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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Bih, L. |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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Comerford, James William
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2020Effects of Methyl Branching on the Properties and Performance of Furandioate-Adipate Copolyesters of Bio-Based Secondary Diolscitations
- 2019Improving the Post-Polymerisation Modification of Bio-based Itaconate Unsaturated Polyesters: Catalysing Aza-Michael Additions with Reusable Iodine on Acidic Aluminacitations
- 2019Improving the Post-polymerization Modification of Bio-Based Itaconate Unsaturated Polyesters: Catalyzing Aza-Michael Additions With Reusable Iodine on Acidic Aluminacitations
- 2018Post-polymerization modification of bio-based polymerscitations
- 2018Elucidating enzymatic polymerisationscitations
- 2017New bio-based monomers::Tuneable polyester properties using branched diols from biomasscitations
- 2017New bio-based monomers:citations
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article
Elucidating enzymatic polymerisations
Abstract
<p>The sustainable synthesis of polymers is a field with growing interest due to the need of modern society to preserve the environment whilst making used products and food sustainable for the future generations. In this work we investigate the possibility of synthesizing aliphatic polyesters derived from various dicarboxylic acid diesters and diols in a solvent-free reaction system. Candida antarctica lipase B was selected as biocatalyst and its selectivity towards the carbon and ester chain length were elucidated. The selected enzyme was able to synthesize various polyesters combining C<sub>4</sub>-C<sub>10</sub> diesters and C<sub>4</sub>-C<sub>8</sub> diols. All combinations led to monomer conversions above 90% in 24 h with the best number average molecular weights (M<sub>n</sub>) being obtained through the combination of dimethyl adipate and 1,8-octanediol leading to a M<sub>n</sub> of 7141 Da. Differential scanning calorimetry analysis shows a clear trend with an increase in melting temperature of the polymers that correlates with both the increase of the M<sub>n</sub> or of the polymer's constitutional repeat unit carbon chain length. Thermogravimetric analysis and rheology measurements performed on selected samples also confirm the trend showing a variation of the polymer's degradation temperatures and viscosity profiles.</p>