Polyolefins side chain functional groups

Polyolefins with Side Chain Functional Groups... 

A comonomer that contains a reactive group should exhibit three essential properties (1) good stability with metallocene catalyst, (2) good solubihty with the reaction media, and (3) facile interconversion of reactive group into functional (polar) groups, such as OH and NH2 groups, after polymerization [3, 34]. In previous years, we had identified three suitable reactive comonomers, i.e., borane monomer, p-methylstyrene (p-MS), and divinylbenzene (DVB), as illustrated in Scheme 1. In concert with the selected metallocene catalysts, the copolymerization reactions take place to form well-controlled reactive polyolefin copolymers with various reactive sites in the side chains. Subsequently, the incorporated reactive... 

A solution to the steric bulk of the macromonomers is grafting from where polymerizations occur from the functionalized side chains of the ROMP-generated backbone. The copolymerization of propylene with 4mol% GOD yielded terminal vinyl groups off the main polymer chain resulting from the addition of the GOD. Attachment of the catalyst at the vinyl group via olefin metathesis enabled ROMP of nor-bomene derivatives from the polyolefin backbone.In a grafting from approach, norbornene monomers with covalently attached ATRP initiators were copolymerized with ester-functionalized norbomenes to form the polymeric backbone. The ATRP of acrylic acid successfully yielded the brush polymer. 

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