M. El Fray et J. Slonecki, Multiblock terephthalate copolymer as impact modifier for poly(propylene)/poly(butylene terephthalate) blends, ANGEW MAKRO, 266, 1999, pp. 30-36
The melt polycondensation method was investigated for the synthesis of a mu
ltiblock copolymer. The copolymer consisted of hard segments of poly(butyle
ne terephthalate) (PBT) and soft segments of dimerised fatty acid. This mul
tiblock copolymer was characterised by H-1 and C-13 NMR and FTIR spectrosco
pies and differential scanning calorimetry. The 1H NMR method was used for
estimating quantitatively the amount of the hard/soft segments. The polymer
morphology was characterised using light microscopy and transmission elect
ron microscopy. The investigated polymer was used in a small amount as an a
dditive to poly(propylene)/PBT blends in order to evaluate its influence on
the morphology and impact properties of these blends.