Date

Friday 27 Mar 2026

Time

15:15 - 15:45

Location

BW006

Supervisor

Dennis Hetterscheid

Jury

Irene Groot

Polyactic acid (PLA) is widely promoted as a green alternative to conventional polymers such as polyethylene (PE). There is however a discrepancy between the labelling of PLA as ”sustainable and biodegradable”, and the reality of its production and degradation. This review provides a holistic evaluation PLAs usefulness for combating marine plastic pollution through analyzing its production processes, polymer performance and degradation. It was found that the use of organic solvents and high energy demands of the conventional production routes limit PLAs sustainability. Currently, large scale production of PLA is inhibited by its high production costs, although this could change through the employment of new (enzymatic) synthesis routes. Moreover, although PLAs mechanical properties are adequate for many applications and are being improved upon, its lack of degradation in the natural environment is concerning. PLA is not degradable in terrestial or marine environments in reasonable timelines and holds the potential to leech toxic oligomers and form persistent microplastics. In order to improve sustainability, reduce cost and ensure environmental degradation, more research and major revisions are needed.