Improvement in Physical and Mechanical Properties of Iir/Cr Rubber Blend Organoclay Nanocomposites

Abstract

The effects of organoclay loading and chloroprene rubber (CR) concentration on the cure characteristics, microstructure, and mechanical and rheological properties of isobutylene–isoprene rubber (IIR)/CR blend were investigated. Different compositions of CR (10, 20, and 40 wt%) with Cloisite15A as organo modified nanoclay (1, 3, 5, and 7 wt%) were used for blends by a two-roll mill. Samples were vulcanized at 175 °C using a hot press. The cure and scorch times and also the maximum torque of the composites increased with the incorporation of organoclay. Mechanical properties such as tensile strength, elongation at break, modulus (100%, 200%, and 300%), and resilience improved with increasing nanoclay loading. The structure of the nanocomposites was characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). XRD results of nanocomposites indicated that the intercalation of polymer chains into the clay gallery was deduced from increasing the interlayer distance of silicate layers. TEM and SEM also directly confirmed XRD results.

Fabrication and characterization properties of polypropylene/polycarbonate/clay nanocomposites prepared with twin-screw extruder

“…Polymer nanocomposites based on nanoclay (NC) and polymer blend matrix have been widely investigated by our group [19][20][21][22][23], but up to our knowledge, there is no sufficient quantitative data published on nanocomposites based on the PP/PC blend. In the present work, an analysis of the morphology and mechanical properties of PC/PP nanocomposites prepared by melt blending method is presented, and the effect of different weight fractions of PC and NC were incorporated on the final properties of PP is discussed.…”

Silica-coated nano calcium carbonate reinforced polychloroprene rubber nanocomposites: influence of silica coating on cure, mechanical and thermal properties

“…Ethanol is used to homogenize the mixture of water and TEOS. Due to its very high activity, the oligomers of polysiloxane along with Si(OH) 4 readily adsorb to the surface of nano CaCO 3 . Then, silica polymerizes on the surface of nano CaCO 3 and, as a consequence, the surface of the nano CaCO 3 is readily covered by silica film.…”

“…In the first step, the hydrolysis of TEOS occurs in the presence of water and NH 3 to produce Si(OH) 4 . The role of NH 3 solution is to promote the hydrolysis of TEOS.…”

“…The role of NH 3 solution is to promote the hydrolysis of TEOS. In the next step, monomers or oligomers of polysiloxane are formed by the reaction of Si(OH) 4 with other Si(OH) 4 or TEOS molecule. Subsequently, oligomers of polysiloxane polymerize to form polysiloxane with a three-dimensional network structure.…”

“…In recent scenario, polymer nanocomposites based on inorganic nano filler have attracted massive attention, both in industrial and academic field of research [1][2][3][4][5]. Unquestionably, nano filler offers advanced and versatile way to prepare innovative engineering materials with a variety of application range.…”