POSS nanoparticles as a potential compatibilizer for natural rubber/butadiene rubber blends

Abstract

In this study, it was aimed to investigate octavinyl‐polyhedral oligomeric silsesquioxane (OV‐POSS) incorporation into natural rubber (NR)/butadiene rubber (BR) elastomer blends as a potential compatibilizer. The effects of OV‐POSS loading levels on the thermal, mechanical, morphological, and dynamic‐mechanical properties of elastomer blends were explored. Fourier‐Transform Infrared Spectrometer (FTIR), Temperature Scanning Stress Relaxation (TSSR), and Differential Scanning Calorimetry (DSC) results revealed the conceivable effect of OV‐POSS nanoparticles in the vulcanization through reacting with sulfur and/or elastomers. Scanning Electron Microscope (SEM), X‐Ray Diffraction (XRD), and tensile test measurements supported the improvement of mechanical properties due to homogeneous dispersion at low loading levels. On the other hand, high amount of OV‐POSS incorporation (7 and 10 phr) resulted in a decrease in mechanical properties, owing to the agglomeration of nanoparticles. According to contact angle and Dynamic mechanical analysis (DMA) results, it could be concluded that OV‐POSS nanoparticles were localized at the interface of the elastomers and enabled the compatibilization of immiscible NR/BR blends.

Thermal and mechanical properties of PLA/ENR thermoplastic vulcanizates compatibilized with tetrafunctional double-decker silsesquioxanes

“…It can, therefore, be concluded that the incorporation of DDSQ-eter-4OH limited the molecular mobility around the glass transition temperature [59]. This effect may be caused by the increase in cross-linking of the ENR chains because of the introduction of additional reactive groups with the compatibilizer, which may indicate its incorporation into the structure of cross-linked rubber [41,42,54].…”

“…Typically, POSS particles measure between 0.6 and 1.2 nanometers in diameter and may contain certain functional groups [36]. There are considerable reports on the use of POSS molecules to function as a coagent [36] or compatibilizer [37][38][39][40][41][42] and improve thermal resistance [43,44] mechanical properties [45] and flame retardancy [46,47] of resulting hybrid materials. However, the usage of POSS as a compatibilizer is particularly interesting.…”

“…The research also examined the transport properties of POSS/NR composites using different forms of POSS, and it was determined that the inclusion of POSS enhanced the resistance of the NR matrix to solvents [48]. Kalkan et al [41] investigated octavinyl silsesquioxanes (OV-POSS) incorporation into natural rubber (NR)/butadiene rubber (BR) elastomer blends as a potential compatibilizer. Additionally, Kilic et al [42] used epoxidized polyhedral oligomeric silsesquioxanes (epoxy-POSS) as a successful compatibilizer in poly(lactic acid) (PLA)/poly(butylene adipate-co-terephthalate) (PBAT) blends.…”

Partial Replacement of Carbon Black with Graphene in Tire Compounds: Transport Properties, Thermal Stability and Dynamic Mechanical Analysis

“…It was concluded that irrespective of the blend formulations, CB is more partitioned to the minor phase, that is, BR. In another study, octa vinyl-polyhedral oligomeric silsesquioxane (OV-POSS) was used as a compatibilizer for NR/BR blends [35]. DMA and contact angle studies indicated that the nanoparticles were located at the interface of the elastomers and contributed to improvements in the properties up to a certain loading.…”