Dispersing behavior of recycled rubber particles

Shahidi, Nima; Teymour, Fouad; Arastoopour, Hamid

doi:10.1002/masy.200450236

Cited by 4 publications

(2 citation statements)

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“…The importance of recycling crosslinked rubber used in automotive tires, sealing, and hoses has been wellknown. [2][3][4][5][6] An important method to utilize waste tires is to turn them into waste ground rubber tire (WGRT) powder, which could be incorporated into a polymer matrix to obtain the blends filled with WGRT. As WGRT could be used as fillers in rubber compounding, 7 some researches have been conducted on the use of WGRT as fillers in various thermoplastics to prepare thermoplastic elastomers, such as WGRT/PP, 8 WGRT/PE, 9 and WGRT/ other thermoplastic.…”

Section: Introductionmentioning

confidence: 99%

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Waste ground rubber tire powder/thermoplastic vulcanizate blends: Preparation, characterization, and compatibility

Wang

2013

J of Applied Polymer Sci

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In this article, waste ground rubber tire (WGRT) powder was introduced into thermoplastic vulcanizate (TPV) to prepare the blends of WGRT powder/TPV. The mechanical, rheological, thermal aging, and dynamic properties of the blends were investigated with respect to the particle size and dosage of WGRT powder. The results showed that tensile strength, tear strength, elongation at break, and tensile permanent deformation of the blends increased with the decrease in WGRT particle size and decreased with the dosage of WGRT. The effects of different types and dosages of compatibilizers on mechanical and rheological properties of the blends were studied. The results showed that the compatibilizer PP‐g‐MAH could effectively improve the interfacial compatibility between WGRT and the TPV matrix to enhance the comprehensive properties of blends. The TPV/WGRT/PP‐g‐MAH blends obtained the best overall properties when prepared at the weight ratio 100/30/5. Rheological studies demonstrated that the WGRT/TPV blends represented lower apparent viscosity after PP‐g‐MAH were added, which means that processing performance of the blends was improved by PP‐g‐MAH. Scanning electron microscopy was used to study the morphologies of the blends. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39868.

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Section: Introductionmentioning

confidence: 99%

“…The importance of recycling crosslinked rubber used in automotive tires, sealing, and hoses has been wellknown . An important method to utilize waste tires is to turn them into waste ground rubber tire (WGRT) powder, which could be incorporated into a polymer matrix to obtain the blends filled with WGRT.…”

Section: Introductionmentioning

confidence: 99%

Waste ground rubber tire powder/thermoplastic vulcanizate blends: Preparation, characterization, and compatibility

Wang

2013

J of Applied Polymer Sci

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Dynamic reaction inside co‐rotating twin screw extruder. I. Truck tire model material/polypropylene blends

Lee

Balasubramanian

Kim

2007

J of Applied Polymer Sci

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Waste ground rubber tire (WGRT) is a complex composite containing various elastomers, carbon black, zinc oxide, stearic acid, processing oils, and other curatives. Most of the waste ground rubber tire is composed of mainly natural rubber (NR) and styrene butadiene rubber (SBR) in varying proportions. Blending it with other thermoplastic materials is difficult due to the inherent thermodynamic incompatibility. But, the compatibility can be increased by making the reactive sites in WGRT with suitable chemicals under optimum condition of shearing inside a twin screw extruder and it is said to undergo a dynamic reaction inside the extruder. To understand the mechanism of dynamic reaction process of a rubber/polyolefin blend, the blending of a truck tire model material rubber with polyolefin was first tried before it was applied to waste WGRT material. It was observed that the blends of a truck tire model rubber material and PP thermoplastic are physical mixture of two incompatible polymers in which a continuous plastic phase is largely responsible for the tensile properties. The rubber particles are the dispersed phase. The large particle size and the poor adhesion of these rubber particles are believed to be liable for the poor tensile properties. In case of blends of truck tire model material with isotactic polypropylene the tensile properties are found to be lower than that of its PP-g-MA counterpart which can be attributed to the reaction of the MA with the carbon black particles. A schematic representation of the possible interactions has been proposed. The effect of addition of compatibilizers such as SEBS and SEBS-g-MA has also been studied. The tensile and TGA studies indicate that the polarity of SEBS and SEBS-g-MA induces an increase in the performance characteristics for both types of polyolefins but the intensity of this increase is higher in the PP-g-MA based blends.

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