Effect of Octavinyl-Polyhedral Oligomeric Silsesquioxane on the Cross-linking, Cure Kinetics, and Adhesion Properties of Natural Rubber/Textile Cord Composites

Abstract

The effect of octavinyl-polyhedral oligomeric silsesquioxane (OV-POSS) on the cross-linking, cure kinetics, and adhesion properties of natural rubber (NR)/textile cord (aramid, nylon 6.6, and polyester) composites was investigated in this study. OV-POSS could directly accompany the vulcanization reaction, thanks to its multiple vinyl groups. It was observed that incorporation of OV-POSS into the reference NR compound (REF) delayed the curing time and reduced the cross-linking density. Thermal gravimetric analysis revealed that OV-POSS improved the thermal stability of NR. NR/OV-POSS composites including 1 and 3 phr OV-POSS exhibited similar elongation at break and tensile strength values as compared to the REF compound. Adhesion characteristics of the compounds have been investigated in terms of strip H-adhesion test, and thermodynamic energy of adhesion was determined by contact angle measurements. It was observed that the addition of OV-POSS to the NR compound improved the interfacial adhesion significantly between NR and aramid and NR and nylon 6,6 fibers.

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

“…These precursors are polysulfidic pendant groups connected to the OV‐POSS chain. This reaction can take place with three possible mechanisms to form three different products in Figure 10B 35 (a) Leaving of H* to form a double bond (b) Attack of sulfurating radical to CH* radical and additionally polysulfide ring formation by the neighbor sulfur atoms (c) reaction of more sulfurating species with CH* radical on the OV‐POSS chain to induce an improvement in its cross‐link ability.…”

“…Vulcanization system species A, Formation of sulfurating species B, Possible crosslink precursors of OV‐POSS 35 C, Elastomers (Reactive sites of all species in the system are designated with red arrows) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Highly Interfacial Adhesion and Mechanism of Nylon-66/Rubber Composites by Designing Low-Toxic RF-like Dipping Systems

“…To improve the interfacial adhesion between the fiber skeleton and rubber matrix, there are many methods to modify the surface of fiber materials, such as ultraviolet (UV)-initiated grafting, − chemical grafting, − plasma treatment, − electron beam irradiation, , ultrasonic treatment, γ-ray radiation, , and interfacial enhancement . The addition of the filler in rubber to promote the interfacial adhesion of fiber-reinforced rubber composites, such as addition of POSS particles, is also an important research direction in the field of composite materials. , However, physical treatment methods such as plasma treatment and radiation treatment are expensive and require complex conditions . In addition, the traditional chemical treatment methods, such as chemical grafting and UV-initiated grafting, not only achieve effective bonding, but also damage the structure of fiber materials to a certain extent .…”

“…22 The addition of the filler in rubber to promote the interfacial adhesion of fiber-reinforced rubber composites, such as addition of POSS particles, is also an important research direction in the field of composite materials. 23,24 However, physical treatment methods such as plasma treatment and radiation treatment are expensive and require complex conditions. 25 In addition, the traditional chemical treatment methods, such as chemical grafting and UV-initiated grafting, not only achieve effective bonding, but also damage the structure of fiber materials to a certain extent.…”

Polypropylene/Lignin/POSS Nanocomposites: Thermal and Wettability Properties, Application in Water Remediation

“…Furthermore, OV-POSS contains a common nontoxic compatibilizer with the smallest, 1–3 nm, molecular silica [ 36 , 37 ] that can be effectively incorporated into polymers, such as polypropylene, polyethylene terephthalate, and polyester, using copolymerization, grafting, or simply traditional blend methods [ 38 , 39 , 40 ]. There is a very limited number of published studies on OV-POSS used as an agent with polypropylene and lignin.…”