Carbon black filled powdered natural rubber: Preparation, particle size distribution, mechanical properties, and structures

Abstract

Carbon black (HAF) filled powdered natural rubber (P(NR/HAF)) was prepared and the particle size distribution, mechanical properties, and micromorphology of P(NR/HAF) were studied. A carbon black-rubber latex coagulation method was developed for preparing carbon black filled free-flowing, noncontact staining NR powders with particle diameter less than 0.9 mm. A powdering mechanism model was put forward to describe the powdering process, which shows that the key technical points consist in the surfactant with good emulsification properties and the polymer coating resin with good film forming properties. SEM analysis shows that carbon black and rubber matrix have formed a macroscopic homogenization in the P(NR/ HAF) particles without contact staining, and carbon black particles are well dispersed in rubber matrix with diameter of about 50 -150 nm. P(NR/HAF) vulcanizate showed better mechanical properties than bale natural rubber/carbon black blends (NR/HAF) and simple NR latex/carbon black blends (NRL/HAF), which depends primarily upon the absence of free carbon black, the fine dispersion of filler on the rubber matrix, and the better interaction between carbon black and rubber matrix due to the proper preparation condition of noncontact staining carbon black filled powdered NR.

Effects of carbon blacks with various structures on vulcanization and reinforcement of filled ethylene-propylene-diene rubber

“…SEM is commonly applied method to observe the morphology of rubber/carbon black composites [22,31,32]. The morphologies of the carbon black filled EPDM are shown in Figure 6.…”

“…Scanning electron microscope (SEM) is a technique used to probe the filled rubber [20,21]. The carbon black mainly exists as the primary aggregation in rubber [2,22]. The priority of preparing favorable rubber is to obtain the tailor-made cure and mechanical properties.…”

Thermal and Mechanical Properties of Natural Rubber Composites Reinforced with Cellulose Nanocrystals from Southern Pine

“…Carbon black and silica are the most frequently used reinforcing fillers in the rubber industry. [3][4][5] However, the processing of these fillers leads to high energy consumption and environment pollution. Moreover, the high density of these fillers makes the final filled rubber composites have a high density as well, which reverses the outstanding light weight property of rubber materials.…”

Investigation of eco-friendly cellulosic nanoparticles potential as reinforcement agent in the production of natural rubber composites

“…The inherent strength of vulcanized natural rubber can be further improved upon by interfacing the rubber with a reinforcing phase such as carbon black and silica particles in order to obtain improved modulus and durability required for structural and engineering applications. The use of silica filler is expensive while carbon black has been reported to be carcinogenic and limits the aesthetic design of rubber products [5]. The essential attributes of a reinforcing phase has been reported to be particle size (high surface area), strength and strong interfacial interaction between polymer matrix and reinforcing materials.…”