To predict the lifetime of polymers, it is necessary to identify structure-property relationships of the materials as they undergo a process of majority chain scission. In particular it is crucial to identify new macromolecular criteria governing the experimentally observed embrittlement using a multi-scale approach. This involves detailed characterization of the microstructure (using XR measurements) alongside a relevant characterization of the mechanical behaviour at fracture.
The objective of this internship is to characterize and understand the impact of aging on the microstructures of polymers using X-ray techniques. The study will first involve conducting SAXS and WAXS tests on aged samples, focusing on two types of polymers: polyurethanes and a biodegradable polymer (polybutylene succinate). In the second phase, the microstructural changes will be correlated with variations in mechanical behavior to better understand the origin of embrittlement during aging.