RYU, C SEO, Y HWANG, SS HONG, SM PARK, TS KIM, KU 2024-01-21T21:33:50Z 2024-01-21T21:33:50Z 2022-01-10 1994-09 0930-777X https://pubs.kist.re.kr/handle/201004/145519 As a part of continuous study to search for the high performance in situ composite, this study examines the miscibility of liquid crystalline poly(ester imide) (PEsI) with poly(ether imide) (PEI) and its effect on the mechanical properties and the morphology of the blends of these polymers. Liquid crystalline polymers (LCPs) were synthesized from trimellitic anhydride and alpha,omega-diaminoalkane with 8, 10, 12 methylene groups. Thermal condensation of these diacids with 4,4'-diacetoxybiphenyl yielded the corresponding imides of thermotropic homopolyesters. Optical polarized micrographs show that the synthesized poly(ester imides) have the smectic structures. Patial miscibility was observed from the shift of the glass transition temperature determined by differential scanning calorimetry. Increasing concentration of the liquid crystalline PEsI in the PEI/PEsI blends shifted the glass transition temperature of the PEI phase to a lower temperature. Mechanical properties of the PEI/PEsI blends were changed with the number of methylene units in PEsI. Morphologies of the partially miscible system were found to be quite different from those of an immiscible system. Strong adhesion between the matrix (PEI) and dispersed phase (LCP) was observed, but fine fibril formation was not possible due to the absence of smectic-nematic transition. English CARL HANSER VERLAG INSITU COMPOSITES THERMOPLASTIC COMPOSITES MISCIBLE BLENDS ETHER KETONE) POLYMER POLYETHERIMIDE POLYESTER MORPHOLOGY ADHESION FIBERS MISCIBILITY AND MECHANICAL-PROPERTIES OF POLY(ETHER IMIDE) LIQUID-CRYSTALLINE POLY(ESTER IMIDE) BLENDS Article 10.3139/217.940266 1 INTERNATIONAL POLYMER PROCESSING, v.9, no.3, pp.266 - 272 INTERNATIONAL POLYMER PROCESSING 9 3 266 272 scie A1994PR11900012 Engineering, Chemical Polymer Science Engineering Polymer Science Article INSITU COMPOSITES THERMOPLASTIC COMPOSITES MISCIBLE BLENDS ETHER KETONE) POLYMER POLYETHERIMIDE POLYESTER MORPHOLOGY ADHESION FIBERS in situ composite