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Designed enzymatically degradable amphiphilic conetworks by radical ring-opening polymerization

Titelangaben

Shi, Yinfeng ; Schmalz, Holger ; Agarwal, Seema:
Designed enzymatically degradable amphiphilic conetworks by radical ring-opening polymerization.
In: Polymer Chemistry. Bd. 6 (2015) Heft 35 . - S. 6409-6415.
ISSN 1759-9954
DOI: https://doi.org/10.1039/c5py00962f

Angaben zu Projekten

Projektfinanzierung: Deutsche Forschungsgemeinschaft

Abstract

A new route for the preparation of enzymatically degradable amphiphilic conetworks (APCNs) based on unsaturated polyesters by radical ring-opening copolymerization of vinylcyclopropane (VCP) with cyclic ketene acetal (CKA) is presented in this article. In the first step, the unsaturated biodegradable polyesters with random distribution of cross-linkable double bonds and degradable ester units were prepared by radical ring-opening copolymerization of VCP and CKA such as 2-methylene-4-phenyl-1,3-dioxolane (MPDO). Very similar reactivity ratios (rVCP = 0.23 ± 0.08 and rMPDO = 0.18 ± 0.02), unimodal gel permeation chromatography (GPC) curves and 2D NMR technique (heteronuclear multiple bond correlation, HMBC) showed the formation of random copolymers with unsaturation and ester units. The unsaturated units were used for cross-linking by radical polymerization with a hydrophilic macromonomer (oligo(ethylene glycol) methacrylate, OEGMA) in a second step for the formation of enzymatically degradable amphiphilic conetworks (APCNs). Enzymatic degradability was studied using Lipase from Pseudomonas cepacia. Due to the hydrophilic (HI) and hydrophobic (HO) microphase separation, the APCNs showed swelling in both water and organic solvents with different optical properties. The method provides an interesting route for making functional biodegradable APCNs using radical chemistry in the future by choosing appropriate vinyl comonomers.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Kolloide und Grenzflächen - BZKG
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 12 Dec 2019 08:28
Letzte Änderung: 12 Dec 2019 08:28
URI: https://eref.uni-bayreuth.de/id/eprint/53564