Highly regioselective palladium/copper-catalysed cross-coupling reactions of terminal alkynes and allenes
摘要:
The Pd/Cu-catalysed cross-coupling reaction of heterocyclic terminal alkynes and allene/allenyl heterocycles affords novel trisubstituted en-ynes in good yield. (C) 2003 Elsevier Ltd. All rights reserved.
Copolymer formulation for directed self-assembly, methods of manufacture thereof and articles comprising the same
申请人:Dow Global Technologies LLC
公开号:US10351727B2
公开(公告)日:2019-07-16
Disclosed herein is a pattern forming method comprising disposing upon a substrate a composition comprising a block copolymer; where the block copolymer comprises a first polymer and a second polymer; where the first polymer and the second polymer of the block copolymer are different from each other and the block copolymer forms a phase separated structure; an additive polymer; where the additive polymer comprises a bottlebrush polymer; and where the bottlebrush polymer comprises a polymer that has a lower or a higher surface energy than the block copolymer; and a solvent; and annealing the composition to facilitate domain separation between the first polymer and the second polymer of the block copolymer to form a morphology of periodic domains formed from the first polymer and the second polymer; where a longitudinal axis of the periodic domains are parallel to the substrate.
COPOLYMER FORMULATION FOR DIRECTED SELF-ASSEMBLY, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME
申请人:Dow Global Technologies LLC
公开号:US20160251508A1
公开(公告)日:2016-09-01
Disclosed herein is a composition comprising a block copolymer; where the block copolymer comprises a first polymer and a second polymer; where the first polymer and the second polymer of the block copolymer are different from each other and the block copolymer forms a phase separated structure; an additive polymer; where the additive polymer comprises a bottle brush polymer; where the bottle brush polymer comprises a homopolymer that is the chemically and structurally the same as one of the polymers in the block copolymer or where the additive polymer comprises a graft copolymer that has a preferential interaction with one of the blocks of the block copolymers; and a solvent.