High‐performance thermoplastic elastomers/carbon nanotubes nanocomposites: Mechanical behavior, rheology, and durability

Abstract

Advanced polystyrene-b-polybutadiene-b-polystyrene (SBS) based nanocomposites containing bare carbon nanotubes (CNTs) and CNTs bearing hydroxyl functional groups (CNTs-OH) have been formulated and fully characterized. In particular, the reinforcement effect of CNTs and CNTs-OH on SBS was deeply investigated through mechanical and dynamical thermo-mechanical analysis and the rheological response of SBS-based nanocomposites was investigated and discussed. The mechanical properties of SBS/CNTs and even more of SBS/CNTs-OH nanocomposites are substantially superior to those of neat SBS, due to the uniformly dispersed nanofillers throughout the polymeric matrix. The presence of -OH groups onto CNTs promotes the stress transfer from polymer to CNTs, strengthening the overall performance of the nanocomposite. Moreover, the durability of SBS-based nanocomposites was monitored through mechanical, dynamic mechanical, and rheological analysis. SBS-based nanocomposites showed a significant improved photo-stability with respect to the neat matrix, due to the presence of CNTs that are able to stabilize efficiently SBS because of their acceptor-like electron properties.

Nanofiller Dispersion, Morphology, Mechanical Behavior, and Electrical Properties of Nanostructured Styrene-Butadiene-Based Triblock Copolymer/CNT Composites

“…This can be attributed to the better dispersion and more homogeneous distribution of the CNTs due to the higher shear forces applied during melt mixing, which was indicated by the lower values of the agglomerate area ratio and their variations (Figure 10). Similar observations were made by Arrigo et al [55] in composites of SBS and modified MWCNTS containing COOH groups, which were melt mixed in a Brabender mixer at 50 rpm and 100 rpm. The study also reported a significant influence of processing temperature on the mechanical properties, an observation that could not be validated from the results obtained in the context of the present work.…”

Preparation and mechanical properties of water‐dispersible hyperbranched polymer grafted carbon black/natural rubber composites by latex blending method

“…In this way, the aggregation of filler will promote the formation of the internal stress concentration of composite, therefore, the ability of composites to resist external forces has been reduced. [53][54][55][56] In common, the mechanical properties of rubber-matrix composites depend on the dispersibility of filler and the interaction between filler and rubber-matrix. 53 The dispersibility and wettability of CB-g-CTHBP's in rubber-matrix demonstrate obvious improvement after grafted with hyperbranched polymer, and the interaction has also increased between the fillers and rubber-matrix.…”

Mechanical, rheological and thermal properties of montmorillonite-modified polyhydroxybutyrate composites

“…22 Arrigo et al also observed similar phenomenon. 23 The researchers reported that due to better interaction between the OH-modified CNTs and polystyrene- b -polybutadiene- b -polystyrene (SBS), the nanocomposites prepared using the treated CNT have higher viscosity and improved storage modulus.…”