The comparison between initial charge, shot and modified shot processes and their effects on macrostructure of particles in emulsion copolymerization of styrene–butadiene–acrylic acid

2006 ◽  
Vol 66 (2) ◽  
pp. 247-254 ◽  
Author(s):  
Ali Reza Mahdavian ◽  
Mahdi Abdollahi
Keyword(s):  
Acrylic Acid ◽  
Emulsion Copolymerization ◽  
Initial Charge ◽  
Styrene Butadiene

scholarly journals Base Case Simulation of a Semi-Batch Emulsion Copolymerization Process

2006 ◽  
Vol 6 (2) ◽  
pp. 82
Author(s):  
Iwan Harsono ◽  
Herman Hindarso ◽  
Nani Indraswati
Keyword(s):  
Emulsion Polymerization ◽  
Process Model ◽  
Batch Reactor ◽  
Operating Conditions ◽  
Base Case ◽  
Emulsion Copolymerization ◽  
Process Understanding ◽  
Case Simulation ◽  
Level Of Understanding ◽  
Styrene Butadiene

It has been long recognized that emulsion polymerization is a complex heterogeneous process involving transport of monomers and other species and free radicals between aqueous phase and organic phases. Though there are a number of models available in the literature, most of them deal only with specific aspects in emulsion polymerization and are far from being general. To simulate this complicated process and to achieve an adequate level of understanding, a Polymer Plus' software from Aspen Technology, Inc. has been used. The objective of this work is to illustrate the principle use of Polymers Plus' and to simulate and analysis the free-radical seeded emulsion copolymerization of styrene-butadiene process model in a semi-batch reactor. The base case simulation can be used to gain process understanding by analyzing how process variables and operating conditions during the course of a semi-batch reactor affect product quality.

Improved colloidal stability by seeded emulsion copolymerization of styrene with acrylic acid

2004 ◽  
pp. 64-67
Author(s):  
Xaviera E. E. Reynhout ◽  
Jan Meuldijk ◽  
Bart A. H. Drinkenburg
Keyword(s):  
Acrylic Acid ◽  
Colloidal Stability ◽  
Emulsion Copolymerization

Carboxyl functionalized poly(methyl methacrylate-acrylic acid-ethylene glycol dimethacrylate) copolymer particles and their amination with amine-nucleophiles

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Hasan Ahmad ◽  
Md. Emtiaz Hossain ◽  
M. Abdur Rahman ◽  
M. Mahbubor Rahman ◽  
M. A. Jalil Miah ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Methyl Methacrylate ◽  
Ethylene Glycol Dimethacrylate ◽  
Carboxyl Groups ◽  
Carboxyl Group ◽  
Glycol Dimethacrylate ◽  
Emulsion Copolymerization ◽  
Poly Methyl Methacrylate ◽  
Ftir Spectral Analysis

AbstractPoly(methyl methacrylate-acrylic acid-ethylene glycol dimethacrylate) copolymer particles abbreviated as P(MMA-AA-EGDM) copolymer particles were prepared by soap-free emulsion copolymerization. The concentration of carboxyl group on/near the surface of particles increased with the increase in acrylic acid (AA) content in the recipe. The carboxyl groups were reacted with amine nucleophiles such ethylene diamine and 1,6-diaminohexane through preactivation with dicyclohexyl carbodiimide as a coupling agent. The modified particles were characterized by electron micrographs and FTIR spectral analysis. Adsorption behaviours of some biomolecules were measured to have idea about=-0 the polarity of the particles surface

Evaluation of alkylated diphenyl ether disulfonate surfactants in 60 : 40 styrene—butadiene emulsion copolymerization

1990 ◽  
Vol 41 (78) ◽  
pp. 1549-1568 ◽  
Author(s):  
J. W. Vanderhoff ◽  
V. L. Dimonie ◽  
M. S. El-Aasser ◽  
L. A. Settlemeyer
Keyword(s):  
Diphenyl Ether ◽  
Emulsion Copolymerization ◽  
Styrene Butadiene

Preparation and Properties of Nanocomposites Based on Poly(Vinyl acetate) and Montmorillonite Organized with Acrylic Acid

2011 ◽  
Vol 335-336 ◽  
pp. 3-11
Author(s):  
Jun Wang
Keyword(s):  
Acrylic Acid ◽  
Vinyl Acetate ◽  
Differential Scanning Calorimetric ◽  
X Ray Diffraction ◽  
Covalent Bonds ◽  
Emulsion Copolymerization ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Ft Ir ◽  
Vinyl Group

The nanocomposites of poly(vinyl acetate)/montmorillonite (PVAc/MMT) were prepared using vinyl acetate and organically modified alkaline calcium base montmorillonite (MMT) by in situ emulsion copolymerization. The organic modification was acrylic acid including terminal reactive vinylic group. The samples were characterized using fourier transformation infrared spectroscopy (FT-IR), X-ray diffraction (XRD). Thermal properties of the PVAc/MMT films were studied by thermogravimetric (TG) and differential scanning calorimetric (DSC). The FT-IR results indicated that the vinyl group on the surface of the vinyl MMT nanoparticles had been successfully copolymerized with vinyl acetate. The XRD results demonstrated that the MMT was exfoliated during polymerization. The exfoliated PVAc/MMT nanocomposites showed a lower glass transition temperature (Tg) and a worse thermal stability compared with the pure PVAc. However, bonding power of the nanocomposite latex of PVAc/MMT was improved due to the strong interaction between silica nanoparticles and polymer matrix via covalent bonds.

Water-Based Coatings for Building Part I: Preparation and Physical Properties of Polyacrylate-Siloxane Emulsion

2012 ◽  
Vol 174-177 ◽  
pp. 520-523 ◽  
Author(s):  
Pei Wang ◽  
Xia Zhen Zhang ◽  
Li Na Heng ◽  
Teng Yu ◽  
Xie Wei Chen ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Physical Properties ◽  
Optimal Conditions ◽  
Pencil Hardness ◽  
Emulsion Copolymerization ◽  
Stirring Rate ◽  
Water Based ◽  
Acrylate Emulsion ◽  
Vinyl Triethoxysilane ◽  
Silicone Acrylate

This study is to report the synthesis of polyacrylate-siloxane latex with vinyl triethoxysilane(DB-151), methyl methacrylate(MMA) acrylic acid(AA), butyl acrylate(BA) by emulsion copolymerization and characterized by FTIR. The physical properties are also analysized by water absorption, pencil hardness, circle adhesion method, etc.. The polymerization factors for emulsion had been discussed in several aspects. The results showed that the optimal conditions for synthesizing silicone-acrylate emulsion were of DB -151content of 6%~8%, emulsifier OP-10/SDS/ DNS-458 ratio:2/1/1, in stirring rate 450 r/min in the period of disperse and emulsification, stirring rate 200 r/min in the period of synthesis, with reaction temperature 75°C.

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