Hong, SM Yoo, HO Hwang, SS Ihn, KJ Lee, CH 2024-01-21T12:14:43Z 2024-01-21T12:14:43Z 2021-09-04 2001-06 0032-3896 https://pubs.kist.re.kr/handle/201004/140464 Poly(ethylene 2,6-naphthalate) (PEN) and liquid crystalline polymer (LCP) blend fibers were prepared by reactive extrusion. Structures and physical properties of PEN/LCP blends were investigated with respect to blend ratio and transesterification reaction. Orientation, modulus, and thermal expansion coefficient of the PEN/LCP blend fibers were improved by increasing the draw ratio, Interfacial adhesion between PEN and LCP phases was enhanced when the blends were processed with dibutyltindilaurate (DBTDL) as reactive catalyst to promote transesterification. Optimum amount of the reaction catalyst turned out to be about 500 ppm in 75/25 PEN/LCP blend systems. Enhanced compatibility between two immiscible polymers resulted in decrease of dissipation energy in interfacial region. Thus tan delta value decreased. As a result of transesterification, density and reduction of thermal expansion coefficients of PEN/LCP blends increased by closer chain packing and higher interactions. English SOC POLYMER SCIENCE JAPAN SITU COMPOSITE SYSTEM THERMOTROPIC POLYESTER MECHANICAL-PROPERTIES FLEXIBLE SPACER TERNARY BLENDS BEHAVIOR COPOLYESTER POLY(ETHYLENE-TEREPHTHALATE) COPOLYMERS RHEOLOGY Structures and physical properties of poly(ethylene 2,6-naphthalate)/liquid crystalline polymer blends Article 10.1295/polymj.33.457 1 POLYMER JOURNAL, v.33, no.6, pp.457 - 463 POLYMER JOURNAL 33 6 457 463 scie scopus 000170320500001 2-s2.0-0034896858 Polymer Science Polymer Science Article SITU COMPOSITE SYSTEM THERMOTROPIC POLYESTER MECHANICAL-PROPERTIES FLEXIBLE SPACER TERNARY BLENDS BEHAVIOR COPOLYESTER POLY(ETHYLENE-TEREPHTHALATE) COPOLYMERS RHEOLOGY reactive extrusion modulus thermal expansion coefficient orientation structure physical properties