Abstract
This contribution presents an updated overview of the different copolymers containing stereoregular polystyrene blocks. Special emphasis is placed on syndiospecific and isospecific copolymerization of styrene with co-monomers (ethylene and α-olefins, conjugated and non-conjugated dienes, styrene derivatives, etc.). The catalytic systems involved are described and the polymerization mechanisms are discussed. Alternative approaches (simultaneous, living, chain-transfer and graft copolymerization) and the resulting detailed structures and characteristics of the copolymers are also reported.
Highlights
Production of plastic materials is one of the most important processes of the contemporary chemical industry and represents an ever-increasing market
In this contribution we present an an updated updated overview overview of of the the different different copolymers copolymers containing containing stereoregular polystyrene sequences
Styrene-α-olefin copolymerization had widely been reviewed in a previous paper, so so the following section is focused on recent progress in this field
Summary
Production of plastic materials is one of the most important processes of the contemporary chemical industry (some 322 million tons of plastic materials were produced in 2015) and represents an ever-increasing market. Copolymerization of two (or more) monomers is one of the ways to create new materials, as copolymers have unique properties different from those of the corresponding homopolymers. The copolymerization process is often a better alternative than blending the two homopolymers, generally difficult to obtain, and requiring the use of compatibilizers, especially if the two polymers are chemically different. Isotactic polystyrene (iPS), discovered by Natta before sPS, has been less studied due to its low crystallization rate [11,12,13,14]. SPS modification, including syndiospecific stereoregular polystyrene sequences. [24,25]; the the present present review review includes includes iPS iPS copolymers copolymers and and recent recent progress concerning the synthesis of stereoregular polystyrene copolymers. Different approaches progress concerning the synthesis of stereoregular polystyrene copolymers.
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