Polyhydroxyalkanoates (PHAs) are a class of biodegradable polymers which can be produced via bacterial synthesis. They have garnered interest due to their potential as a biodegradable alternative to petroleum-based plastics. PHA molecules have been shown to have a helical morphology, which organize into spherulitic crystal structures. The most common, naturally occurring PHA, poly(3-hydroxybutyrate) (PHB), typically has a crystallinity of up to 75-85% in its homopolymer form. The resulting material is thus brittle and has a narrow processing window. However, a broad range of mechanical properties has been achieved with the inclusion of varying quantities of 3-hydroxyhexanoate (HHx) units to form the polymer P(HB-co-HHx).
Polyhydroxyalkanoates (PHAs) are a class of biopolymers capable of which can be produced through bacterial synthesis. Many PHAs have mechanical properties similar to those found in commonly used petroleum- based plastics and, as a result, have garnered interest as a potential as a more sustainable alternative to these materials. While PHAs are biodegradable, current techniques for large-scale biosynthesis require the use of large quantities of organic solvents that do not readily degrade in water and soil. As a result, the production process may incur additional environmental impacts, despite the use of more sustainable raw materials. Thus, recycling may further reduce the impact in the production and processing of PHAs.