A linear polyethylene (LPE) has been blended with a series of random ethylene-octene copolymers of differing octene content. Melts of blends containing the lowest octene contents (2, 3, 5 and 8 mol%) showed liquid-liquid phase separation at some temperatures and for some compositions. The phase-separated regions were in the shape of closed loops and asymmetrically placed at low LPE content. This behaviour has been found previously for LPE/branched PE blends. However, unexpectedly, the phase-separated loops became smaller as the octene content of the copolymer increased. Blends of LPE with a 12 tool% octene copolymer showed extensive separation and rather different morphologies
Посилання на статтю:
Liquid-liquid phase segregation in blends of a linear polyethylene with a series of octene copolymers of differing branch content / M. J. Hill* and P. J. Barham // Polymer. – 1993. – Vol 34. – P. 2975-2980.