TY - JOUR
T1 - Morphological characteristics and the modulus of liquid crystalline polymer fibers dispersed in a thermoplastic matrix
AU - Yi, Xiao Su
AU - Shen, Lie
N1 - Funding Information:
This research was supported by the National Natural Science Foundation of China (NNSFC) (grants 58903427 and 59183016). the National Advanced Materi als Co mmittee of China (NAMCC) (gra nt 86371527). and the Deutsche Akademische Austauschdienst (DAAD) Foundation (Ge rmany).
PY - 1997
Y1 - 1997
N2 - The morphology of a polycarbonate (PC)-based blend containing a thermotropic liquid crystalline polymer (LCP) component has been characterized in terms of the layer structure, layer thickness, aspect ratio, and number of the shear-induced fibers developed during injection molding. This dispersed LCP phase was still embedded as fibers and deformed droplets in the PC matrix, and their tensile modulus was usually unknown due to the testing problems. Based on the morphological characteristics, a calculation procedure has been developed to estimate the modulus of these fibers and droplets by using a set of micromechanical models. It has been found that the average tensile modulus of these shear-induced LCP fibers and deformed droplets seems to be a material consiant, independent of the injection molding condition, i.e., the shear flow condition. For the LCP Vectra A950 studied, the calculated tensile modulus was 24.0 GPa. This value was in fair agreement with that reported in literature. It was larger than that of the injection-molded pure LCP samples and smaller than that of the drawn pure LCP strand.
AB - The morphology of a polycarbonate (PC)-based blend containing a thermotropic liquid crystalline polymer (LCP) component has been characterized in terms of the layer structure, layer thickness, aspect ratio, and number of the shear-induced fibers developed during injection molding. This dispersed LCP phase was still embedded as fibers and deformed droplets in the PC matrix, and their tensile modulus was usually unknown due to the testing problems. Based on the morphological characteristics, a calculation procedure has been developed to estimate the modulus of these fibers and droplets by using a set of micromechanical models. It has been found that the average tensile modulus of these shear-induced LCP fibers and deformed droplets seems to be a material consiant, independent of the injection molding condition, i.e., the shear flow condition. For the LCP Vectra A950 studied, the calculated tensile modulus was 24.0 GPa. This value was in fair agreement with that reported in literature. It was larger than that of the injection-molded pure LCP samples and smaller than that of the drawn pure LCP strand.
UR - http://www.scopus.com/inward/record.url?scp=0030784352&partnerID=8YFLogxK
U2 - 10.1080/03602559.1997.10399445
DO - 10.1080/03602559.1997.10399445
M3 - Article
AN - SCOPUS:0030784352
SN - 0360-2559
VL - 36
SP - 153
EP - 165
JO - Polymer - Plastics Technology and Engineering
JF - Polymer - Plastics Technology and Engineering
IS - 1
ER -