Olefin Metatez Tepkimeleri ile Norbornen İçeren Fonksiyonel Poliesterlerin Modifikasyonu

Bu çalışmada doymamış fonksiyonel poliester türevleri 5-norbornen-2,3-dikarboksilik anhidrit ve 1,6-hekzandiol bileşiklerinin polikondenzasyon tepkimeleri ile elde edilmiştir. Fonksiyonel doymamış poliesterler metil akrilat kullanılarak halka açılma/çapraz metatez tepkimeleri ile modifiye edilmiştir. Poliesterlerin çözü- nürlük ve hidrofobik/hidrofilik karakterleri halka açılma/çapraz metatez tepkimeleri ile alil son grubuna sahip poli(etilenglikol) bileşikleri entegre edilerek değiştirilmiştir. Doymamış poliesterlerdeki norbornen grubu sayesinde jel benzeri malzemeler, Grubbs birinci, üçüncü ve Hoveyda-Grubbs ikinci nesil katalizörleri varlığında halka açılım metatez polimerizasyon tepkimeleri ile ana poliester zinciri üzerinde yan poli(norbornen) zincirlerinin oluşumu ile elde edilmiştir.

Modification of Functional Polyesters Bearing Norbornene Moieties via Olefin Metathesis Reactions

In this study, unsaturated functional polyester derivatives were synthesized via polycondensation reactions of 5-norbornene-2,3-dicarboxylic anhydride and 1,6-hexanediol. Functional unsaturated polyesters were modified using methyl acrylate as ring opening/cross-metathesis reaction partner. The solubility and hydrophobic/hydrophilic character of polyester was tuned by integrating allyl end capped poly(ethyleneglycol) by ring opening/cross-metathesis reactions. Norbornene moiety of unsaturated polyesters allowed us to use ring opening metathesis polymerization reactions to form side-chain poly(norbornene) on main polyester chain using Grubbs 1st, 3rd and Hoveyda-Grubbs 2nd generation catalysts as initiators, resulting in gel-like materials.

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