The Influence of Initiator Type On Emulsion Copolymerization OF Styrene with Butyl Acrylate

Chrástová, Viera; Citovický, P.; Bartus, Jan

doi:10.1080/10601329408545289

Cited by 4 publications

(6 citation statements)

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“…To control these properties, different operational variables can be used (temperature, initiator, chain transfer agent (CTA), and comonomer) as well as different reactors (batch, semibatch, and continuous) and also different control strategies. 2 Numerous papers can be found in the literature [3][4][5][6][7][8][9][10][11][12] dealing with the emulsion copolymerization of n-butyl acrylate (n-BA) and styrene (S). Because of the different nature of these monomers, a wide range of materials with interesting mechanical properties can be obtained varying the comonomer ratio.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous papers can be found in the literature − dealing with the emulsion copolymerization of n -butyl acrylate ( n -BA) and styrene (S). Because of the different nature of these monomers, a wide range of materials with interesting mechanical properties can be obtained varying the comonomer ratio.…”

Section: Introductionmentioning

confidence: 99%

“…Chrastova et al , studied the influence of the initiator type on kinetics, molecular weights and particle size in batch emulsion copolymerization of n -BA and S in a wide range of comonomer compositions ( n -BA/S: 10/90 to 90/10). Using redox initiator systems of different water solubilities, they found that the larger the amount of styrene the smaller the molecular weights.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics and Polymer Microstructure of the Seeded Semibatch Emulsion Copolymerization of n-Butyl Acrylate and Styrene

et al. 2001

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The seeded semibatch emulsion polymerization of n-butyl acrylate, n-BA, with varying amounts of styrene as comonomer was investigated using potassium persulfate as initiator at 75 °C. The kinetics, the gel fraction, the molecular weight distribution, MWD, and the level of branches were determined. It was observed that the instantaneous conversion, the fraction of gel, the average molecular weights, and the level of branches were affected by the amount of styrene in the recipe. In particular, the fraction of gel decreased from 55% to almosnt nil and the level of branches decreased from 14 to 5 branches per 1000 carbons of the backbone when the amount of styrene increased from 0 to 10%. These results have technological implications because the amount of gel and the level of branches can be controlled; this is something that was not possible when initiator concentration or monomer feed rates were used as control variables. A mathematical model for predicting the kinetics, the fraction of gel, the level of branches and the MWD was used to analyze the effect of styrene on the seeded semibatch emulsion polymerization of n-BA. In addition, it is shown that the adhesive properties of these latexes can be modified by adding small amounts of styrene.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Kinetics and Polymer Microstructure of the Seeded Semibatch Emulsion Copolymerization of n-Butyl Acrylate and Styrene

et al. 2001

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“…To illustrate the functionality of the method, cases of reactions' alternating feed profile or seed type are presented. The VBC monomer was chosen as an adequate component for possible post-reactions with the chloromethyl group and its affinity with S to make a copolymer (r S = 0.72 and r VBC = 1.31 [18] while r S = 0.72 and r BA = 0.27 [19]). Due to the specific interaction of their respective chemical groups, the styrene and n-butyl acrylate system holds a low interaction parameter [20] and is considered a weakly segregating monomer pair [21] which allows the coexistence of a broad range of copolymer compositions with low tendency to phase separation.…”

Section: Introductionmentioning

confidence: 99%

A Methodology Towards Mechanical Properties Optimization of Three-Component Polymers by the Gradual Variation of Feed Composition in Semi-Continuous Emulsion-Free Radical Polymerization

et al. 2019

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In this work, a new methodology for the synthesis of three-component polymers (TCPs) was developed using a seeded, semi-continuous free-radical emulsion polymerization towards the optimization of the moduli–ultimate deformation performance and energy dissipation capacity for a styrene (S), n-butyl acrylate (BA), and 4-vinylbenzyl chloride (VBC) system. The three components were sequentially fed in pairs, varying feed composition along the conversion using S as the common monomer. To prepare a reference material, an industrial method was utilized with those monomers, using an equivalent global composition in a two-stage batch process (TS). Nanophase formation in the particles was observed by transmission electron microscopy (TEM), while the separation of the phases in the solid samples was observed by atomic force microscopy (AFM). The changes in glass transition temperature were determined by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The latter was primarily used to compare mechanodynamic properties as a function of temperature for the two synthesis methods used. Thus, the higher toughness of the forced composition three-component polymeric materials was evaluated by means of their energy dissipation capacity, toughness, and stress–strain measurements at several temperatures.

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“…The industrial importance of St/BA copolymers has been revealed by many research scientists 5–8. The kinetics of St/BA copolymers has been dealt by many researchers 9–17.…”

Section: Introductionmentioning

confidence: 99%

Poly(styrene‐co‐butyl acrylate) latex‐reinforced polyester nonwoven fabric composites: Thermal and morphological studies

Kumar

Yaakob

Siddaramaiah³

2009

J of Applied Polymer Sci

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A series of thermoplastic composites were fabricated by impregnating the polyester nonwoven fabric in poly(styrene-co-butyl acrylate) latex having different monomer compositions of styrene and butyl acrylate viz., 100/0, 90/10, 80/20, 70/30, 60/40, and 50/50 weight by weight. Thermogravimetric analysis (TGA) of the composites was performed to establish the thermal stability and their mode of thermal degradation. From TGA thermograms, a slight improvement in thermal stability of the composites was noticed compared to polyester nonwoven fabric. Degradation kinetic parameters were obtained for the composites using Broido and Coats-Redfern methods. The activation energy (E a ) of the composites for the thermal degradation process lies in the range 7.1-261 and 60-264 kJ/mol for Broido and Coats-Redfern methods respectively. Morphology of the tensile-fractured composites was studied using scanning electron microscopic technique.

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The Influence of Initiator Type On Emulsion Copolymerization OF Styrene with Butyl Acrylate

Cited by 4 publications

References 0 publications

Kinetics and Polymer Microstructure of the Seeded Semibatch Emulsion Copolymerization of n-Butyl Acrylate and Styrene

Kinetics and Polymer Microstructure of the Seeded Semibatch Emulsion Copolymerization of n-Butyl Acrylate and Styrene

A Methodology Towards Mechanical Properties Optimization of Three-Component Polymers by the Gradual Variation of Feed Composition in Semi-Continuous Emulsion-Free Radical Polymerization

Poly(styrene‐co‐butyl acrylate) latex‐reinforced polyester nonwoven fabric composites: Thermal and morphological studies

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