Preparation of ultrahigh molecular weight ethylene/1-octene block copolymers using ethylene pressure pulse feeding policies
Literature Information
Publication Date
2015-04-07
DOI
10.1039/C5PY00380F
Impact Factor
5.582
Authors
Weifeng Liu, Andrew Toye Ojo, Wen-Jun Wang, Hong Fan, Bo-Geng Li, Shiping Zhu
View Original
Abstract
Ethylene pressure pulse feeding policies were employed in ethylene/1-octene living copolymerization with fluorinated FI-Ti catalyst. Ultrahigh molecular weight ethylene/1-octene block copolymers having hard-soft diblock structure and hard-soft-hard triblock structure were obtained. The soft blocks had high 1-octene content, while the hard blocks were mainly ethylene. The blocky structures were confirmed by NMR and high temperature GPC analyses. DSC measurements also showed that the hard blocks exhibited a high level of crystallinity and the soft blocks gave good low temperature flexibility. The block copolymers thus prepared have potential in thermoplastic elastomer applications.
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Polymer Chemistry
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