Melt Rheological Properties of PBT/ABAS/Mica Composites

摘要

Melt rheological properties of poly (butylene terephthlate) (PBT)/poly (acrylonitrile-butyl acrylate-styrene) terpolymer (ABAS)/mica composites were studied at 0.02 to 0.14 vol fraction (Φ_f) of mica at 518 K. The shear stress vs. shear rate plots was linear and the melts obeyed power law relation. The composites melts were shear thinning. Apparent melt viscosity decreased initially up to Φ_f = 0.07 the parameter increased with further increase in Φ_f. Melt elasticity viz. extrudate swell ratio also decreased up to Φ_f = 0.07 whereas the data increased at Φ_f > 0.07. Surface treatment of mica particles by zirconate coupling agent, NZ-97, brought about further modification of the rheological properties through enhanced interaction between the matrix and the dispersed phase.