Article

Polymer Bulletin

, Volume 32, Issue 4, pp 471-477

Homogeneous nucleation of the dispersed crystallisable component of immiscible polymer blends

  • O. O. SantanaAffiliated withGrupo de Polímeros USB, Departamento de Ciencia de los Materiales, Universidad Simón Bolívar
  • , A. J. MüllerAffiliated withGrupo de Polímeros USB, Departamento de Ciencia de los Materiales, Universidad Simón Bolívar

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Summary

Immiscible melt mixed blends of a crystallisable polyolefin (isotactic polypropylene, PP) and atactic polystyrene (PS) were prepared in a wide composition range. It was found that when PP is the major component in the blend its crystallisation behaviour is not affected by blending it with PS. However if PP is the minor component, it will be dispersed in the immiscible PS matrix, hence the nucleation mechanism changes from predominantly heterogeneous to predominantly homogeneous as long as the size of the dispersed PP droplets is below a critical value (of the order of 1–2 μm).