Mechanical property investigation of single polymer particles with different surfactant additive contain for monodisperse polymer particle synthesized

2016 ◽  
Author(s):  
Yi-Chun Chen ◽  
Yu-Chen Kao ◽  
Kai-Chi Chen
Keyword(s):  
Mechanical Property ◽  
Polymer Particle ◽  
Polymer Particles ◽  
Surfactant Additive ◽  
Monodisperse Polymer Particle

Experimental Study on Parameter Optimization of Silicon Wafer CMP Using Composite Abrasives Slurry

2009 ◽  
Vol 69-70 ◽  
pp. 214-218
Author(s):  
Xue Feng Xu ◽  
H.T. Ma ◽  
B.X. Ma ◽  
Wei Peng
Keyword(s):  
Silicon Wafer ◽  
Material Removal Rate ◽  
Material Removal ◽  
Colloidal Silica ◽  
Rotation Speed ◽  
Removal Rate ◽  
Polymer Particle ◽  
Optimal Parameters ◽  
Polymer Particles ◽  
Mechanism Of Interaction

In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. The mechanism of interaction between silica abrasives and polymer particles was analyzed. Small silica abrasives were seen to attach onto the surface of the polymer particles. Composite abrasives slurry was obtained by adding polymer particles into single abrasive slurry. Three key parameters, the concentration of colloidal silica, the concentration of polymer particle and the speed of polishing, which influence the material removal rate of silicon wafer were analyzed by Taguchi method and the optimal parameters were obtained. Experimental results indicated that the maximum material removed rate of 353nm/min was obtained when optimal craft parameters of 5% colloidal silica, 3% polymer particle, 50rpm plate and carrier rotation speed were selected.

scholarly journals Heat exchange of a roller with a particle from polymeric material when it is pressed into tissue

2019 ◽  
Vol 298 ◽  
pp. 00086
Author(s):  
Vladimir Fedyaev ◽  
Valentin Khaliulin ◽  
Marat Faskhutdinov ◽  
Alexey Belyaev ◽  
Liliya Sirotkina
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Initial Conditions ◽  
Thermal Contact ◽  
Polymer Particle ◽  
Heat Propagation ◽  
Conductive Heat ◽  
Polymer Particles ◽  
Heat Conservation ◽  
The Heat Balance

We study the heat transfer of polymer particles with a roller that presses the material of the particles into the fabric. Provided that the speed of movement of the tissue with the particles relative to the roller is small, the heat exchange of the pressed particles with the environment is not taken into account, a mathematical model of conductive heat transfer in the contacting roller, polymer particle and reinforcing fabric is proposed. This model includes heat conservation equations written with respect to average temperatures of the roller, particles, fabric, as well as boundary and initial conditions. Assuming that there is perfect thermal contact between the polymer particles and the fabric, in the direction of heat propagation the average thickness of the pressed tissue particle is small, the layer of material of particles and fabric is considered thermally thin, the temperature in it varies slightly in thickness. As a result, the initial system of three equations is reduced to one equation with respect to the temperature of the roller, which is supplemented by the corresponding boundary and initial conditions. In the case when the temperature along the radius of the roller varies along its radius linearly, the specific heat flux on the surface of the roller is estimated. After that, this expression is substituted into the heat balance equation of a thermally thin layer consisting of particle material and tissue, which is integrated after certain transformations.

Observation for mechanical property variations of single polymer particles

2007 ◽  
Vol 105 (2) ◽  
pp. 585-592 ◽  
Author(s):  
Dong Ok Kim ◽  
Jeong Hee Jin ◽  
Won Il Shon ◽  
Seok Heon Oh
Keyword(s):  
Mechanical Property ◽  
Polymer Particles

Effect of Salinity and Temperature on Swelling Behavior of Nano/Micro Polymer Particle

2013 ◽  
Vol 448-453 ◽  
pp. 3993-3997
Author(s):  
Yu Lou ◽  
Wei Yao Zhu ◽  
Xue Ling Zhang ◽  
Yun Qian Long
Keyword(s):  
Oil Recovery ◽  
Polymer Particle ◽  
Swelling Behavior ◽  
Swelling Kinetics ◽  
Swelling Ratio ◽  
Polymer Particles ◽  
Equilibrium Swelling ◽  
Swelling Characteristics ◽  
Equilibrium Swelling Ratio ◽  
Kinetics Of

Nano/micro polymer particles of acrylamide (AM), acrylic acid (AA), methyl methacrylate (MMA) are used to enhance oil recovery. Swelling kinetics of nano/micro polymer particles were investigated through experimental analysis and statistical analysis. The effect of salinity and temperature on swelling behavior over time is studied experimentally. The swelling kinetics of nano/micro polymer particle was described by second order kinetics. Equilibrium swelling ratio and swelling rate were obtained through nonlinear regression. The quantitative relationships between equilibrium swelling ratio and salinity, temperature were presented. Results show that the swelling ratio increases with increasing temperature or decreasing salt concentration. The study provides a direct perspective of swelling characteristics of nano/micro polymer particles for oil recovery enhancement.

The Mechanism of Polymer Particles in Silicon Wafer CMP

2009 ◽  
Vol 626-627 ◽  
pp. 231-236 ◽  
Author(s):  
Xue Feng Xu ◽  
H.F. Chen ◽  
H.T. Ma ◽  
B.X. Ma ◽  
Wei Peng
Keyword(s):  
Silicon Wafer ◽  
Material Removal Rate ◽  
Material Removal ◽  
Colloidal Silica ◽  
Removal Rate ◽  
Polymer Particle ◽  
Silica Shell ◽  
Polymer Particles ◽  
Interaction Potential Energy ◽  
Maximum Material Removal Rate

In order to increase the material removal rate of silicon wafer, composite abrasives slurry was used in CMP. Zeta potential of polymer particle was measured and interaction potential energy between silica abrasives and polymer particles in slurry were analyzed and calculated. Adsorptions between silica abrasives and polymer particles were observed with TEM. CMP experiments had been taken to analyze the effects of polishing parameters (the concentration of colloidal silica and polymer particle, the pressure and the speed of polishing) on the material removal rate. The mechanism of polymer particle in polishing was elaborated. Experimental results indicated that PS, PMMA and BGF polymer particles could adsorb silica abrasives in slurry. Silica shell/PS core, silica shell/PMMA core and silica shell/BGF core particles could be used to formulate composite abrasives slurries. The material removal rate with composite abrasives slurry was higher than that of single abrasive slurry. The maximum material removal rate was obtained with silica shell/BGF core composite abrasives slurry.

Highly sensitive solid-phase immunoenzymometric assay for placental and placental-like alkaline phosphatases with a monoclonal antibody and monodisperse polymer particles.

1985 ◽  
Vol 31 (1) ◽  
pp. 54-59 ◽  
Author(s):  
J L Millán ◽  
K Nustad ◽  
B Nørgaard-Pedersen
Keyword(s):  
Monoclonal Antibody ◽  
Enzyme Inhibitors ◽  
Solid Phase ◽  
Sample Volume ◽  
Polymer Particle ◽  
Human Testis ◽  
Placental Alkaline Phosphatase ◽  
Polymer Particles ◽  
Highly Sensitive ◽  
Normal Human

Abstract We have used a mouse monoclonal antibody (H7) to placental alkaline phosphatase (PLAP, EC 3.1.3.1) in developing an immunoenzymometric assay for PLAP and PLAP-like enzymes. The antibody is bound to sheep anti-mouse IgG (Ab2) covalently coupled to tosylated shell-and-core light (1.07 g/cm3) monodisperse polymer particles. Adding the H7-Ab2-polymer particle suspension to a PLAP-containing sample gives maximal binding of the antigen within 10 min. PLAP and PLAP-like enzymes remain active and bound to the solid-phase throughout all assay manipulations, and can thus be saved for future testing. In testing the enzymes for inhibition by L-Phe, L-Phe-Gly-Gly, L-Leu, and L-homoarginine, the effect of all the inhibitors is fully reversible. The assay is highly versatile, and its sensitivity (routinely 0.05 micrograms/L) can be increased 1000-fold by adjusting the sample volume and incubation time (sample volume is irrelevant between 50 microL and 5 mL). We have measured the basal activities of PLAP in men and women and, by using enzyme inhibitors, have characterized it as corresponding to the PLAP-like phenotypes described in normal human testis.

Preparation and Characterization of Coloured Polymer Particles for Electronic Ink

2017 ◽  
Vol 25 (2) ◽  
pp. 161-166
Author(s):  
Jing Wang ◽  
Yaqing Feng ◽  
Xianggao Li
Keyword(s):  
Dispersion Medium ◽  
Polymer Particle ◽  
Electric Response ◽  
Polymer Particles ◽  
Structure Morphology ◽  
Dc Electric Field ◽  
Electronic Ink ◽  
Thermal Stability Of ◽  
C Nmr

A new coloured polymer particle was prepared, in which chromophoric groups were introduced onto the surface of the polymer particle for use in electronic ink. The structure, morphology and thermal stability of polymer electrophoretic particles were characterized using FTIR, solid state 13C-NMR, SEM and TGA. Electrophoretic mobility measurements proved that the polymer particles had negative charges in the electrophoretic dispersion medium. Electronic ink microcapsules containing the polymer particles were prepared by coacervation. The polymer particles had a reversible electric response in the microcapsules under a DC electric field.

scholarly journals In Situ Modification of Polyisoprene by Organo-Nanoclay during Emulsion Polymerization for Reinforcing Natural Rubber Thin Films

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1338
Author(s):  
Jadsadaporn Chouytan ◽  
Ekwipoo Kalkornsurapranee ◽  
Christopher Fellows ◽  
Wisut Kaewsakul
Keyword(s):  
Thin Films ◽  
Natural Rubber ◽  
Emulsion Polymerization ◽  
Sodium Dodecyl ◽  
Polymer Particle ◽  
Nanocomposite Films ◽  
Polymer Particles ◽  
Scanning Calorimetry ◽  
In Situ Modification ◽  
Monomer Content

Nanoclay-modified polyisoprene latexes were prepared and then used as a reinforcing component in natural rubber (NR) thin films. Starve-fed emulsion (SFE) polymerization gives a higher conversion than the batch emulsion (BE), while the gel and coagulation contents from both systems are comparable. This is attributed to the SFE that provides a smaller average polymer particle size which in turn results in a greater polymerization locus, promoting the reaction rate. The addition of organo-nanoclay during synthesizing polyisoprene significantly lessens the polymerization efficiency because the nanoclay has a potential to suppress nucleation process of the reaction. It also intervenes the stabilizing efficiency of the surfactant—SDS or sodium dodecyl sulfate, giving enlarged average sizes of the polymer particles suspended in the latexes. TEM images show that nanoclay particles are attached on and/or inserted in the polymer particles. XRD and thermal (differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)) analyses were employed to assess the d-spacing of nanoclay structure in NR nanocomposite films, respectively. Based on the overall results, 5 wt% of nanoclay relative to the monomer content utilized to alter the polyisoprene during emulsion polymerization is an optimum amount since the silicate plates of nanoclay in the composite exhibit the largest d-spacing which maximizes the extent of immobilized polymer constituent, giving the highest mechanical properties to the films. The excessive amounts of nanoclay used, i.e., 7 and 10 wt% relative to the monomer content, reduce the reinforcing power because of the re-agglomeration effect.

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