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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    "description": "<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>", 
    "language": "eng", 
    "title": "Enzymatic degradation of a commercial bio-based polyester and evaluation of the mechanism involved", 
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        "program": "H2020", 
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    "publication_date": "2020-11-30", 
    "creators": [
      {
        "orcid": "0000-0002-9479-7844", 
        "affiliation": "University of Bologna", 
        "name": "Romano Angela"
      }, 
      {
        "affiliation": "University of Bologna", 
        "name": "Rosato Antonella"
      }, 
      {
        "orcid": "0000-0002-7388-8894", 
        "affiliation": "University of Bologna", 
        "name": "Totaro Grazia"
      }, 
      {
        "orcid": "0000-0002-5974-1642", 
        "affiliation": "University of Bologna", 
        "name": "Celli Annamaria"
      }, 
      {
        "orcid": "0000-0001-8015-8665", 
        "affiliation": "University of Bologna", 
        "name": "Zanaroli Giulio"
      }, 
      {
        "orcid": "0000-0003-4445-3880", 
        "affiliation": "University of Bologna", 
        "name": "Sisti Laura"
      }
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    "meeting": {
      "acronym": "EUBP", 
      "url": "https://www.european-bioplastics.org/events/eubp-conference/", 
      "dates": "30 November - 03 December 2020", 
      "place": "Remote (digital platform Edition)", 
      "title": "15th European Bioplastics Conference"
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