Application of percolation model on the brittle to ductile transition for polystyrene and polyolefin elastomer blends

Guo, Zhenghong; Fang, Zhengping; Tong, Lifang

doi:10.3144/expresspolymlett.2007.8

Cited by 12 publications

(18 citation statements)

References 34 publications

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“…The controllable properties based on the octene content, besides excellent processability of EOC, have widen its application areas. The results indicated that by applying the suitable compatibilization, EOC could desirably modify the toughness and the impact resistance of a wide range of thermoplastics such as PP, PET, polyamide 6, and PS . To the best of our knowledge, the role of nanoclay platelets as a compatibilizer for PS/EOC blend systems and how they affect the interfacial interactions between phases and their rheological and mechanical properties, besides their morphology, have not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

Assessment of compatibilization role of nanoclay in immiscible polystyrene/ethylene–octene copolymer blends via wide‐angle X‐ray scattering, microstructure, rheological analyses, and mechanical properties

Kiani

Entezam

Khonakdar

et al. 2019

J of Applied Polymer Sci

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Polystyrene (PS)/ethylene–octene copolymer (EOC) blends with 80/20 wt % composition containing different amounts (0, 1.0, 2.5, 5.0 and 7.5 wt %) of an organically modified nanoclay were prepared by one‐step melt‐mixing method. Also, the EOC‐rich blends with 80 wt % EOC content loaded with 0 and 5.0 wt % of the nanoclay were prepared under the similar processing conditions. Presence of both PS and EOC chains in between clay layers localized at the interface of the blends could be deduced by X‐ray diffraction analysis, which suggested formation possibility of PS‐EOC physical structures at the blend interface. Transmission electron microscopy results confirmed that clay nanoparticles were mainly localized at the interface of the blends and also partly in the PS and EOC components of the systems. The localization of the nanoclay was also described by the linear viscoelastic melt rheological studies. It is also revealed that nanoclay had stronger interactions with PS than EOC. This is reflected in the higher tensile properties in the PS‐rich system. The analysis of morphology of the developed systems by emulsification curve revealed that the optimum amount of nanoclay to modify PS‐rich blend is 2.5 wt %. At this clay loading, the blend exhibited the highest impact resistance. According to the overall results, suitability of nanoclay was confirmed for compatibilization of the PS/EOC blends. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48748.

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Section: Introductionmentioning

confidence: 99%

Assessment of compatibilization role of nanoclay in immiscible polystyrene/ethylene–octene copolymer blends via wide‐angle X‐ray scattering, microstructure, rheological analyses, and mechanical properties

Kiani

Entezam

Khonakdar

et al. 2019

J of Applied Polymer Sci

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“…The percolation model was used by Guo et al to investigate polystyrene=polyolefin elastomer blends. According to Guo, the percolation threshold of the POE content for BDT is 14 wt% in PS=POE blends [37] . In our investigation, the percolation threshold of the WF content for the brittle-ductile transition in the SBS-toughened WPCs is 15 wt%, which is close to the POE content in PS=POE blends.…”

Section: Results and Discussion Mechanical Propertiesmentioning

confidence: 99%

“…Percolation theories have been applied to describe the brittle-ductile transition of composites modified with elastomer [37][38][39][40][41][42] . The percolation model was used by Guo et al to investigate polystyrene=polyolefin elastomer blends.…”

Section: Results and Discussion Mechanical Propertiesmentioning

confidence: 99%

Polylactide-Based Wood Plastic Composites Toughened with SBS

Qiang

Gao

et al. 2012

Polymer-Plastics Technology and Engineering

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Wood plastic composites (WPCs) composed of polylactide (PLA), pine wood flour (WF), and SBS were successfully manufactured through extrusion blending followed by injection molding. The impact strength and elongation at the break of the PLA-based WPCs toughened with SBS were higher than their non-toughened counterparts, in contrast to the decrease in the tensile strength.There was a percolation process in brittle-ductile transition of the impact strength for the SBS-toughened WPCs when the WF content was between 15 and 35 wt%. TGA indicated that SBS had no significant effect on the thermal stability of the resulting hybrid composites.

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“…A Figura 7 apresenta a fotomicrografia do PS puro, no qual apresenta um aspecto liso e homogêneo, que está associado à natureza frágil deste polímero de baixa tenacidade. Além disso, observam-se estrias correspondentes as marcas e degraus deixados pela trinca responsável pela ruptura do corpo de prova e que foi nucleada a partir do entalhe [33]. Esta trinca que se propagou deixou marcas envolvendo pequenas cavidades (seta vermelha).…”

Section: Microscopia Eletrônica De Varreduraunclassified

Estudo do Comportamento Mecânico, Termomecânico e Morfológico de Misturas de Poliestireno/Composto de Borracha Reciclada (SBR)

Luna¹,

Silva

Araújo³

et al. 2015

Matéria (Rio J.)

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__________________________________________________________________________________________ RESUMOMisturas de polímeros constituem alternativa para a obtenção de materiais com propriedades que, em geral, não são encontradas em um único material. O objetivo deste trabalho foi produzir misturas poliméricas a partir de uma matriz de poliestireno (PS) com composto de borracha reciclada (SBR) visando à obtenção de propriedades superiores ao PS. As misturas de poliestireno/composto de borracha reciclada foram preparadas em uma extrusora de rosca dupla corrotacional, com adição de agente compatibilizante e, posteriormente, os grânulos extrusados foram moldados por injeção. Estas foram caracterizadas por ensaio mecânico de tração, análise térmica-dinâmico-mecânica (DMTA), temperatura de deflexão térmica (HDT) e microscopia eletrônica de varredura (MEV). Observou-se que não houve perdas significativas da HDT e da resistência à tração. O ensaio de DMTA evidencia a presença de dois picos de transição distintos, um referente a Tg do PS e o outro referente a Tg do polibutadieno (PB). A morfologia ilustrou uma redução da quantidade de vazios e do tamanho das partículas quando a mistura foi compatibilizada com 5% de SBS. As misturas de PS/SBR são uma alternativa para o reaproveitamento dos resíduos de calçados, bem como, uma forma de agregar valor a um material que seria descartado. Palavras-chave:Misturas poliméricas, resíduos de borracha, compatibilizante, propriedades. __________________________________________________________________________________________ ABSTRACTThe combination of polymer is an alternative to obtain materials with properties that, in general, are not found in a single material. The goal of this work was to produce polymer blend with polystyrene (PS) as a matrix and recycled rubber compound (SBR) as a minor phase, in order to obtain superior properties to PS. The combination of polystyrene/ composed recycled rubber was prepared in a double screw corrotational extruder and, subsequently, the extruded pellets were molded by injection. These were characterized by mechanical tests, dynamic mechanical thermal analysis (DMTA), heat deflection temperature (HDT) and scanning electron microscopy (SEM). It was observed that there was no significant loss in HDT and on tensile strength. The DMTA tests showed the presence of two peaks transition, a reference to the PS Tg and another regarding the Tg of PB. The morphology showed a reduction in the quantity of voids and in the size of the particles when the mixture was compatibilized with 5% SBS. The PS/SBR blends are an alternative to the reuse of footwear wastes, as well as to add value to a material that would be discarded.

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Application of percolation model on the brittle to ductile transition for polystyrene and polyolefin elastomer blends

Cited by 12 publications

References 34 publications

Assessment of compatibilization role of nanoclay in immiscible polystyrene/ethylene–octene copolymer blends via wide‐angle X‐ray scattering, microstructure, rheological analyses, and mechanical properties

Assessment of compatibilization role of nanoclay in immiscible polystyrene/ethylene–octene copolymer blends via wide‐angle X‐ray scattering, microstructure, rheological analyses, and mechanical properties

Polylactide-Based Wood Plastic Composites Toughened with SBS

Estudo do Comportamento Mecânico, Termomecânico e Morfológico de Misturas de Poliestireno/Composto de Borracha Reciclada (SBR)

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