Toward an Understanding of the Role of Water-Soluble Oligomers in the Emulsion Polymerization of Styrene−Butadiene−Acrylic Acid. Separation and Characterization of the Water-Soluble Oligomers

2002 ◽  
Vol 35 (22) ◽  
pp. 8346-8355 ◽  
Author(s):  
Xue-yi Yuan ◽  
Victoria L. Dimonie ◽  
E. David Sudol ◽  
Mohamed S. El-Aasser
Keyword(s):  
Acrylic Acid ◽  
Emulsion Polymerization ◽  
Water Soluble ◽  
Styrene Butadiene

Toward an Understanding of the Role of Water-Soluble Oligomers in the Emulsion Polymerization of Styrene−Butadiene−Acrylic Acid. Mechanisms of Water-Soluble Oligomer Formation

2002 ◽  
Vol 35 (22) ◽  
pp. 8356-8370 ◽  
Author(s):  
Xue-yi Yuan ◽  
Victoria L. Dimonie ◽  
E. David Sudol ◽  
James E. Roberts ◽  
Mohamed S. El-Aasser
Keyword(s):  
Acrylic Acid ◽  
Emulsion Polymerization ◽  
Water Soluble ◽  
Oligomer Formation ◽  
Styrene Butadiene

Bentonite-Based Organoclays as Innovative Flame Retardants Agents for SBS Copolymer

2008 ◽  
Vol 8 (12) ◽  
pp. 6316-6324 ◽  
Author(s):  
M. Comes Franchini ◽  
P. Fabbri ◽  
A. Frache ◽  
G. Ori ◽  
M. Messori ◽  
...  
Keyword(s):  
Flame Retardants ◽  
Morphological Characterization ◽  
Tem Analysis ◽  
Important Functional Property ◽  
Octadecyltrimethylammonium Bromide ◽  
Nitrogen Containing Compounds ◽  
Styrene Butadiene ◽  
Heat Released

Two organophilic bentonites, based on nitrogen-containing compounds, have been synthesised via ion exchange starting from pristine bentonite with octadecyltrimethylammonium bromide (OTAB) and with synthetic melamine-derived N2,N4-dihexadecyl-1,3,5-triazine-2,4,6-triamine (DEDMEL). The chemical and morphological characterization of the organoclays was based on XRD, TEM, Laser Granulometry, X-Ray Fluorescence and CEC capacity. Copoly(styrene-butadiene-styrene)-nanocomposites (SBS-nanocomposites) were obtained by intercalation of the SBS-copolymer into these new organoclays by melt intercalation method. XRD and TEM analysis of the organoclays and of the micro/nano-composites obtained are presented. The effect of the organoclays on the SBS-nanocomposite's flammability properties was investigated using cone calorimeter. An encouraging decrease of 20% in the peak heat released rate (PHRR) has been obtained confirming the important role of melamine's based skeleton and its derived organoclays to act as effective fire retardants and for the improvement of this important functional property in SBS copolymers.

Preparation and Characterization of PMAA/SiO2 Composite Particle Via Emulsion Polymerization

2012 ◽  
Vol 528 ◽  
pp. 184-187 ◽  
Author(s):  
Ke Hong Zhang ◽  
Jun Juan Du ◽  
Hui Xiao ◽  
Yan Yuan
Keyword(s):  
Acrylic Acid ◽  
Emulsion Polymerization ◽  
Silica Gel ◽  
Graft Polymerization ◽  
Polymer Layer ◽  
Grafted Polymer ◽  
Chemically Modified ◽  
Ft Ir ◽  
Silica Gel Particles

Silica gel particle was chemically modified by using 3-methacryloxypropyl trimethoxysilane (KH-570) as coupling agent. Then poly methyl acrylic acid (PMAA) was grafted on the surface of particles MPS-SiO2 with the method of Emulsion Polymerization, and grafting particles PMMA/SiO2 were prepared. The grafting particle PMAA/SiO2 was characterized by using FT-IR, TG and SEM. The experimental results show that the graft polymerization of methyl acrylic acid (MAA) on onto the surface of silica gel particles can successfully realized using the method of “graft from”. During the graft polymerization, the grafted polymer layer is a hindrance to the subsequent graft polymerization. When the grafted polymer layer reach to a certain density via overlapping and entwisting, a kinetic barrier will be built up. Hence, the grafting degree of the polymer under a certain condition has a limiting value.

Preparation and Characterization of Soap-Free Cationic Polystyrene Microspheres Using a Water Soluble Monomer

2014 ◽  
Vol 988 ◽  
pp. 84-88 ◽  
Author(s):  
Zong Qian Zhao ◽  
Bu Qin Xu ◽  
Gui Long Xu ◽  
Yi Wang ◽  
Jian Hu
Keyword(s):  
Emulsion Polymerization ◽  
Experimental Studies ◽  
Water Soluble ◽  
Synthesis Process ◽  
Particle Sizes ◽  
Polystyrene Microspheres ◽  
Latex Particles ◽  
Transmission Electron ◽  
Micro Morphology

Soap-free Cationic polystyrene microspheres were prepared by emulsion polymerization using a water soluble monomer Methacrylatoethyl trimethyl ammonium chloride (MADAC). Experimental studies were performed in detail to check the effect of the synthesis process of the microspheres, the MADAC dosage, and initiator dosage on the particle size and distribution. The chemical structure of latex particles was characterized by Fourier transform infrared spectroscopy. The micro-morphology of latex particles were observed by Transmission electron microscope. The results show that different particle sizes of polystyrene microspheres with good monodispersity were finally obtained by seeded semi-continuous emulsion polymerization.

Characterization of water-soluble oligomers formed during the emulsion polymerization of styrene by means of isotachophoresis

1993 ◽  
Vol 31 (2) ◽  
pp. 467-483 ◽  
Author(s):  
Bradley R. Morrison ◽  
Ian A. Maxwell ◽  
Donald H. Napper ◽  
Robert G. Gilbert ◽  
Joop L. Ammerdorffer ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Water Soluble
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