Polymerization of cystine-derived monomers
| Autor: | Andreas Hess, Helmut Schlaad, Bernd Schmidt, Max Lehmann, Felix N. Behrendt |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Olefin fiber Molar mass Polymers and Plastics Diene Organic Chemistry Bioengineering 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Grubbs' catalyst chemistry.chemical_compound Photopolymer Monomer chemistry Polymerization ddc:540 Polymer chemistry Institut für Chemie 0210 nano-technology |
| Zdroj: | Polymer Chemistry. 10:1636-1641 |
| ISSN: | 1759-9962 1759-9954 |
| DOI: | 10.1039/c9py00118b |
| Popis: | Cystine was used as a platform chemical to prepare cyclic and acyclic monomers for entropy-driven ringopening polymerization (ED-ROMP) via olefin or disulfide metathesis and for step-growth polymerization. The olefin ED-ROMP of an olefin/disulfide containing 16-atom macrocycle using the 3rd generation Grubbs catalyst was examined in greater detail. Kinetic studies revealed that the catalyst turned inactive during the polymerization, which limited the achievable (apparent) polymer molar mass to similar to 70 kg mol(-1). Such limitation could be overcome with the disulfide ED-ROMP of the same macrocycle to yield polymers with molar masses of up to 180 kg mol(-1). The step-growth polymerizations of acyclic diene and dithiol monomers via olefin metathesis or oxidation were far less effective and yielded just low molar mass polymers or oligomers; photopolymerization of a thiol-ene monomer produced a polyester with a molar mass of 35 kg mol(-1). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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