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Rheology and physical properties of ternary blends containing a thermotropic liquid crystalline copolyester
Author(s) -
Hong Soon Man,
Kim Byoung Chul
Publication year - 1994
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760342105
Subject(s) - copolyester , thermotropic crystal , materials science , rheology , ternary operation , liquid crystalline , liquid crystal , chemical engineering , polymer science , composite material , polymer chemistry , polymer , polyester , optoelectronics , computer science , engineering , programming language
Ternary blends of polyarylate (PAR) U‐Polymer 100, thermotropic liquid crystalline copolyester (LCP) Vectra A950, and a block copolyesterether Hytrel 7246 were investigated in terms of rheological properties, morphology, and mechanical properties. The PAR/Hytrel blend exhibited melting point depression and gave a unique single T g over the entire range of blend compositions. Addition of Hytrel to the PAR/LCP blend decreased both dynamic viscosity and storage modulus over the normal processing temperature range. Further, it notably reduced the voids between the LCP domains and the matrix, and improved the mechanical properties. The optimum usage level of Hytrel proved to be 2 phr.