Qh. Lin et Af. Yee, MECHANICAL-PROPERTIES OF IN-SITU COMPOSITES BASED ON POLYCARBONATE AND A LIQUID-CRYSTALLINE POLYMER, Polymer, 35(16), 1994, pp. 3463-3469
The mechanical properties of in situ composites based on blends of pol
ycarbonate and a liquid crystalline copoly(ester amide) (Vectra B950)
have been studied as functions of the liquid crystalline polymer (LCP)
concentration and the draw ratio, a processing parameter. It is shown
that both the elastic modulus and the tensile strength of the in situ
composites increase steadily with the LCP concentration and the draw
ratio. However, the ultimate tensile strain decreases with these two p
arameters. A model is proposed for the longitudinal elastic modulus of
the in situ composites, which is based on the Halpin-Tsai equation an
d Northolt's model for the LCP phase. The experimental elastic moduli
of the in situ composites are found to conform fairly well with the th
eoretical values derived from the model.