Strain-induced crystallization in reinforced natural rubber: investigating the role of carbon nanofillers

Natural rubber (NR) is widely used in high-performance applications due to its exceptional elasticity and durability. A key factor behind NR’s outstanding mechanical properties is strain-induced crystallization (SIC), which enhances its resilience and tensile strength. The addition of fillers like graphene oxide, reduced graphene oxide, and carbon black can further improve SIC, making NR composites even stronger. However, the exact molecular mechanisms driving this enhancement remain poorly understood. To shed light on this fundamental issue, we propose an insitu (U)SAXS/WAXS investigation on stretched NR films. Time-resolved WAXS data will enable us to track the formation, orientation, and growth of NR crystallites under strain. Simultaneously, (U)SAXS measurements will provide insights into nanofiller ordering at different length scales. Specifically, we will examine how different types of filler, their quantity, and nanoscale order impact SIC and NR mechanical properties.