Investigation of the fracture mechanism and mechanical properties of polystyrene/silica nanocomposite in various silica contents

Vaziri, Hossein Salehi; Abadyan, Mohamadreza; Nouri, Meisam; Omaraei, Iraj Amiri; Sadredini, Zahra; Ebrahimnia, Mohamad

doi:10.1007/s10853-011-5513-9

Cited by 44 publications

(11 citation statements)

References 53 publications

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“…The debonding process is the separation of the PMMA/ZIF-8-LC-LGD nanoparticles from the PMMA matrix during deformation. For inherently ductile polymers, such as polyethylene, debonding is an important mechanism in enhancing fracture toughness of particulate-filled polymers because it allows for ductile voiding and ligament stretching . For notch-sensitive and semiductile polymers, a cavitational process to transform the crack-tip stress state from plane strain condition to a plane stress condition is required for matrix shear yielding to take place.…”

Section: Resultsmentioning

confidence: 99%

“…For inherently ductile polymers, such as polyethylene, debonding is an important mechanism in enhancing fracture toughness of particulate-filled polymers because it allows for ductile voiding and ligament stretching. 57 For notch-sensitive and semiductile polymers, a cavitational process to transform the crack-tip stress state from plane strain condition to a plane stress condition is required for matrix shear yielding to take place. If rigid toughening particles are chosen for toughening but unable to undergo internal cavitation like rubber particles, interfacial debonding becomes a required mechanism to promote shear banding in a polymer matrix.…”

Section: ■ Introductionmentioning

confidence: 99%

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Manipulation of Fracture Behavior of Poly(methyl methacrylate) Nanocomposites by Interfacial Design of a Metal–Organic-Framework Nanoparticle Toughener

et al. 2020

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The interfacial region between nanoparticles and polymer matrix plays a critical role in influencing the mechanical behavior of polymer nanocomposites. In this work, a set of model systems based on poly(methyl methacrylate) (PMMA) matrix containing poly(alkyl glycidyl ether) brushes grafted on 50 nm metal–organic-framework (MOF) nanoparticles were synthesized and investigated. By systematically increasing the polymer brush length and graft density on the MOF nanoparticles, the fracture behavior of PMMA/MOF nanocomposite changes from forming only a few large crazes to generating massive crazing and to undergoing shear banding, which results in significant improvement in fracture toughness. The implication of the present finding for the interfacial design of the nanoparticles for the development of high-performance, multifunctional polymer nanocomposites is discussed.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Manipulation of Fracture Behavior of Poly(methyl methacrylate) Nanocomposites by Interfacial Design of a Metal–Organic-Framework Nanoparticle Toughener

et al. 2020

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“…A significant effort has been made to characterize the structural and dynamic properties of the interfacial layer in PNCs − that is formed in the vicinity of nanoparticles and has thickness of several nanometers. Furthermore, it was shown that the mechanical moduli (fracture toughness, Young’s modulus, tensile strength, and shear strength) in PNCs are affected by a number of parameters , such as interactions between the fillers and the polymers that determine dispersion, ,− methods of PNC preparation (e.g., grafting vs physical adsorption), ,− sizes and shapes of NPs, − polymer rigidity, and molecular weight (MW) , that directly affect the nanoscale properties of the interfacial layer. The majority of reported studies exploring the direct correlation between the interfacial layer and the mechanical reinforcement have involved PNCs in the melt state.…”

Section: Introductionmentioning

confidence: 99%

Addition of Short Polymer Chains Mechanically Reinforces Glassy Poly(2-vinylpyridine)–Silica Nanoparticle Nanocomposites

Bocharova

Genix

Carrillo

et al. 2020

ACS Appl. Nano Mater.

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The addition of hard fillers to a polymer matrix is a well-known process for achieving mechanical reinforcement. With a decrease in the size of the fillers, the contribution from polymer–particle nanometer-sized interfaces becomes significant, and these interfaces affect the mechanical performance of polymer nanocomposites (PNCs) beyond the limits established for conventional composites. However, the molecular mechanisms underlying the improvement in the mechanical performance of glassy PNCs remain unresolved, necessitating a deeper understanding of the structure–property relationships in these intrinsically heterogeneous systems. In this effort, by using Brillouin light scattering (BLS) and dynamic mechanical analysis (DMA), we demonstrated that adding shorter chains to a PNC prepared with high molecular weight polymers significantly improved the mechanical properties of the PNC in the glassy state. The strongest enhancement of mechanical properties occurred at an optimum concentration of short chains. This is in contrast to the behavior of the glass transition temperature of PNCs which shows a monotonic decrease with an increase in the concentration of shorter chains. Using experimental data and coarse-grained molecular dynamics (MD) simulations, we have identified the molecular mechanism leading to the observed nonmonotonic changes in mechanical reinforcement. This mechanism includes changes in the nanoscale organization at the interface combined with chain stretching amplified by the addition of the short chains. Overall, our approach paves a simple and cost-effective pathway to fabricating glassy PNCs with significantly improved mechanical properties that will fill various practical needs.

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“…Primeramente se modificó la superficie del ps y psr con un grupo hidrofóbico, con el fin de mejorar las características hidrófobas del polímero. Asimismo, se incorporaron nanopartículas de sílice en el ps y psr funcionalizado (psf y psrf), combinando las características del poliestireno y de la sílice a través del proceso sol-gel (Hossein et al, 2011;Zou et al, 2008;Hernández-Padrón et al, 2003), lo que promete un mejor desempeño hidrofóbico del recubrimiento. En trabajos anteriores se han observado propiedades de alta resistencia termo-mecánica, y anticorrosión en sustratos metálicos (Hernández-Padrón et al, 2010, 2015.…”

Section: Introductionunclassified

Estudio De La Citoxicidad De Películas Nanohíbridas Con Matriz De Poliestireno Reciclado

Blanco-Hernández

Contreras

Díaz

et al. 2018

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<p>En este trabajo se desarrollaron películas híbridas, adaptando el proceso sol-gel con un adecuado control en el diseño de las condiciones experimentales para poder incorporar nanopartículas de sílice a una matriz polimérica de poliestireno reciclado (PSR). Para una mejor incorporación entre la sílice y el PSR fue necesario funcionalizar el PSR con grupos carboxilo de ácido abiético.</p><p>El PSR usado para la preparación de películas nanohíbridas se obtuvo de productos de empaques de comida rápida, y fue evaluada la citoxicidad de las películas sin sustrato, mostrando la viabilidad de ser usadas como películas protectoras en sustrato de vidrio ya que no presentan riesgo para la salud. Los materiales híbridos fueron caracterizados por las espectroscopias Infrarrojo y Raman, y evaluadas sus propiedades mecánicas y térmicas. La temperatura de transición vítrea se incrementó para los HPS-F and HPSR-F por la presencia del ácido abiético y la sílice. Todos los materiales incrementan su ángulo de contacto comparado con el del sustrato sin recubrir y mayor repelencia al agua. La incorporación de partículas de sílice dentro de la matriz polimérica da por resultado interesantes propiedades comparadas con sus análogas hechas con poliestireno comercial (PS), obteniendo resultados satisfactorios permitiendo así su aplicación como recubrimientos en sustratos de vidrio con propiedades de autolimpieza y protección a la radiación UVA que son de gran relevancia tecnológica.</p>

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Investigation of the fracture mechanism and mechanical properties of polystyrene/silica nanocomposite in various silica contents

Cited by 44 publications

References 53 publications

Manipulation of Fracture Behavior of Poly(methyl methacrylate) Nanocomposites by Interfacial Design of a Metal–Organic-Framework Nanoparticle Toughener

Manipulation of Fracture Behavior of Poly(methyl methacrylate) Nanocomposites by Interfacial Design of a Metal–Organic-Framework Nanoparticle Toughener

Addition of Short Polymer Chains Mechanically Reinforces Glassy Poly(2-vinylpyridine)–Silica Nanoparticle Nanocomposites

Estudio De La Citoxicidad De Películas Nanohíbridas Con Matriz De Poliestireno Reciclado

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