What are block copolymers used for?
Block copolymers have been used for polymer surfactant (see, for example, Section 8.7. 1), high-impact plastics, and other applications. Recently, block copolymers are applied to more advanced materials, such as nano-fabrication and quantum dots.
What is block copolymer example?
Block copolymers are made up of blocks of different polymerized monomers. For example, polystyrene-b-poly(methyl methacrylate) or PS-b-PMMA (where b = block) is usually made by first polymerizing styrene, and then subsequently polymerizing methyl methacrylate (MMA) from the reactive end of the polystyrene chains.
How do you make block copolymers?
Block copolymers are normally prepared by controlled polymerization of one monomer, followed by chain extension with a different monomer(1) to form AB or ABC block copolymers.
What is self-assembly of block copolymers?
Self-assembly of block copolymers (BCPs) provides a versatile strategy for controllable preparation of a broad range of functional materials with different ordered structures. In recent decades, this soft-templating strategy has been widely utilized for preparing a wide range of mesoporous materials.
What are statistical copolymers?
Statistical copolymers are copolymers in which the sequential distribution of the monomeric units obeys known statistical laws; for example the monomer sequence distribution may follow Markovian statistics of zeroth (Bernoullian), first, second, or higher order.
What are block copolymer micelles?
Abstract. Block copolymer micelles are generally formed by the self-assembly of either amphiphilic or oppositely charged copolymers in aqueous medium. The hydrophilic and hydrophobic blocks form the corona and the core of the micelles, respectively.
What are graft copolymers?
Graft copolymer is a type of copolymer in which one or more blocks of homopolymer are grafted as branches onto a main chain, meaning it is a branched copolymer with one or more side chains of a homopolymer attached to the backbone of the main chain.
Why do block copolymers self assemble?
Self-assembly of block copolymers can be used to design and control the shape and dimension of resulting nanostructures. The versatility and scalability of this method makes them highly attractive for the synthesis of advanced materials.
What is block polymers?
A block copolymer is defined as a polymer comprising molecules in which there is a linear arrangement of blocks, a block being defined as a portion of a polymer molecule in which the monomeric units have at least one constitutional or configurational feature absent from the adjacent portions.
Can block copolymers form different ordered phases at nanoscopic length scales?
Block copolymers are capable of forming different ordered phases at nanoscopic length scales. When block copolymers are placed with hard templates of different shapes and sizes, confining environments strongly constrain the possible morphologies that can be formed by the block copolymers.
What is a block copolymer?
Ian W. Hamley, in Amphiphilic Block Copolymers, 2000 Block copolymers are macromolecules comprised of two or more chemically different chains joined together by covalent bonds.
What is the best introductory book on Polymer Science?
Roderic P. Quirk, Lewis J. Fetters, in Comprehensive Polymer Science and Supplements, 1989