Polyethylene face growth rate

Ueda et al. [46] have measured the crystalUzation rate of the polyethylene block within polyethylene-6-(atactic polypropylene), PE-6-aPP, with a PE volume fraction of 0.48. The crystaUization of the PE block occurs with a molten aPP block covalently bonded to it. The copolymer is reported to be in the strong segregation limit. They also found a substantially lowered crystalUzation rate as compared to an analog neat PE, which was attributed to a mo-biUty reduction of the chains close to the interphase, and to the presence of non-crystallizable aPP chains close to the growth face which couid hinder the growth process. 

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