Coordination polymerization terms Links

Polymers are macromolecules which are composed of smaller molecules linked by covalent bonds. In terms of the reaction kinetics, polymerizations are traditionally classified into several categories stepwise polymerization, free-radical polymerization, ionic polymerization, ring-open polymerization, and coordination polymerization or polyinsertion. Each polymerization method has a combination of requirements for reaction conditions, and they exhibit certain types of product and process features (Caneba, 1992a, 1992b Odian, 1991). Even though in principle, the FRRPP process can be implemented with a wide variety of polymerization mechanisms, its discovery and immediate implementation has occurred in conjunction with free-radical kinetics. 

Emulsion droplets can also serve as soft templates to produce capsules. A range of cross-linking chemistries on the interface of oil-in-water emulsion droplets, whereby introducing various polymer functionalities in the resulting capsules has been employed. These are ring-opening metathesis polymerization [59], interfacial step-growth polymerization [60], metal coordination polymerization also termed miniemulsion periphery polymerization [61], surface-initiated miniemulsion ATRP [62, 63], and inverse miniemulsion periphery RAFT polymerization [64, 65]. 

The different behavior of the catalysts apparently arises from the nature of the transition metal of the catalyst. It seems reasonable to treat the mechanism of stereospecific olefin polymerization in terms of coordination ionic catalysts, regarding the valence state, coordination number, and nature of ligands of the transition metal as a matter of primary importance. In such an approach the polymerization mechanism is based on the character of metal—carbon bond by which a growing polymer chain is linked to the transition metal. 

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