Alternating ethylene-propylene

Alternating ethylene, propylene co-polymers could be obtained by the hydrogenation of polyisoprene. Starting with a mixture of ethylene and propylene, could such a polymer be made by using metallocene catalysts ... [Pg.130]

Polyisoprene on hydrogenation gives a rubber directly—an alternating ethylene-propylene polymer. Polybutadiene can give polyethylene on hydrogenation if it is all 1,4 in structure or a variety of flexible-to-rubbery ethylene-butene copolymers as the 1,2 content of the polybutadiene is increased. These polydiene structures can be incorporated as segments in anionic styrene copolymers. [Pg.41]

Tg/K = 209.2, alternating ethylene/propylene units from complete hydrogenation (98%) of polyisoprene... [Pg.297]

Myg.mol = 177000, A/yg.mor = 195000, 50 mol% propene, ryK = 225.2, alternating ethylene/propylene units from complete hydrogenation (94%) of polyisoprene n-dodecane C12H26 112-40-3... [Pg.341]

Polymer (B) Characterization Solvent (A) ethylene/propylene copolymer M /kg.mor = 0.78,M ,/kg.mor = 0.79, 50 mol% propene, alternating ethylene/propylene units from complete hydrogenation of polyisoprene 1-butene C4H8 1992CH1 106-98-9... [Pg.266]

The third class of olefin methathesis in Scheme 21.1 is addition metathesis polymerization (ADMET). This reaction is an alternative method to stitch together olefins into polymers, in this case by a combination of dienes with extrusion of ethylene. Control of molecular weight by the ADMET process is less precise than that by ROMP, but this reaction has been used to make polymers with precise architectures, such as polymers that would be perfectly alternating ethylene-propylene copolymers. ... [Pg.1017]

Two metallocene catalysts for the formation of alternating ethylene-propylene copolymers. [Pg.1068]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...