Polypropyolene-Phenol Formaldehyde-Based Compatibilizers.lll.Application in PP/PBT and PP/PPE Blends

摘要

A new class of compatibilizers suitable for blends or alloys of polypropylene (PP) and engineering polymers having aromatic residues or functionality complimentary to hydroxyl were evaluated in blends of isotacgtic PP and poly(butylene terephthalate) (PBT),and poly(phenylene ether)(PPE)PP-based blends with 10-30wt% PBT or PPE were studied. From response modeling of the PP/PBT and PP/PPE blends, it was evident that the viscosity ratio among the blend component,compatibilizer content, and PBT or PPE content were important for the final blend properties. Impact strength was observed to be the most sensitive response to blend compatibilization. The PP-g-PF compatibilizer was observed to be more efficient in blends of PBT than of PPE.The main reason for that was the availability of reactive end-groups in the case of PBT, making covalent bonding between the compatibilizer and PBT possible.