Photoinitiated dispersion polymerization of methyl methacrylate: A quick approach to prepare polymer microspheres with narrow size distribution

2007 ◽  
Vol 46 (4) ◽  
pp. 1329-1338 ◽  
Author(s):  
Jia Chen ◽  
Zhaohua Zeng ◽  
Jianwen Yang ◽  
Yonglie Chen
Keyword(s):  
Methyl Methacrylate ◽  
Size Distribution ◽  
Dispersion Polymerization ◽  
Polymer Microspheres ◽  
Narrow Size Distribution

Synthesis of PMMA Microparticles with a Narrow Size Distribution by Photoinitiated RAFT Dispersion Polymerization with a Macromonomer as the Stabilizer

2014 ◽  
Vol 47 (19) ◽  
pp. 6856-6866 ◽  
Author(s):  
Jianbo Tan ◽  
Guangyao Zhao ◽  
Yijie Lu ◽  
Zhaohua Zeng ◽  
Mitchell A. Winnik
Keyword(s):  
Size Distribution ◽  
Dispersion Polymerization ◽  
Narrow Size Distribution

scholarly journals WAYS OF IMPROVING THE SPECIFICITY OF THE LATEX AGGLUTINATION REACTION

2016 ◽  
Vol 11 (2) ◽  
pp. 17-22 ◽  
Author(s):  
A. V. Sandzhieva ◽  
A. V. Bakhtina ◽  
А. А. Sivaev ◽  
L. Yu. Basyreva ◽  
S. A. Gusev ◽  
...  
Keyword(s):  
Size Distribution ◽  
Diagnostic Test ◽  
Functional Groups ◽  
Specific Interaction ◽  
Latex Agglutination ◽  
Aggregative Stability ◽  
Polymer Microspheres ◽  
Agglutination Reaction ◽  
Narrow Size Distribution ◽  
Test Systems

The article describes research on the development of new diagnostic test systems operating on the basis of latex agglutination reaction, in which polymer microspheres are used as bioligand carriers instead of erythrocytes. Polymeric microspheres to be used as bioligand carriers must satisfy the following requirements: narrow size distribution, diameter of 5 microns. Besides, they must be characterized by aggregative stability in water and buffer solutions and be contained functional groups in the surface layer for linking with the functional groups of the protein. They are crosslinked particles obtained by copolymerization of styrene and divinylbenzene on polystyrene seed particles 1.5 microns in diameter with a narrow size distribution followed by modification by chloromethylation and amination by ethylenediamine. To increase the hydrophilicity of the surface of the polymer microspheres and to reduce nonspecific adsorption of proteins dextran was immobilized on the surface of the particles by covalent binding with amino groups of particles using Maillard reaction. It was found that diagnostic test systems, where modified dextran particles were used as carriers of the bioligand (Vi-antigen), are characterized by insufficient specificity and require additional modification of the surface of the polymer microspheres to eliminate its non-specific interaction with the surface of the polymer plate used for the latex agglutination reaction. A nonionic surfactant (Tween 80) proposed for the surface modification and used in a certain concentration provides the best reaction specificity.

Narrow size-distribution poly(methyl methacrylate) nanoparticles made by semicontinuous heterophase polymerization

2010 ◽  
Vol 119 (3) ◽  
pp. 1827-1834 ◽  
Author(s):  
J. Aguilar ◽  
M. Rabelero ◽  
S. M. Nuño-Donlucas ◽  
E. Mendizábal ◽  
A. Martínez-Richa ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Size Distribution ◽  
Narrow Size Distribution ◽  
Poly Methyl Methacrylate ◽  
Heterophase Polymerization ◽  
Semicontinuous Heterophase Polymerization

Macrostructure and microphysics of Saturn's E-ring

1984 ◽  
Vol 75 ◽  
pp. 607-613 ◽  
Author(s):  
Kevin D. Pang ◽  
Charles C. Voge ◽  
Jack W. Rhoads
Keyword(s):  
Size Distribution ◽  
Spherical Shape ◽  
Mie Scattering ◽  
Narrow Size Distribution ◽  
Electrostatic Levitation ◽  
Volcanic Origin ◽  
Micron Diameter

Abstract.All observed optical and infrared properties of Saturn's E-ring can be explained in terms of Mie scattering by a narrow size distribution of ice spheres of 2 - 2.5 micron diameter. The spherical shape of the ring particles and their narrow size distribution imply a molten (possibly volcanic) origin on Enceladus. The E-ring consists of many layers, possibly stratified by electrostatic levitation.

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