PLA Block Polymers: Versatile Materials for a Sustainable Future

Block polymers present an almost endless realm of possibilities to develop functional materials for myriad applications. The established self-assembly of block polymers allows researchers to access properties that are inaccessible in homopolymers. However, there is a need to develop more sustainable options than the current commodity block polymers. Derived from renewable resources and industrially compostable, poly(lactide) (PLA) is at the forefront of technological advancements in sustainable block polymers. Its material properties including high stiffness, relatively high glass transition temperature, and semicrystallinity in isotactic versions lend themselves to many applications, and its ease of synthesis provides a well-established platform for developing high-performance materials. This Perspective highlights recent advancements associated with PLA-containing block polymers, including their syntheses, mesostructural considerations, and mechanical properties, from resilient elastomers to tough plastics. We also give our perspective on the subfield of PLA block polymers, our outlook on the future, and our assessment of exciting developments yet to come.