Morphology of Nascent Ziegler-Natta Polymers

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Science  29 Jul 1966:
Vol. 153, Issue 3735, pp. 539-541
DOI: 10.1126/science.153.3735.539


In the polymerization of α-olefins with heterogeneous Ziegler-Natta catalysts, the polymer is formed directly as long fibrillar units with folder chains. It is proposed that the fibrils are formed by the crystallization of polymer chains growing from the active sites on the catalyst surface, a process which is likened to root growth in whiskers.