Interaction between smithsonite and carboxyl collectors with different molecular structure in the presence of water: A theoretical and experimental study

2020 ◽  
Vol 510 ◽  
pp. 145410 ◽  
Author(s):  
Meng Liu ◽  
Jianhua Chen ◽  
Ye Chen ◽  
Yangge Zhu
Keyword(s):  
Molecular Structure ◽  
Experimental Study

Relaxation Processes in Vulcanized Rubber. II. Secondary Relaxation Due to Network Breakdown

1963 ◽  
Vol 36 (2) ◽  
pp. 389-398 ◽  
Author(s):  
A. N. Gent
Keyword(s):  
Molecular Structure ◽  
Experimental Study ◽  
Natural Rubber ◽  
Relaxation Process ◽  
Relaxation Processes ◽  
Secondary Relaxation ◽  
Oxidative Deterioration ◽  
Vulcanized Rubber ◽  
Oxidation Inhibitors ◽  
Natural Rubber Vulcanizates

Abstract An experimental study is described of a “secondary” relaxation process in stretched vulcanizates, which becomes dominant after long periods at normal temperatures. It is shown to be affected markedly by the temperature, the atmosphere in which the test is conducted, and the presence of oxidation inhibitors. It is therefore attributed to oxidative deterioration of the molecular structure. In some vulcanizates, however, a similar or even greater relaxation is found to occur in vacuo, and this is attributed to the failure of specific crosslink structures. The extent of recovery on releasing the extended testpieces has also been investigated for a number of natural rubber vulcanizates.

Study on the Treatment of Surfactant Wastewater by Anaerobic Biological Filter

2013 ◽  
Vol 671-674 ◽  
pp. 2754-2759 ◽  
Author(s):  
Wei Han ◽  
Guo Feng Zhou
Keyword(s):  
Molecular Structure ◽  
Experimental Study ◽  
Industrial Wastewater ◽  
Treatment Process ◽  
Refractory Industry ◽  
Efficient Treatment ◽  
Biological Filter ◽  
Filter Process ◽  
Industry Wastewater

Through experimental study on industrial wastewater of NanFengRiHua by Anaerobic Biological Filter process (AF), AF was proved as an efficient treatment process for refractory industry wastewater. AF process can change molecular structure and improve the biodegradability of nonbiodegradable organic, so AF process has very good practical prospects

Experimental Study of Lubricating Property at Grinding Wheel/Workpiece Interface Under NMQL Grinding

2020 ◽  
pp. 275-297
Keyword(s):  
Molecular Structure ◽  
Carbon Nanotubes ◽  
Experimental Study ◽  
Minimum Quantity Lubrication ◽  
High Viscosity ◽  
Lubricating Oil ◽  
Grinding Wheel ◽  
Oxide Nanoparticles ◽  
Lubrication Performance ◽  
Lubricating Property

Nanofluid is the suspension formed by lubricating oil and nanoparticles with particles sizes of 1~100 nm, and common nanoparticles include metal nanoparticles (Cu, Ag, etc.), oxide nanoparticles (Al2O3, SiO2, ZrO2, etc.), carbides (CNT, diamond), and MoS2 nanoparticles, etc. Different nanoparticles exhibit various physicochemical properties (e.g., structure and shape), which can influence their tribological characteristics. In this work, six nanofluids, namely, MoS2, SiO2, diamond, carbon nanotubes (CNTs), Al2O3, and ZrO2, were used as minimum quantity lubrication grinding fluids to select the kind of nanoparticles with optimum lubrication performance in grinding nickel alloy GH4169. Experimental results concluded the following: 1) Nanoparticles with spherical or sphere-like molecular structure and nanofluids with high viscosity demonstrate superior lubrication performances. 2) The polishing effect of nanodiamond particles enhances their surface morphology. 3) The lubricating property of the six nanofluids is described in the following order: ZrO2 < CNTs < ND < MoS2 < SiO2 < Al2O3.

The molecular structure of benzyl fluoride — a combined theoretical and experimental study

1979 ◽  
Vol 57 ◽  
pp. 149-162 ◽  
Author(s):  
R.J. Abraham ◽  
R.A. Hearmon ◽  
M. Trætteberg ◽  
P. Bakken
Keyword(s):  
Molecular Structure ◽  
Experimental Study

INFLUENCE OF SURFACE POLISHING ON THE FRICTION BEHAVIORS OF NBR

2018 ◽  
Vol 25 (07) ◽  
pp. 1950016 ◽  
Author(s):  
BINGQI JIANG ◽  
XIAOHONG JIA ◽  
FEI GUO ◽  
YUMING WANG
Keyword(s):  
Molecular Structure ◽  
Experimental Study ◽  
Contact Angle ◽  
Friction Coefficient ◽  
Surface Topography ◽  
Friction Process ◽  
Surface Polishing ◽  
Shearing Strength ◽  
Mechanical Breaking ◽  
Abrasive Paper

An experimental study on the tribology behavior and mechanism of NBR-Steel pair has been carried out. Abrasive paper was used to polish the NBR surface. The influences of surface topography on the friction coefficient were investigated based on the block-on-ring tribometer. Results show that polishing with abrasive paper is an effective method to reduce the friction coefficient of NBR on steel. Superlubricity was also found in the test. A new method to explain the superlubricity based on the contact angle and surface molecular structure was put forward in this work. Abrasive paper polishing changes the surface asperities, so affects the contact angle, so as to influence the boundary limiting shearing strength, and then causes the superlubricity. During the friction process the microstructure obviously changed, along with mechanical breaking of the molecular chain.

scholarly journals Computational and Experimental Study on Molecular Structure of Benzo[g]pyrimido[4,5-b]quinoline Derivatives: Preference of Linear over the Angular Isomer

2017 ◽  
Vol 7 (10) ◽  
pp. 967 ◽  
Author(s):  
Jorge Trilleras ◽  
Dency Pacheco ◽  
Alfredo Pérez-Gamboa ◽  
Jairo Quiroga ◽  
Alejandro Ortiz ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Experimental Study ◽  
Quinoline Derivatives
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