Effect of Initial Polymerization Conditions on the Structure of Ethyl Acrylate-Methacrylic Acid Copolymer Latex Particles

1995 ◽  
Vol 60 (10) ◽  
pp. 1756-1764 ◽  
Author(s):  
Jaromír Šňupárek ◽  
Pavel Bradna ◽  
Libuše Mrkvičková ◽  
František Lednický ◽  
Otakar Quadrat
Keyword(s):  
Methacrylic Acid ◽  
Colloidal Stability ◽  
Particle Growth ◽  
Ethyl Acrylate ◽  
Phase Partitioning ◽  
Acid Copolymer ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Alkali Addition ◽  
Polymerization Conditions

Non-seeded semi-continuous emulsion copolymerizations of ethyl acrylate-methacrylic acid (85/15 wt. ratio) were carried out using various emulsifier and initiator concentrations and phase partitioning. The effect of the polymerization conditions on the particle size and morphology was investigated by means of scanning electron microscopy, light scattering and viscometry. Disintegration into smaller particles on alkali addition confirmed coagulative mechanism of the particle growth. This is distinct mainly if the colloidal stability of the polymerizing system is reduced due to lower concentration of the emulsifier and higher concentration of peroxydisulfate initiator which suppress double layer thickness of forming particles.

Effect of Coagulative Mechanism of Particle Growth on the Structural Heterogeneity of Ethyl Acrylate-Methacrylic Acid Copolymer Latex Particles

1993 ◽  
Vol 58 (10) ◽  
pp. 2451-2457 ◽  
Author(s):  
Jaromír Šňupárek ◽  
Pavel Bradna ◽  
Libuše Mrkvičková ◽  
František Lednický ◽  
Otakar Quadrat
Keyword(s):  
Methacrylic Acid ◽  
Particle Growth ◽  
Structural Heterogeneity ◽  
Ethyl Acrylate ◽  
Heterogeneous Structure ◽  
Small Particles ◽  
Latex Particles ◽  
Acid Copolymer ◽  
Methacrylic Acid Copolymers ◽  
Scanning Electron

Latex particles of ethyl acrylate-methacrylic acid copolymers prepared by semicontinuous emulsion polymerization with a monomer emulsion feed were found to disintegrate into smaller subparticles on alkalization. The phenomenon observed by light scattering and scanning electron microscopy is explained in terms of heterogeneous structure of latex particles which are agglomerates of small particles formed by coagulation during polymerization. The influence of particle size and polymerization route on particle heterogenity is discussed.

Structure and flow behavior of crosslinked ethyl acrylate-methacrylic acid copolymer dispersion particles

1998 ◽  
Vol 276 (10) ◽  
pp. 879-886 ◽  
Author(s):  
O. Quadrat ◽  
L. Mrkvic˘ková ◽  
Z. Walterová ◽  
L. Titkova ◽  
P. Bradna ◽  
...  
Keyword(s):  
Methacrylic Acid ◽  
Flow Behavior ◽  
Ethyl Acrylate ◽  
Acid Copolymer

Molecularly Imprinted Polymer for Preparation and Adsorption of Phenylalanine

2011 ◽  
Vol 306-307 ◽  
pp. 638-641 ◽  
Author(s):  
Fu Guang Lu ◽  
Yu Lei Xi ◽  
Zhen Lv ◽  
Lu Lu Fan ◽  
Hua Min Qiu ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Binding Sites ◽  
Template Molecule ◽  
Binding Properties ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Molecular Imprinting Technology ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Polymerization Conditions

Molecular imprinting technology was employed to produce one kind of Phenylalanine ( Phe) molecularly imprinted polymers (MIP)by precipitation polymerization using Phe, anhydrous alcohol, acrylamide, ethylene glycol dimethacrylate, and azobisisobutyronitrile as template, porogen, functional monomer, cross-linker and initiator respectively. In this study, the polymerization conditions were optimized. The template on particle size and morphology of polymers were investigated in detail by scanning electron microscopy (SEM) and adsorption isotherm determination. The binding properties of Phe on imprinted polymers were evaluated in water by equilibrium rebinding experiments, and the maximum number of adsorption was 0.60 mmol/g. It is indicated that the existence of binding sites in imprinted polymers was proved and the binding sites showed good specific and selective capability to the template molecule Phe. So the polymers would be used to separate Phe from medicine and food.

STUDYING REACTIVITY RATIOS AND PHYSICAL PROPERTIES OF METHACRYLIC ACID - ETHYL ACRYLATE COPOLYMER

2015 ◽  
Vol 53 (2) ◽  
Author(s):  
Tran Vu Thang ◽  
Pham Thi Thu Ha ◽  
Nguyen Van Khoi ◽  
Nguyen Van Manh ◽  
Pham Thi Thu Trang
Keyword(s):  
Physical Properties ◽  
Methacrylic Acid ◽  
Ethyl Acrylate ◽  
Reactivity Ratios ◽  
Acrylate Copolymer

Metal Oxide Nanostructures Chemistry

2019 ◽  
Author(s):  
Jean-Pierre Jolivet
Keyword(s):  
Particle Growth ◽  
General View ◽  
Ceramic Powders ◽  
Metal Hydroxides ◽  
Synthesis Conditions ◽  
Zirconium Oxides ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Ordered Aggregation ◽  
Size And Morphology

This much-anticipated new edition of Jolivet's work builds on the edition published in 2000. It is entirely updated, restructured and increased in content. The book focuses on the formation by techniques of green chemistry of oxide nanoparticles having a technological interest. Jolivet introduces the most recent concepts and modelings such as dynamics of particle growth, ordered aggregation, ionic and electronic interfacial transfers. A general view of the metal hydroxides, oxy-hydroxides and oxides through the periodic table is given, highlighting the influence of the synthesis conditions on crystalline structure, size and morphology of nanoparticles. The formation of aluminum, iron, titanium, manganese and zirconium oxides are specifically studied. These nanomaterials have a special interest in many technological fields such as ceramic powders, catalysis and photocatalysis, colored pigments, polymers, cosmetics and also in some biological or environmental phenomena.

Direct manipulation of particle size and morphology of ordered mesoporous silica by flow synthesis

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13331-13340 ◽  
Author(s):  
T. N. Ng ◽  
X. Q. Chen ◽  
K. L. Yeung
Keyword(s):  
Particle Size ◽  
Mesoporous Silica ◽  
Hollow Spheres ◽  
Ordered Mesoporous Silica ◽  
Direct Manipulation ◽  
Flow Synthesis ◽  
Precise Control ◽  
Ordered Mesoporous ◽  
Particle Size And Morphology ◽  
Size And Morphology

Flow-synthesis of mesoporous silica allows deliberate and precise control over the size and shapes and enables the preparation of complex microstructures (i.e., hollow spheres).

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