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3.It is a general observation that most attempts to blend polymers together results in phase separation....

3.It is a general observation that most attempts to blend polymers together results in phase separation. Explain why this is the case.

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Answer #1

The phase seperation while blending occurs because of the non-compatibility of the polymers with each other. When two polymers are mixed togather they usually seperate because of the slight repulsive interaction existing between monomers of individual polymers. The phase seperation also occurs because of very small interaction between the monomers of the polymers, even though the monomer-monomer interaction is very small with each other it is related to the fact that polymer chain consists of a very large number of monomer units. Inspite of the monomer-monomer interaction is small in the polymer blend, the interchain interaction can be large which leads to phase separation.

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