Decoding Structure–Property Relationships in Biodegradable Polymers Using In Situ WAXS and Tensile Measurements

Redesigned biodegradable polymers present promising alternatives to conventional petroleum-based plastics. However, optimizing their mechanical properties requires a deeper understanding of the complex relationship between molecular structure and macroscopic properties.

In this talk, we explore mechanistic insights into the mechanical deformation of semicrystalline bio-based polyesters, utilizing in situ Wide-Angle X-ray Scattering (WAXS) and uniaxial tensile measurement. Our approach enables the probing of multiscale structural changes in redesigned polymers during mechanical loading. Specifically, we discuss how crystalline and amorphous domains respond during elastic deformation, yielding, necking, and strain-hardening regimes, as well as the impact of processing conditions on molecular orientation and mechanical performance. Our findings establish structure–property relationships that inform molecular design and processing pathways for next‑generation biodegradable polymers with improved mechanical performance for various applications.