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Poly ( ether imide ) 와 열방성 액정 고분자 블렌드의 물성
이헌상,김병현,김우년,현재천 ( Heon Sang Lee,Byung Hyun Kim,Woo Nyon Kim,Jae Chun Hyun ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.5
Blends of poly(ether imide)(PEI) and a thermotropic liquid crystalline polymer(LCP) prepared by screw extrusion have been investigated by differential scanning calorimetry(DSC) and scanning electron microscopy(SEM). From the measured glass transition temperature(T_g) and specific heat increment(△C_p) at the T_g, the LCP appears to dissolve more in the PEI-rich phase than does the PEI in the LCP-rich phase. The polymer-polymer interaction parameter(X_(12)) and the degree of disorder(y / x₁) of LCP were investigated using the lattice theory in which the anisotropy of LCP was considered, The polymer-polymer interaction parameter(X_(12)) was determined and found to be 0.179±0.006 for the extruded blends at 320℃. Degree of disorder(y/x₁) of LCP in the conjugate phase increases with the increase of PEI weight fraction in the PEI-LCP blends.