Abstract
The thermal and viscoelastic properties of blends of polypropylene (PP) with thermotropic liquid crystalline copolyesters (LCP) have been investigated. (1) Thermal characteristics, change of tan δ peaks, and SEM observation on the fracture surfaces of PP-LCP blends indicate behaviour characteristic of incompatible blend systems. (2) Ternary blend systems containing chlorinated polypropylene (Cl-PP) showed increased interfacial interaction between the LCP and the matrix in comparison with the binary blend. (3) Blends containing dimethylglyoxine (DMG) showed further improvement in interfacial interaction between the LCP and matrix. DMG is believed to act as a crosslinking agent.
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