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Mousa, Maryam ; Jonsson, Magnus ; Wilson, Olivia , et al. Polym. Chem.,2023,14(47):5154-5165. DOI: 10.1039/d3py00630a
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Abstract: Herein, we report a new synthetic route to the cyclic ketene acetal, 2-methylene-4-methyl-1,3-dioxepane (Me-MDO) as a way to expand the tool box of synthesis procedures for cyclic ketene acetals and actualize them as realistic alternatives for synthesizing biodegradable polymers. In this work, 2-methylene-1,3-dioxepane (MDO) and Me-MDO were polymerized by radical ring-opening polymerization to synthesize degradable polyesters. NMR and SEC were used to monitor the polymerization while DSC was used to study the thermal properties. Poly(2-methylene-1,3-dioxepane) (PMDO) showed increased degree of branching with higher conversion, subsequently decreasing crystallinity. The effect of branching and the introduction of side-groups on the chem. hydrolysis rate and biodegradability of the polyesters was assessed using a chem. hydrolysis test and the OECD 301D ready biodegradability screening test, resp. A significant reduction in the chem. hydrolysis rate and biodegradability was observed upon the introduction of a side group in the poly(2-methylene-4-methyl-1,3-dioxepane) (PMe-MDO) polyester. Less obvious effects on the hydrolysis rate and biodegradability were observed as a result of the polyester branching.
Purchased from AmBeed: 69814-56-8 ; 626-95-9
CAS No. : | 626-95-9 | MDL No. : | MFCD00004560 |
Formula : | C5H12O2 | Boiling Point : | No data available |
Linear Structure Formula : | HO(CH2)3CH(OH)CH3 | InChI Key : | GLOBUAZSRIOKLN-UHFFFAOYSA-N |
M.W : | 104.15 | Pubchem ID : | 79083 |
Synonyms : |
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Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
GHS Pictogram: |