The reinforcement of styrene butadiene rubber composites with simple environmentally friendly aramid fiber modification

Abstract

The surface treatment of aramid fiber (AF) improved the properties of reinforced composites. However, many AF modification methods were difficult to apply to the mass production of reinforced composites due to drawbacks, such as processes that were complex and not environmentally friendly. This paper described three simple and environmentally friendly methods for AF surface treatment and their effects on the properties of reinforced aramid fiber/carbon black/butadiene benzene ethylene rubber (AF/CB/SBR) composites. The AF was treated by thermal oxidation and coated with butadiene‐styrene‐pyridine rubber latex (VPL) or maleated polybutadiene liquid rubber. Then, AF/CB/SBR composites were produced when the modified AF was introduced into the SBR matrix. The results showed that compared with that of the composite with untreated AF, the interfacial bonding between the modified AF and the rubber matrix was improved, especially for tensile modulus elongations of 100% and 300%, and the tear strength of the composites was enhanced. Compared with those for the rubber composites with the AF treated by thermal oxidation, the mechanical properties of the rubber composites with the coated AF showed a greater improvement, but the heat generation was higher. Moreover, the thermal oxidation method not only improved the constant elongation stress and tear strength but also reduced the heat generation of the materials.

Effect of long aramid fiber on the properties of styrene‐butadiene rubber composites based on extrusion

“…Improving AF surface activity to enhance the performance of rubber composites has become a key challenge. Several in‐depth studies have been conducted on SFR, and valuable results have been achieved 20–22 . Zhong et al 23 researched the relationship between the interfacial bonding performance and fatigue performance of SFR composites.…”

“…Several in-depth studies have been conducted on SFR, and valuable results have been achieved. [20][21][22] Zhong et al 23 researched the relationship between the interfacial bonding performance and fatigue performance of SFR composites. The butadiene styrene vinyl-pyridine rubber latex (VPL) and polybutadiene maleate liquid rubber were used to coat the fibers to improve the interfacial bonding of the rubber composites and prolong the fatigue life.…”

Influences of fiber fibrillation degree on mechanical and tribological performances of aramid fiber/nitrile rubber composites

“…(1) increasing the chemical activity, [17][18][19][20][21] and (2) improving the surface roughness of the fiber. The typical methods of the chemical activity improvement include chemical grafting 17,22,23 and resorcinol-formaldehyde-latex (RFL) coating on the surface of the fiber.…”

“…Besides the weak connection between the fiber and the rubber matrix, the large modulus difference between these two phases leads to accelerated interface failure when the composite is under external load. The adhesion between the fiber and the matrix can be improved through two ways: (1) increasing the chemical activity, 17–21 and (2) improving the surface roughness of the fiber. The typical methods of the chemical activity improvement include chemical grafting 17,22,23 and resorcinol‐formaldehyde‐latex (RFL) coating on the surface of the fiber 21,24–26 .…”

Aramid pulp modified with imidazolium ionic liquids as a potential replacement for carbon black in fluorinated rubber composites

“…Recently, several studies on the use of poly-p-phenyleneterephthalamide pulp (PPTA), also called aramid pulp (AP), have been reported. Interesting properties, such as lowest swelling degree, [10] higher tear strength, [11][12][13] hardness, [10,11,14] tensile strength and stiffness [10,11,13,14] were obtained even when low amounts of filler are incorporated. [10,11,14,15] This is due to the high fibrillation of AP combined with its high aspect ratio.…”