| abstract |
The invention relates to a nano-structured nano-structured block copolymer film at a predetermined temperature, obtained from an unstructured basic block copolymer at said predetermined temperature and at least one block comprising styrene and at least one block comprising at least one other block comprises methyl methacrylate. This block copolymer film is characterized in that it has the following modified chemical formula: (Aα (i) -co-Cγ) nb- (Bβ (k) -co-Dδ) n-1-b- (Aα (i + 1) -co-Eε) n-2-b- (Bβ (k + 1) -co-Fζ) n-3-b- b -...- (Bβ (k + x) - co-Wω) np (I) wherein: "n" represents the block number of the block copolymer, "A" represents styrene and "B" represents methyl methacrylate, or conversely, "C", "D" , "E", "F", ..., "W" respectively represent a comonomer, or a mixture of comonomers, introduced into each of the blocks of the block copolymer, the comonomer, or a mixture of co-monomers; -monomers, introduced into a styrene-based block being different from the comonomer, or mixture of comonomers, introduced into a block based on methyl methacrylate, the indices a 1 and βk represent the numbers of styrene monomer units or methyl methacrylate present in each block of the block copolymer, and are all inde endings of each other, the indices y, δ, ε, ζ ..., and ω represent the numbers of comonomer units in a given block, and are all independent of each other, the indices αi, βk , y, δ, ε, ζ ..., and ω being all greater than or equal to 1. |