Phase behavior of polyolefin block copolymers

Frank S Bates, J. H. Rosedale, K. A. Koppi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Three sets of model polyolefin block copolymers were prepared through the anionic polymerization of polydiene precursors, followed by heterogeneous catalytic hydrogenation. Poly(ethylene-propylene) (PEP), poly(ethylene) (PE), and poly(ethylethylene) (PEE) where combined to yield PEP-PEE, PEP-PE, and PE-PEE- diblock copolymers with varying molecular weights and compositions. Equilibrium phase behavior was established using small angle neutron scattering (SANS) and rheological measurements conducted on quenched and shear-oriented specimens. The occurrence of multiple ordered phases has been documented in all three polyolefin block copolymers and is attributed to differences in the block statistical segment lengths. These results will be discussed in the context of universal block copolymer phase behavior.

Original languageEnglish (US)
Title of host publicationPolymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering
PublisherPubl by ACS
Number of pages1
Volume67
ISBN (Print)0841222169
StatePublished - Dec 1 1992
EventProceedings of the American Chemical Society Division of Polymeric Materials - Science and Engineering - Washington, DC, USA
Duration: Aug 23 1992Aug 27 1992

Other

OtherProceedings of the American Chemical Society Division of Polymeric Materials - Science and Engineering
CityWashington, DC, USA
Period8/23/928/27/92

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