Ethylene-butene blends dependence

Blends. Blends of iPP with poly(styrene)-6Zoc -poly(ethylene-co-l-butene) were prepared imder various conditions and imaged by afm, where macrophase separation because of incompatibility of the components was observed (Fig. 17). The degree of phase segregation was shown to be dependent on the thermal history of the sample (118). Blends of iPP and different poly(ethylene-butene) (PEB) copolymers were imaged. The authors foimd that iPP and PEB containing 88% butene were miscible, and PEB containing <88% butene were partially to totally immiscible, and polybutene (100% butene) was partially miscible. So, there is a narrow window of miscibility for these blends (119). 

Fig. 11,27 The dependence of the crystallization temperature, Tc, for linear polyethylene blends with different copolymers as a function of composition. hydrogenated poly(butadiene) A ethylene-hexene o ethylene-butene. Crystallization was carried out by cooling at 10 K min from melt. (50)...

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