Fracture behavior of NR and SBR vulcanizates filled with ground rubber having uniform particle size

2002 ◽  
Vol 85 (12) ◽  
pp. 2491-2500 ◽  
Author(s):  
Seung-Cheol Han ◽  
Min-Hyeon Han
Keyword(s):  
Particle Size ◽  
Fracture Behavior ◽  
Ground Rubber ◽  
Uniform Particle Size

Ground Rubber Tire / Thermoplastic Composites: Effect of Different Ground Rubber Tires

1993 ◽  
Vol 66 (4) ◽  
pp. 664-677 ◽  
Author(s):  
P. Rajalingam ◽  
J. Sharpe ◽  
W. E. Baker
Keyword(s):  
Particle Size ◽  
Impact Energy ◽  
Surface Oxidation ◽  
Surface Concentration ◽  
Thermoplastic Composites ◽  
Beam Radiation ◽  
Rubber Tire ◽  
Ground Rubber ◽  
Surface Modification Techniques ◽  
The Impact

Abstract Thermoplastic composites containing different Ground Rubber Tire (GRT) materials, Linear Low Density Polyethylene (LLDPE) and, in some case, a coupling agent (IB‘E’, an ethylene glycidyl methacrylate copolymer) were prepared by melt blending. The impact energies of all the thermoplastic composites (normally containing 40 wt % GRT) were evaluated using an instrumented impact tester. The effects of the GRT particle-size, particle size distribution and shape, the mode of grinding, and the oxygen surface concentration were analyzed. The wet-ambient-ground GRT based composites show higher surface oxidation and give better impact energy than cryo-ground and normal air-ground GRT based composites. Smaller GRT particle size results in a small increase in the impact property of the composite and a greater influence on the melt processability of the composites. Of the different GRT surface modification techniques studied for improved composite interfacial adhesion and impact properties the composites from electron beam radiation treated GRT yield higher increases in impact energy in comparison to corona and plasma treated GRT based composites.

The Development and Evaluation of a Four-roller Flour Mill with Parallelogram Configuration

2007 ◽  
Vol 3 (6) ◽  
Author(s):  
John Alaba Victor Famurewa
Keyword(s):  
Particle Size ◽  
Opposite Direction ◽  
Size Reduction ◽  
Sieve Analysis ◽  
Feeding Problems ◽  
Roller Mill ◽  
Flour Mill ◽  
Wide Gap ◽  
Uniform Particle Size ◽  
Milled Product

A roller mill was designed and evaluated using four equal size cylindrical rollers with their centers on vertices of a parallelogram. The relative speeds and opposite direction of rotation of the rollers allowed the discharge of the materials on them, and splitting took place in between the first pair of corrugated rollers. The broken seeds were directed towards the second and third nips where adequate size reduction was accomplished consecutively by smooth rollers. The milled products were separated into three fractions: chaff, flour and size larger than flour. The chaff and the flour are collected at different outlets, while the particles with sizes larger than flour are blown back into the hopper for further reduction. The mill was evaluated using three grains: maize, beans and soy beans at different combinations of evaluating parameters. The machine was able to mill grains to flour size without any leakage at the nip points. For all the grains, a wide gap set produced higher throughput than narrow, as well as fast feeding in smaller particle size and higher throughput. The results obtained from the evaluation showed that the machine is very capable of three-stage size reduction to produce flour, avoiding the feeding problems in three high roller mills. Sieve analysis of the milled product for each experiment showed uniform particle size.

Reduction of SSI by Hydrogen and its Microscopic Morphology

2012 ◽  
Vol 487 ◽  
pp. 672-676
Author(s):  
Jun Guo Li ◽  
Wei Tian ◽  
Shou Zhang Li
Keyword(s):  
Particle Size ◽  
Compressive Strength ◽  
Wastewater Treatment ◽  
High Activity ◽  
Iron Content ◽  
Sponge Iron ◽  
Reduction Temperature ◽  
Microscopic Morphology ◽  
Uniform Particle Size

Spherical sponge iron (SSI) with high activity and intension possesses potential characteristics to be utilized as wastewater treatment material, such as higher iron content, uniform particle size, higher compressive strength, etc. Observation on apparent morphology of exterior and microscopic morphology of SSI reduced by hydrogen under different temperature was carried on with SEM. When the reductive temperature was relatively lower than T4, the quantities of iron grain in exterior and interior of SSI increased with the increasing of temperature. When the temperature was elevated to T5, the particle size of iron grain was increased, and lots of macro-holes formed, especially in the interior section of SSI. When the temperature was T4, the SSI possesses more favorable ability to remove pollutant from wastewater. Moreover, the iron content in SSI was mostly reach to the summit under this temperature. In summarization, the reduction temperature should be controlled under T4 temperature if the sponge iron was utilized in wastewater treatment.

The Effect of the Second Phase Particle Size on Fracture Behavior of Cu – 0.1% Sn Ultra-Fine-Grained Alloy

2016 ◽  
Vol 59 (1) ◽  
pp. 116-120
Author(s):  
S. N. Faizova ◽  
G. I. Raab ◽  
I. A. Faizov ◽  
D. A. Aksenov ◽  
N. G. Zaripov ◽  
...  
Keyword(s):  
Particle Size ◽  
Fracture Behavior ◽  
Phase Particle ◽  
Second Phase ◽  
Fine Grained

Ultrafast synthesis of magnetic hollow carbon nanospheres for the adsorption of quinoline from coking wastewater

2020 ◽  
Vol 44 (18) ◽  
pp. 7490-7500 ◽  
Author(s):  
Yan Cui ◽  
Weiwei Kang ◽  
Lei Qin ◽  
Jinghong Ma ◽  
Xuguang Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Coking Wastewater ◽  
Carbon Nanospheres ◽  
Hollow Carbon ◽  
Uniform Particle Size

Magnetic hollow carbon nanospheres (MHCNSs) with a uniform particle size (40 nm) were ultrafast synthesized for removing quinoline from coking wastewater.

scholarly journals Two-Step Hydrothermal Synthesis of Well-Dispersed (Na0.5Bi0.5)TiO3 Spherical Powders

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Zhuo Shi ◽  
Lianlai Sun ◽  
Kun Liu ◽  
Yingying Zhang ◽  
Weiyuan Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Synthesis Method ◽  
Spherical Shape ◽  
Raw Material ◽  
Second Step ◽  
In Situ Crystallization ◽  
Uniform Particle Size

(Na0.5Bi0.5)TiO3 (NBT) powders that have well-dispersed, uniform particle size and well-developed spherical shape were successfully prepared by a two-step hydrothermal synthesis method. Nanosized TiO2 powders were firstly synthesized by a hydrothermal method, and then the TiO2 particles are used as a raw material to synthesize NBT powders. It was found that by using the TiO2 nanoparticles as Ti source, the well-dispersed spherical NBT powders with about 200 nm in size could be obtained at 200°C for 4 h with a low mineralizer concentration of 6 mol/L NaOH in the second step. The formation of spherical NBT powders can be explained by first generating nuclei on the surface of TiO2 nanoparticles via in situ crystallization mechanism and then crystal growing and agglomerating by dissolution-recrystallization mechanism.

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