The influence of copolymerization with methacrylic acid on poly(butyl acrylate) film properties

Koh, Andrew Yew Chiang; Mange, Siyabonga; Bothe, Marc; Leyrer, Reinhold J.; Gilbert, Robert G.

doi:10.1016/j.polymer.2005.12.053

Cited by 17 publications

(12 citation statements)

References 23 publications

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“…The same author also stipulates that long chain branches are the precursor molecules for gel formation. Gelation results from termination through combination in the polymeric chains inside the latex particles . An increase in M w at S3 is most likely followed by rapid gel formation in the polymer particles which is proven by the observation that the percentage recovery and the average M w decrease from S3 to S10.…”

Section: Resultsmentioning

confidence: 92%

Field Flow Fractionation for the Size, Molar Mass, and Gel Content Analysis of Emulsion Polymers for Water‐Based Coatings

Makan

Williams

Pasch

2016

Macro Chemistry & Physics

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In the present investigation, styrene‐acrylic and pure acrylic emulsions used in water‐based decorative coatings are characterized by size exclusion chromatography (SEC) and asymmetric flow field‐flow fractionation (AF4). Both the separation techniques are coupled online to multiangle laser light scattering (MALLS) and refractive index detection to investigate the molar mass properties during the course of the free radical polymerization reaction. For the acrylic emulsion, kinetic samples are taken from the reactor at fixed time intervals and analyzed. In SEC‐MALLS, unusual elution behavior is observed which is found previously for highly branched polymer species. In contrast, the AF4 fractograms indicate normal mode elution without any unusual behavior as compared to the SEC analyses. The molar masses obtained by AF4 are significantly higher compared to the SEC results. Further, AF4 is used to determine the gel contents of the kinetic samples of the acrylic emulsion and for both the acrylic and styrene‐acrylic emulsions, AF4 proves to be a robust and feasible tool allowing for improved correlations of the molecular and materials properties of water‐based polymer emulsions.

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Section: Resultsmentioning

confidence: 92%

Field Flow Fractionation for the Size, Molar Mass, and Gel Content Analysis of Emulsion Polymers for Water‐Based Coatings

Makan

Williams

Pasch

2016

Macro Chemistry & Physics

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“…No caso do AMA (látex STy/ABu/AMA) os resultados mostram que 81 % estão presentes no interior das partículas, ficando o restante dividido entre a superfície e a fase aquosa. Estes resultados foram similares aos resultados obtidos por diversos trabalhos publicados, mostrando que o AMA polimeriza preferencialmente no interior das partículas de polímero, independente da concentração utilizada [3,7,[12][13][14][15][16]. O látex que apresentou menor concentração de grupos carboxílicos na fase aquosa (9% m/m) foi o látex com o AMA.…”

Section: Distribuição Dos Grupos Carboxílicosunclassified

“…Diversos trabalhos foram realizados empregando os ácidos acrílico [3,4,7,9,[11][12][13] e metacrílico [3,7,11,[12][13][14][15][16][17] em polimerizações em emulsão com o objetivo de entender como estes monômeros são incorporados nos polímeros e o efeito destes monômeros nas propriedades finais dos látexes. Ocepek et al [17] estudaram o efeito de diferentes estratégias de adição dos ácidos acrílico e metacrílico na preparação de látexes carboxilados.…”

Section: Introductionunclassified

Efeito dos ácidos itacônico e fumárico na copolimerização em emulsão do estireno com acrilato de n-butila para produção de argamassa cimentícia

Santos

Oliveira

2019

Matéria (Rio J.)

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RESUMO Monômeros carboxílicos são frequentemente empregados em formulações de polímeros obtidos via polimerização em emulsão e miniemulsão visando melhorar ás propriedades de aplicação dos látexes. O objetivo deste trabalho foi avaliar o efeito dos ácidos itacônico IAI), fumárico (AF) e metacrílico (AMA) na copolimerização em emulsão do estireno (STy) com o acrilato de n-butila (ABu), visando a obtenção de látexes carboxilados estáveis e com baixa concentração de poli(ácido carboxílico) na fase aquosa para serem empregados como aditivo na preparação de argamassa cimentícia. Látexes de STy/ABu/AI, STy/ABu/AF e STy/ABu/AMA foram obtidos e caracterizados em relação ao teor de sólidos, diâmetro de partícula, polidispersão, viscosidade, temperatura mínima de formação de filme (TMFF), estabilidade ao gelo-degelo, estabilidade coloidal e distribuição dos grupos carboxílicos. Argamassas cimentícias foram preparadas empregando os látexes produzidos. Os resultados obtidos mostram que o tipo de ácido carboxílico empregado afeta as propriedades físico-químicas dos látexes e a interação com os componentes da argamassa. Dentre os ácidos estudados, o AMA apresentou menor efeito nas propriedades coloidais dos látexes, enquanto que o látex produzido com o AF apresentou baixa estabilidade coloidal, elevada concentração de grupos carboxílicos na fase aquosa e baixa interação com os componentes da argamassa.

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“…4 These properties justify the use of small amounts of the functional monomers in industrial formulations used essentially as binder in paper coatings, carpet backing, adhesives, bonding agents in architectural paints, and for adjusting the latex viscosity by varying the degree of neutralization. [4][5][6] In decorative paints, one of the most important properties of the carboxylic acids is the wet scrub resistance of the dry paint film used as an indication of the pigment binding capacity of the binder, with the classification being according to the number of scrub cycles. There are numerous latex and paint formulation parameters which can influence the scrub performance of paint.…”

Section: Introductionmentioning

confidence: 99%

“…2,5 The polymerization of the hydrophilic monomers with hydrophobic monomers, such as STy, result in the formation of a block copolymer anchored to the particle. 6 These carboxylic groups anchored to the latex particle can interact directly with the pigment particle. An additional steric barrier can be created, which can further prevent pigment agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings

Oliveira¹,

Silva²,

Guerrini

2011

J Coat Technol Res

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This study investigates the influence of carboxylic monomers, such as itaconic acid (IA), on the colloidal properties of the latexes made by semicontinuous emulsion copolymerization of styrene (STy) with n-butyl acrylate (BA). A number of copolymerization runs were carried out with different IA concentrations. The effect of functional monomer on the overall conversion, the colloidal properties of the latexes, and the distribution of the carboxylic groups (buried, particle surface and aqueous phase) were examined. The carboxylic groups present in the latexes were analyzed using conductimetric and potentiometric titrations. The behavior of the IA on the wet scrub resistance of highly pigmented paints for architectural coatings was examined and correlated with the distribution of the carboxylic groups. The results obtained showed that the properties of highly pigmented paints are greatly dependent on the amount and distribution of the carboxylic groups. The carboxylic acid distributed in the aqueous phase has a strong influence on the wet scrub resistance and on the characteristics of the final products.

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The influence of copolymerization with methacrylic acid on poly(butyl acrylate) film properties

Cited by 17 publications

References 23 publications

Field Flow Fractionation for the Size, Molar Mass, and Gel Content Analysis of Emulsion Polymers for Water‐Based Coatings

Field Flow Fractionation for the Size, Molar Mass, and Gel Content Analysis of Emulsion Polymers for Water‐Based Coatings

Efeito dos ácidos itacônico e fumárico na copolimerização em emulsão do estireno com acrilato de n-butila para produção de argamassa cimentícia

Effect of itaconic acid on the wet scrub resistance of highly pigmented paints for architectural coatings

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