engleski

Razmakne skupine u strukturi makromolekula

Spacer groups are often an essential part of polymer structures, particularly functional polymers. Many physical, chemical and biological properties depend strongly on their size. They provide flexibility and fabricability in highly rigid polymers. They also provide accessibility of functional groups, crystallization of side chains, separation of groups from the main chain for efficient chemical reactions and other characteristics. They can be found in natural polymers where flexible spacer groups provide essential links for the stability of polypeptide structures. In our research work we have studied the effects of flexible side chains for side chain crystallization and flexible side groups for reactivity on synthetic polymers, particularly, polyaldehydes, polyolefins, poly(ethylene oxides), poly(ω-alkenoic acid esters) and poly(alkyl methacrylates). Ultimately, we have shown some interest in how flexible links behave because of their oligomeric nature. The importance of short spacer groups on the crystallization of stereoregular polymers could possibly influence the stereospecificity of the addition to the catalyst site, for example, in propylene polymerization. In this paper we are trying to show, on a few demonstrative examples, the importance of spacer groups in macromolecular structures.

functional polymers; polyaldehides; poly(alkyl methacrylates); poly(ethylene oxides); polymer structure; polyolefins; poly(omega-alkenoic acid esters); spacer groups

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