Copolymer formulation for directed self assembly, methods of manufacture thereof and articles comprising the same

A composition comprising:

• an intimate mixture of complete volumes of 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 comprising a homopolymer or a random copolymer;
• wherein the average surface energy of the additive polymer lies between the surface energy of the first polymer and the surface energy of the second polymer of the block copolymer;
• where the additive polymer comprises a reactive functional moiety that forms a bond or a complex or a coordinate with the substrate upon being disposed on the substrate;
• where the reactive functional moiety is unreacted when it is a part of the composition;
• where the block copolymer is present in the composition in a weight ratio of 2:1 to 5:1 relative to the additive polymer;
• and
• a solvent.