Poster Open Access

Enzymatic degradation of a commercial bio-based polyester and evaluation of the mechanism involved

Romano Angela; Rosato Antonella; Totaro Grazia; Celli Annamaria; Zanaroli Giulio; Sisti Laura


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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.4327388", 
  "language": "eng", 
  "title": "Enzymatic degradation of a commercial bio-based polyester and evaluation of the mechanism involved", 
  "issued": {
    "date-parts": [
      [
        2020, 
        11, 
        30
      ]
    ]
  }, 
  "abstract": "<p>Aliphatic polyesters are the most promising biodegradable plastics because of their high susceptibility to the attack of hydrolytic<br>\nenzymes and of many microorganisms naturally occurring in the environment. Poly(butylene succinate-<em>co</em>-adipate) (PBSA) is a biobased semicrystalline copolymer of poly(butylene succinate) (PBS), with adipic acid as co-monomer. It is highly biodegradable<br>\nbecause of its lower crystallinity and higher flexibility of polymer chains compared to PBS. In the present study, the&nbsp;biodegradability mechanism of PBSA was evaluated using cutinase from <em>Humicola insolens</em>, which is a commercial hydrolytic enzyme presenting both lipase and esterase features. The polyester&nbsp;degradation is based on weight loss measurements&nbsp;combined to other analyses (i.e., GPC, <sup>1</sup>H NMR, and DSC) performed on the residual solids of PBSA&nbsp;films, in order to understand the molecular and chemical modifications induced at the surface and/or in the bulk of polymer materials over time. The results showed that the enzymatic degradation mechanism of cutinase proceed&nbsp;by degrading the polymer from the surface of the film. An exo-type cleaving action mode was proposed based on the identification of the oligomers and monomers released as degradation products.</p>", 
  "author": [
    {
      "family": "Romano Angela"
    }, 
    {
      "family": "Rosato Antonella"
    }, 
    {
      "family": "Totaro Grazia"
    }, 
    {
      "family": "Celli Annamaria"
    }, 
    {
      "family": "Zanaroli Giulio"
    }, 
    {
      "family": "Sisti Laura"
    }
  ], 
  "id": "4327388", 
  "event-place": "Remote (digital platform Edition)", 
  "type": "graphic", 
  "event": "15th European Bioplastics Conference (EUBP)"
}
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