functional groups, alkyl, alkenyl, alkoxy, hydroxy, carbonyl and carboxyl groups; or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate, or silyl groups; and R′ and R″, which may be the same or different, each represent H or a hydrocarbyl group optionally interrupted by one or more ether or thioether linkages, and optionally substituted with one or more substituents selected from nitrogen-containing functional groups, alkyl, alkenyl, alkoxy, hydroxy, carbonyl and carboxyl groups; or from thiol, alkythio, sulphonyl, thiocyanate, isothiocyanate, azido, hydrazino, halogen, boronate, or silyl groups; or wherein any two or three of R, R′ and R″ are joined together with the N to form a cyclic group. |
