A process of forming a functionalized polyhydroxyalkanoate (PHA) material includes forming a saturated PHA material via a bacterial fermentation process. The process further includes performing an oxide elimination reaction on the saturated PHA material to form an unsaturated PHA material having a carbon-carbon double bond in a polymer backbone. The process also includes utilizing the unsaturated PHA material to form an epoxidized PHA material. The process further includes utilizing the epoxidized PHA material to form a functionalized PHA material. The functionalized PHA material has one or more cross-linkable functional groups bonded to a polymer backbone of the functionalized PHA material.