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- Organometallic Initiators for Controlled Polymerization Reactions
Increasing ethylene pressure does not influence greatly the rate of polymerization. However, the ratio of the two monomers inserted into the chain changes, with ethylene being preferred at higher pressures. Thus, a simple pressure jump enables a change of the polymer structure to one which is predominantly ethylene. The result is that the polymer architecture can be approximated by two segments, one which is amorphous with a high functionality content and a second, which is primarily crystalline polyethylene. TEM analysis shows that these two segments phase separate, in a manner analogous to standard block-copolymers.
Lamellar Morphology |
