A5033923814- biodegradable polymer synthesis and properties
- Advanced Polymer Synthesis and Characterization
- Carbon dioxide utilization in catalysis
- Synthetic Organic Chemistry Methods
- Microplastics and Plastic Pollution
- Polymer crystallization and properties
TU Dresden
2022-2024
Leibniz Institute of Polymer Research
2020-2024
Radical ring-opening polymerisation (RROP) of cyclic ketene acetals (CKAs) has gained momentum as it yields polyesters biodegradable polymers from a radical polymerisation. In order to advance the polymerisation, some its major limitations were addressed in research presented, focussing on four mainly used CKAs modern RROP. Monomer synthesis been updated towards cobalt/TMSCl-based system that was performed reliably several monomers at room temperature. Calculations using density functional...
Radical ring-opening polymerization (RROP) of 2-methylene-1,3-dioxepane (MDO) leads to a polymer that is structurally similar poly(ε-caprolactone) (PCL). Despite the similarities, polymerized MDO (PMDO) known exhibit little or no semicrystallinity, which often explained by branching PMDO caused free-radical polymerization. Branching in RROP can arise from intramolecular 1,7-H-transfer result short-chain intermolecular H-transfer, resulting long-chain branching. In this study, we performed...
A series of previously unreported amine-bearing cyclic ketene acetals (CKAs) furnished with different alkyl-substituents were prepared and polymerised into pH-responsive polyesters.
Abstract Radical ring‐opening polymerization (RROP) of cyclic ketene acetals allows for the synthesis functional and biodegradable polyesters. To gain a better understanding RROP, kinetic studies this reaction method are thus essential but still rare. In here we conducted experiments on RROP 2‐methylene‐1,3,6‐trioxocan (MTC) first time. line with earlier findings, behavior could be distributed into chain growth, stationary step growth probably caused by dominating branching recombination...
Radical ring opening polymerisation (RROP) of cyclic ketene acetals (CKAs) is an attractive technique to synthesize branched, (bio)degradable polyesters. However, CKAs as monomers RROP suffer from hydrolysis lability, making aqueous heterogeneous precipitation polymerisations challenging. In order explore the 2-methylene-1,3,6-trioxocane (MTC) and avoid monomer, kinetic studies in supercritical CO2 (scCO2) were performed. Tuning reaction pressure temperature allowed for synthesis varying...