Continued from Properties of PBS

You can also download the final report (PDF document, 30 pages in total).

Recommendations for future research on PBS

Recommendations to biotechnology industry

  • Enlarge the uses of succinic acid will help the development of high scale production;
  • Improve the succinic acid monomer recovery step is an essential point both for environmental and economic considerations;
  • Interesting routes should be developed considering a direct biosynthesis of butanediol.

Recommendations to polymer industry

  • Enlarge the uses of PBS should help the development of high scale production lines;
  • Diversify the factory productions;
  • Consider the option of a two-step production, by melt condensation followed by SSP;
  • Decrease the sensitivity to hydrolysis of PBS;
  • Develop the benchmarking of PBS.

Recommendations to compounding and additive industries

  • Commercially develop different blends and compounds;
  • Develop a better control of the stabilization of PBS by the commercialization of appropriate grades.

Recommendations to plastic converters

  • Do a careful selection of PBS properties on the basis developed in the Guidelines for PBS material flexible processing;
  • Consider the quality control of the material regarding its degradation states.

Recommendations to coating industry

  • Improve gas barrier properties with water based and mineral coatings;
  • Test the use of mineral layer directly in contact with food product, it should reduce the migration.

Recommendations to end users

  • Follow the four main factors guiding the selection of a PBS packaging:
    • Barrier specifications;
    • Migration properties;
    • Cost of PBS packaging;
    • Concept of a self-life for a packaging;
  • The development of PBS for food packaging applications is predicted to start with film packaged foodstuffs, stored in cold conditions, with shelf life less than 2 months.

Recommendations to recycling industry

  • Pay attention to the different elements making particular the development of recycling processes for PBS;
  • Three routes are advised in specific cases:
    • Total depolymerisation;
    • Conversion into oligomers;
    • Direct conversion of the degraded polymer into a repaired grade.

Recommendation to DG SANCO

  • Implement an alternative route for the migration testing of materials sensible to hydrolytic degradation.

Recommendations for future research investigations

  • The stabilization of soft polyesters to hydrolysis, by efficient/safe by design additives (physic chemical and toxicological approaches);
  • Organic and mineral functional barriers to reduce the migration of highly interacting materials such as soft polyesters;
  • The hydrolysis properties of PBS as an opportunity for a fine controlled release for active packaging applications;
  • The optimization of SSP process on low melting temperature polymers;
  • Repairing of objects by SSP / recrystallization (cf PBS melting temperature increases of more than 10°C);
  • Agricultural mulch film applications of recycled PBS and soft polyesters.

Previous: Properties of PBS



This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement No.289196
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