Toughening polystyrene by core–shell grafting copolymer polybutadiene-graft-polystyrene with potassium persulfate as initiator

Cai, Gui Di; Yang, Hong; Zhu, Li Dan; Liu, Hua; Wu, Guangfeng; Zhang, Ming Yao; Zhou, Chao; Gao, Guanghui; Zhang, Hui Xuan

doi:10.1016/j.jiec.2012.10.024

Cited by 15 publications

(11 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, there are some limitations of these techniques that need to be addressed for effective water remediation. Some drawbacks like high energy requirement, a large amount of sludge production and maintenance cost are considered a major challenge to handle [3]. For instance, the well-recognized precipitation technique based on economical approach produces a large amount of precipitate sludge that involves an additional process for the further treatment [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Fathy

Zayed

Moustafa

2019

Heliyon

View full text Add to dashboard Cite

Core-shell particles are a class of materials from nanostructures that have received increased attention recently due to their interesting properties and wide range of applications in catalysis, biology, chemistry of materials and sensors. Simple and cost-effective one-pot synthesis route to directly prepare CaCO 3 @highly porous carbon microsphere in a core–shell structure (denoted as CaCO 3 /HPC) had been developed as a high-performance heavy metals sorbent. XRD (X-Ray Diffraction), SEM (scanning electron microscopy), Raman, FTIR (Fourier Transform Infrared Spectroscopy) and BET tools were used in structure characterization of the products. The adsorption properties of the products obtained were studied. From this study the adsorption performances of CaCO 3 /HPCwere found to be optimal by comparing the maximum adsorption capacity of heavy metal ions (Pb (II) and Co(III)) with CaCO 3 /HPC.The adsorption of CaCO 3 /HPCtest to Pb(II) and Co(III), in particular Pb(II) had a good effect over a wide pH range (pH 2–7). The maximum adsorption capacitiesof CaCO 3 /HPC for Pb (II) and Co(III) were 677.6 mg/g, and 308.5 mg/g, respectively, at pH = 6 (lead ion was 5.5) and 25 °C, and the adsorption rate was fast. The lead ions can be adsorbed almost entirely in 5 minutes and only 0.2 g/L was the best effective doseof adsorbent. The prepared and carefully testednanocomposites had been found to be of excellent performances in adsorption and in analytical regeneration. The adsorption processof Pb(II) and Co(III) through core shell of the preparednanocomposite adsorbent was found to be a second-order chemical adsorption and fit for Langmuir and Freundlich isotherms, in the form of amonomolecular and multi-layer heavy metal adsorptionprocesses. The (CaCO 3 /HPC)-based sorbents (with and without) pelletization shows superior heavy metals adsorption performances compared to a CaCO 3 -based sorbent.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Fathy

Zayed

Moustafa

2019

Heliyon

View full text Add to dashboard Cite

show abstract

“…The literature 40,41 shows that the impact strength of PS is often increased by adding an elastomeric phase, that is, the rubber phase aids in the toughening of PS. To incorporate a recycled rubber compound into a polymer matrix, the particle size of the rubber and the adhesion between the matrix and the rubber are the main factors in the mechanical performance of the blends.…”

Section: Characterizations Of Blends and Hipsmentioning

confidence: 99%

Incorporation of a recycled rubber compound from the shoe industry in polystyrene: Effect of SBS compatibilizer content

Luna

Araújo

Siqueira

et al. 2019

Journal of Elastomers & Plastics

View full text Add to dashboard Cite

This research aimed to evaluate the influence of styrene–butadiene–styrene (SBS) compatibilizer in the polystyrene blends properties with a recycled styrene–butadiene rubber compound. The SBS content was 5, 7.5, and 10%. Commercial high-impact polystyrene (HIPS) was used for comparison. The results indicated that the viscosity of the blends was higher than that of HIPS. The blends compatibilized with 5 and 7.5% had the same level of impact strength as HIPS, while the one with 10% obtained a gain of 80% in relation to HIPS. The flexural strength, hardness, heat deflection temperature, and Vicat softening temperature properties were similar to those of HIPS, which was attributed to the presence of inorganic fillers, minimizing losses in these properties. By atomic force microscopy, two distinct phases were observed, and in the morphology analyzed through scanning electron microscopy, a typical characteristic of immiscible blends was observed.

show abstract

“…Neste tipo de reação o grau de enxerto é normalmente baixo, porém, a mistura é mais efetiva do que em processos de extrusão. As vantagens da utilização do processo de grafting são a possibilidade de obtenção de melhor mistura, com tamanho de domínio controlado (normalmente entre 0,1 -10 µm), melhor adesão entre o elastômero e o polímero vítreo e a presença de três fases: vítrea, elastomérica e o copolímero ou graft [14,27].…”

Section: Elastômeros Como Modificadores De Impactounclassified

Utilização de Elastômeros como Modificadores de Impacto em Poliamidas

Rocetto

Zeni

Brandalise³

2016

Sci. cum Ind.

View full text Add to dashboard Cite

A utilização de elastômeros como modificadores de impacto em blendas poliméricas é um assunto continuamente explorado em estudos que buscam aprimorar o desempenho de polímeros frágeis, sem a necessidade de grandes investimentos em produção como o desenvolvimento de novos polímeros para aplicações específicas. As poliamidas são polímeros de engenharia com propriedades térmicas e mecânicas atrativas, porém apresentam limitações na resistência ao impacto, principalmente em baixas temperaturas e na presença de entalhe, característica que pode ser modificada com a presença de uma fase elastomérica dispersa na matriz. Existem diversos fatores que influenciam na tenacificação de poliamidas e de polímeros frágeis em geral com elastômeros, que vão desde as propriedades físicas, mecânicas e térmicas isoladas de cada componente da blenda, às características da mistura, como a termodinâmica, compatibilidade, adesão e tensão interfacial, forma de obtenção e condições de processamento, até as propriedades finais da blenda como o comportamento térmico, dinâmico-mecânico e a morfologia que é extremamente importante e define o comportamento mecânico do material tenacificado. Esses tópicos são abordados nesta revisão, trazendo os aspectos importantes em relação aos elastômeros e suas misturas com poliamidas com o objetivo de tenacificação, e ainda resultados de estudos realizados ao longo dos anos até os dias de hoje com diferentes tipos de poliamidas e de elastômeros, que auxiliam no entendimento do comportamento destes tipos de blendas. Palavras-chaveElastômeros, modificadores de impacto, poliamida, blendas poliméricas, tenacificação. Use of Elastomers as Impact Modifiers in Polyamides AbstractThe use of elastomers as impact modifiers in polymeric blends is a continuously explored subject in studies that aim to improve the performance of brittle polymers, without requiring large investments in production and development of new polymers for specific applications. Polyamides are engineering polymers with attractive thermal and mechanical properties. However, they still present limitations in impact behavior, especially at low temperatures and in the presence of notch, a characteristic which can be solved with the presence of a rubbery phase dispersed on the matrix. There are several factors that influence the toughening of polyamides and brittle polymers in general with elastomers, which go from physical, mechanical and thermal properties of each isolated component of the blend, to the characteristics of the mixture, such as thermodynamics, compatibility, adhesion and interfacial tension, processing ways and conditions, until the final properties of the blend, as thermal and dynamic-mechanical behavior and the morphology, which is extremely important and defines the mechanical behavior of the toughened material. These issues are approached on this review, bringing the important aspects regarding elastomers and their blends with polyamides for toughening, and also discussion from studies conducted over the years to the present day...

show abstract

Toughening polystyrene by core–shell grafting copolymer polybutadiene-graft-polystyrene with potassium persulfate as initiator

Cited by 15 publications

References 18 publications

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Synthesis and applications of CaCO3/HPC core–shell composite subject to heavy metals adsorption processes

Incorporation of a recycled rubber compound from the shoe industry in polystyrene: Effect of SBS compatibilizer content

Utilização de Elastômeros como Modificadores de Impacto em Poliamidas

Contact Info

Product

Resources

About