Enhanced interfacial interaction by grafting carboxylated‐macromolecular chains on nanodiamond surfaces for epoxy‐based thermosets

Abstract

A novel core‐shell‐structured carboxylated‐styrene butadiene rubber (XSBR)‐functionalized nanodiamond (ND‐XSBR) was synthesized and characterized. Epoxy (EP) nanocomposites toughened by pristine ND and ND‐XSBR were investigated and compared. The ND‐XSBR‐reinforced nanocomposite exhibited mechanical properties superior to those of the one filled by pristine ND. At a low‐filler loading, the ND‐XSBR exhibited an impressive toughening effect. The maximum flexural strength was shown when the filler loading was as low as 0.1 wt % for the EP/ND‐XSBR nanocomposite. Furthermore, enhanced fracture toughness and fracture energy were shown by surface functionalization, representing enhanced compatibility between the ND‐XSBR and EP matrix. The glass transition temperature (Tg) and storage modulus of the nanocomposites were studied, and the EP/ND‐XSBR0.1 nanocomposite exhibited the highest Tg owing to the stronger interfacial interaction. The EP/ND‐XSBR0.2 exhibited higher storage modulus and Tg than the EP/ND0.2, because the higher interfacial interaction can restrict the molecular mobility of the EP by the functionalized ND‐XSBR. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 1890–1898

Influence of the hybrid materials based on carbon nanotubes and tannic acid on the rheological, thermal and mechanical performances of nitrile butadiene rubber composites

“…Considering the relatively low density, exceptional thermal, mechanical and electrical properties, carbon nanotubes (CNT) are the ideal candidates for the ultimate reinforcements in elastomer composites . Importantly, the dispersion and interfacial interactions between the filler and matrix were proved to be a critical issue to achieve optimal performances of the polymer composites . Unfortunately, the reinforcing effect of CNT has been limited due to the difficulties associated with homogeneous dispersion in the matrix and the lack of interfacial interaction between CNTs and polymer matrix .…”

“…[22] Importantly, the dispersion and interfacial interactions between the filler and matrix were proved to be a critical issue to achieve optimal performances of the polymer composites. [23,24] Unfortunately, the reinforcing effect of CNT has been limited due to the difficulties associated with homogeneous dispersion in the matrix and the lack of interfacial interaction between CNTs and polymer matrix. [25] In general, using organic-modifiers or silane coupling agents to modification the inorganic filler is the most common method to improve mechanical properties of rubber composites.…”

Automated 3D assembly of periodic alumina‐epoxy composite structures

“…This was successfully demonstrated in ice‐templated alumina/PMMA composites . Epoxy matrix‐composites loaded with only small amounts (0.1 ‐ 0.3 wt%) of various inorganic nanoparticles like boron nitride and diamond showed superior mechanical properties compared to pure epoxy . In contrast, highly filled alumina‐epoxy composites were fabricated by 2D and 3D periodic arrangements of submillimeter sized building blocks by vibration assisted self‐assembly technique .…”

“…13 Epoxy matrix-composites loaded with only small amounts (0.1 -0.3 wt%) of various inorganic nanoparticles like boron nitride and diamond showed superior mechanical properties compared to pure epoxy. 14,15 In contrast, highly filled alumina-epoxy composites were fabricated by 2D and 3D periodic arrangements of submillimeter sized building blocks by vibration assisted self-assembly technique. 16 The corresponding soft epoxy-ceramic composite (by infiltration) induced hydrostatic stresses at the ceramic-polymer interface due to a thermal expansion coefficient mismatch, confirmed by photoelastic measurements and FE calculations.…”

Correlation of the morphology and thermooxidative degradation behavior of poly(ethylene terephthalate)–nitrile butadiene rubber–polycarbonate ternary blends

“…Indeed, it is significant to add a third component to eradicate these defects. The correlation of the morphology with the thermal and thermooxidation degradation behavior of polymer blends has not been efficiently studied . Moreover, it is crucial to determine the correlation between bottlenecks and key questions of the blending process.…”