Research Article

Catalytic Production of Olefin Block Copolymers via Chain Shuttling Polymerization

+ See all authors and affiliations

Science  05 May 2006:
Vol. 312, Issue 5774, pp. 714-719
DOI: 10.1126/science.1125268

You are currently viewing the abstract.

View Full Text

Via your Institution

Log in through your institution

Log in through your institution


Abstract

We report a catalytic system that produces olefin block copolymers with alternating semicrystalline and amorphous segments, achieved by varying the ratio of α-olefin to ethylene in the two types of blocks. The system uses a chain shuttling agent to transfer growing chains between two distinct catalysts with different monomer selectivities in a single polymerization reactor. The block copolymers simultaneously have high melting temperatures and low glass transition temperatures, and therefore they maintain excellent elastomeric properties at high temperatures. Furthermore, the materials are effectively produced in economically favorable, continuous polymerization processes.

View Full Text

Related Content