What is microphase separation?
What is microphase separation?
Microphase separation is the term used to describe the type of chain segregation which is able to occur in block and graft copolymers in the bulk state and in concentrated solution, and the structures generated by the packing of domains on the macrolattice are termed mesomorphic structures.
Which is a microphase?
(physics) A relatively small-scale part of a solid phase that has a different morphology than that of its surroundings. noun. 1.
What are block copolymers used for?
Block copolymers are a class of polymers in which different kinds of polymer chains are chemically bonded. There are A-B type diblock copolymers, A-B-A type triblock copolymers, A-B-C type triblock copolymers, and so on. Block copolymers have been used for polymer surfactant (see, for example, Section 8.7.
What is the difference between polymer and copolymer?
Summary – Polymer vs Copolymer According to the type of monomers, there are two major types called Homopolymers and Copolymers. The main difference between polymer and copolymer is that polymer is any giant molecule made out of same or different monomers whereas a copolymer is a polymer made out of different monomers.
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.
How are block copolymers synthesized?
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 the difference between a homopolymer a statistical copolymer and a block copolymer?
We should know that the main difference between copolymer and homopolymer is that copolymers are formed by using two different types of monomers, whereas homopolymers are produced by using a single type of monomer.
What is the difference between a monomer and a copolymer?
Monomer – a small molecule which may react chemically to link together with other molecules of the same type to form a large molecule called a polymer. Copolymer – a polymer made from more than one kind of monomer. Homopolymer – a polymer consisting of identical monomer units.
What is micro-microphase separation?
Microphase separation is the term used to describe the type of chain segregation which is able to occur in block and graft copolymers in the bulk state and in concentrated solution, and the structures generated by the packing of domains on the macrolattice are termed mesomorphic structures.
What are the types of crystallizable block copolymers?
Studies of microphase separation have been made on many regular block copolymers containing crystallizable blocks. The types of crystallizable blocks which have been examined include polyethers,45, 116–122 polyamides, 123, 124 polypeptides 48, 125 and polyesters. 126
What determines the morphology of microdomains of AB Diblock polymers?
Hasegawa et al. first presented the morphology of the microdomains of an AB diblock polymer formed as a consequence of the liquid-liquid microphase separation of the constituent polymers A and B at or near the air surface in contrast to the morphology of the bulk determined by TEM observation [ 50 ].
