| 초록 |
An effective Flory-type interaction parameter χcRPA is suggested here from a compressible random-phase approximation (cRPA) theory to analyze microphase separation behavior of compressible block copolymer systems. It is found that NχcRPA, where N is the total chain size, replaces its incompressible cousin, Nχ, in Leibler's theory as a relevant parameter for microphase sepration in the compressible situation, where not only microphase separation upon cooling but also microphase separation upon heating are observed in some selected copolymers. Through this newly defined NχcRPA, the feasibility of immiscibility loop phase behavior in block copolymers is investigated.
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