Copolymer formulation for directed self assembly, methods of manufacture thereof and articles comprising the same
View Patent ↗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; and an additive polymer; where the additive polymer comprises a reactive moiety that is reacted to a substrate upon which it is disposed; and where the additive 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 random copolymer that has a preferential interaction with one of the blocks of the block copolymers.
1. A composition comprising:
an intimate mixture of complete volumes of a blend of block copolymers; where each block copolymer comprises a first polymer and a second polymer; where the first polymer and the second polymer of each of the block copolymers are different from each other and each of the block copolymers forms a phase separated structure; where the block copolymer is poly(styrene-b-vinyl pyridine), poly(styrene-b-butadiene), poly(styrene-b-alkenyl aromatics), poly(isoprene-b-ethylene oxide), poly(styrene-b-(ethylene-propylene)), poly(ethylene oxide-b-caprolactone), poly(butadiene-b-ethylene oxide), poly(styrene-b-t-butyl (meth)acrylate), poly(methyl methacrylate-b-t-butyl methacrylate), poly(ethylene oxide-b-propylene oxide), poly(styrene-b-tetrahydrofuran), poly(styrene-b-isoprene-b-ethylene oxide), poly(styrene-b-trimethylsilylmethyl methacrylate), poly(methyl methacrylate-b-dimethylsiloxane), poly(methyl methacrylate-b-trimethylsilylmethyl methacrylate),
an additive polymer; where the additive polymer comprises a reactive moiety that is operative to react with a substrate upon which it is disposed; and where the additive polymer comprises a homopolymer that is the chemically and structurally the same as one of the polymers in each of the block copolymers or where the additive polymer comprises a random copolymer that has a preferential interaction with one of the blocks of each of the block copolymers; and
a solvent.
2. The composition of claim 1 , where the additive polymer is a polystyrene, a polysiloxane, a polymethylmethacrylate, a polyacrylate, a polyvinylacetate, a polydiene, a polyether a polyester, a polyorganogermane, or a combination comprising at least one of the foregoing polymers.
3. The composition of claim 1 , where the additive polymer is a hydroxyl terminated polystyrene, hydroxyl terminated polydimethylsiloxane, hydroxyl terminated poly(methylmethacrylate-random-trifluoroethylmethacrylate), a hydroxyl terminated poly(methylmethacrylate-random-dodecafluoroheptylmethacrylate), or a combination comprising at least one of the foregoing polymers.
4. The composition of claim 1 , where the composition when annealed to temperatures of 200 to 450° C. forms horizontal cylinders or spheres.