Polypropylene was blended with a terpolymer (containing ethylene and butylene as well as propylene). Melts of some blends showed liquid liquid phase separation at certain temperatures. The separated region was in the form of a closed loop and was found at low homopolyrner content. This is the type of liquid liquid phase separation which has previously been observed for blends of polyethylene homopolymers with copolymers (linear with branched polyethylenes).
Посилання на статтю:
Liquid liquid phase separation in polypropylene homopolymer/polypropylene copolymer melts / C. C. Puig, M. J. Hill* and P. J. Barham // Polymer. – 1993. – Vol 34. – P. 3117-3119.