Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure

Ballesteros, Alberto; Laguna‐Gutiérrez, Ester; Puertas, María Luisa; Esteban‐Cubillo, Antonio; Santarén, Julio; Rodríguez‐Pérez, Miguel Ángel

doi:10.1016/j.mtcomm.2021.102850

Materials Today Communications

2021

DOI: 10.1016/j.mtcomm.2021.102850

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Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure

Alberto Ballesteros¹,

Ester Laguna‐Gutiérrez²,

María Luisa Puertas³

et al.

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Cited by 4 publications

References 57 publications

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Effect of calcium silicate on foaming and anti‐shrinkage behavior of thermoplastic polyamide elastomers: Revelation of the open‐cell mechanism

Ma,

Zhai,

Zhao

et al. 2024

J of Applied Polymer Sci

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Thermoplastic polyamide elastomer (TPAE)/calcium silicate (CaSiO3) open‐cell foam with low shrinkage and high expansion ratio was prepared by using supercritical CO2 as a blowing agent. Adding CaSiO3 led to increased melt viscoelasticity and reduced crystallinity of TPAE. The primary mechanism of CaSiO3 promoting TPAE foam to form the open‐cell structure was discussed. The interaction between CaSiO3 and TPAE is fragile, making CaSiO3 easy to fall off the cell wall and form the open‐cell structure during foaming process. The increasing CaSiO3 content leads to increased cell density and thinned cell walls, thus increasing the tensile stress on cell wall. On the other hand, the agglomeration of CaSiO3 increases particle size, making it easier to fall off from the adhesion of TPAE matrix. The two aspects work together to improve the open‐cell content of TPAE foam up to 93.28%. The open‐cell structure is conducive to increasing the gas exchange rate and significantly decreasing foam shrinkage ratio. Finally, TPAE foam with a shrinkage ratio of only 2.68% and an expansion ratio of 18.77 times was obtained. In addition, open‐cell structure improves the adsorption performance of TPAE/CaSiO3 foam by 500%.

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Effect of calcium silicate on foaming and anti‐shrinkage behavior of thermoplastic polyamide elastomers: Revelation of the open‐cell mechanism

Ma,

Zhai,

Zhao

et al. 2024

J of Applied Polymer Sci

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Anisotropic nucleation and compatibilization of SiO2@PS Janus particles on expandable polystyrene

Chi

Lin

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Preparation, characterization and thermal properties of the PS+Si based polymer nanocomposites

Shirinova,

Surkhayli,

Pashayev

et al. 2024

Journal of Thermoplastic Composite Materials

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Polymer nanocomposites based on polystyrene and polycrystalline Si nanoparticles have been successfully synthesized using the solution-casting method. The scanning electron microscope and x-ray diffraction methods show that the Si nanoparticle size in the obtained nanocomposite was up to 50 nm. The thermostability of the obtained nanocomposite was studied depending on the concentration of Si nanoparticles in the PS matrix. It was found that Si nanoparticles that are distributed homogeneously in the polymer matrix act as a thermal barrier. By adding 3% Si nanoparticles into polystyrene polymer, the thermal degradation temperature of PS increases by 20°, and the decomposition rate reduces from −42,460 mg/min to −35,099 mg/min. In addition, it was shown that Si nanoparticles do not affect the PS glass transition temperature, which explains that the porous Si does not reduce the free volume for the polymer molecules to move. The polymer macromolecules just are adsorbed on the porous silicon surface, which partially limits their mobility.

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Polystyrene/sepiolites nanocomposite foams: Relationship between composition, particle dispersion, extensional rheology, and cellular structure

Cited by 4 publications

References 57 publications

Effect of calcium silicate on foaming and anti‐shrinkage behavior of thermoplastic polyamide elastomers: Revelation of the open‐cell mechanism

Effect of calcium silicate on foaming and anti‐shrinkage behavior of thermoplastic polyamide elastomers: Revelation of the open‐cell mechanism

Anisotropic nucleation and compatibilization of SiO2@PS Janus particles on expandable polystyrene

Preparation, characterization and thermal properties of the PS+Si based polymer nanocomposites

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