Kinetics and temperature evolution during the bulk polymerization of methyl methacrylate for vacuum-assisted resin transfer molding

Suzuki, Yasuhito; Cousins, Dylan S.; Wassgren, Jerred; Kappes, Branden B.; Dorgan, John R.; Stebner, Aaron P.

doi:10.1016/j.compositesa.2017.10.022

Cited by 35 publications

(37 citation statements)

References 28 publications

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“…38 Moreover, higher intensity causes an increase of temperature in the reacting environment. 39−42 Suzuki et al 42 have demonstrated that the temperature increases dramatically (40 °C) during the polymerization of methyl methacrylate resins. Tripathy et al 41 have studied the effect of light intensity on the photopolymerization of (meth)acrylate systems.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Ultraviolet-Cured Methacrylate Networks: From Photopolymerization to Ultimate Mechanical Properties

Anastasio¹,

Peerbooms

Cardinaels

et al. 2019

Macromolecules

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In this study, the effect of different process conditions on the material properties of a single UV-cured layer of methacrylate resin, typically used in the stereolithography (SLA) process, is assessed. This simplified approach of the SLA process gives the opportunity to study the link between process conditions and mechanical properties without complicated interactions between different layers. Fourier-transform infrared analysis is performed to study the effect of light intensity, curing time, and initiator concentration on the monomer conversion. A model is developed based on the reaction kinetics of photopolymerization that describes and predicts the experimental data. The effect of curing time and light intensity on the glass-transition temperature is studied. A unique relation exists between conversion and glass-transition temperature, independent of the light intensity and curing time. Tensile tests on UV-cured resin show an increase in yield stress with increasing curing time and a linear relation between glass-transition temperature and yield stress. However, a lower light intensity leads to a different network structure characterized by a lower yield stress and glass-transition temperature. The correlations between process conditions and the mechanical properties of UV-cured methacrylate systems are established to better understand the role of the processing parameters involved in the SLA process.

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Section: Resultsmentioning

confidence: 99%

Characterization of Ultraviolet-Cured Methacrylate Networks: From Photopolymerization to Ultimate Mechanical Properties

Anastasio¹,

Peerbooms

Cardinaels

et al. 2019

Macromolecules

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show abstract

“…Este proceso proporciona un alto refuerzo, una mejor adherencia entre los componentes del compuesto y mayor control del porcentaje de volumen de fibra en comparación con los procesos manuales (Kar, 2017). En el campo de los polímeros ya se ha empleado procesos de moldeo asistidos por vacío en los que se mejora significativamente la concentración del polímero en el proceso (Suzuki et al, 2017). En el procesamiento de materiales compuestos con una base de fibras de carbono, a diferentes disposiciones, se ha conseguido mejoras en las propiedades mecánicas; los porcentajes de mejora catalogados tiene un valor significativo (Muralidhara et al, 2019).…”

Section: Introductionunclassified

Ensayos experimentales y análisis numérico de la estructura del material compuesto alternativo para la reparación de superficies de vuelo en aeronaves

et al. 2021

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En la actualidad, los materiales compuestos de matriz polimérica son utilizados en múltiples aplicaciones, una de las áreas más importantes de aplicación es en el sector aeronáutico, debido a la relativamente baja densidad que tienen los materiales combinados. Estos compuestos tienen buenas propiedades mecánicas, comparables con materiales metálicos, pero que aportan beneficios adicionales. El objetivo de este trabajo es hacer los ensayos experimentales y el análisis numérico de la estructura del material compuesto alternativo para emplearlos en la reparación de las superficies de vuelo de aeronaves del CIDFAE. Se manejó un proceso ampliamente extendido de envasado al vacío (vacuum bagging) para obtener un compuesto más homogéneo, Lo que redujo los defectos en el procesamiento, y controló mejor la fracción de las fibras y el espesor global del compuesto. Se elaboraron probetas de resina epóxica reforzada con capas de tejido plano de tres fibras distintas de: carbono, vidrio y aramida, en diferentes orientaciones, que fueron ensayadas a tracción, flexión e impacto para determinar sus propiedades mecánicas. Se ha demostrado que los resultados conseguidos mediante la metodología analítica y el método de elementos finitos son aproximados a los resultados que se obtienen con ensayos destructivos. Los resultados experimentales muestran que los valores de resistencia a la tracción son mayores en los materiales de resina epóxica reforzados con 4 capas de fibra de carbono en orientación 0°-90°.

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“…Polymethyl methacrylate (PMMA) is a thermoplastic that is transparent with resistance to UV and has been used in a wide range of fields and applications. PMMA is versatile and is used in automotive, construction, electronics, and medical applications [1][2][3][4][5]. One of the challenges in the preparation of PMMA is the efficiency of conversion [6,7].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Hybrid Iron Oxide Silver Nanoparticles in Methyl Methacrylate Polymerization

2020

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One of the challenges in the preparation of poly(methyl methacrylate) (PMMA) is to develop new catalytic systems with improved efficiency. A hybrid iron oxide silver catalyst holds promise in solving this issue. Catalysts were prepared at room temperature by a two-step technique. First, iron oxide nanoparticles were prepared by the reduction of FeCl3 using sodium borohydride (NaBH4) at room temperature. Second, magnetic nanoparticles doped with a series of Ag nanoparticles (Ag, Ag/3 –amino propyltriethoxysilane (APTES) and Ag/poly(ethyleneimine) (PEI)). The prepared catalysts were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS), scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), and Fourier-transform infrared spectroscopy (FTIR). The catalytic activity of Fe, Ag/Fe, PEI–Ag/Fe, and APTES–Ag/Fe in methyl methacrylate (MMA) polymerization was investigated in the presence of O2, N2, NaHSO3, and benzoyl peroxide in bulk or solution conditions. The produced polymer was characterized by gel permeation chromatography (GPC) and proton nuclear magnetic resonance spectroscopy (1HNMR). The structures of PEI–Ag/Fe and APTES–Ag/Fe are assumed. The conversion efficiency was 100%, 100%, 97.6%, and 99.1% using Fe, Ag/Fe, PEI–Ag/Fe, and APTES–Ag/Fe catalysts at the optimum conditions, respectively. Hybrid iron oxide silver nanoparticles are promising catalysts for PMMA preparation.

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Kinetics and temperature evolution during the bulk polymerization of methyl methacrylate for vacuum-assisted resin transfer molding

Cited by 35 publications

References 28 publications

Characterization of Ultraviolet-Cured Methacrylate Networks: From Photopolymerization to Ultimate Mechanical Properties

Characterization of Ultraviolet-Cured Methacrylate Networks: From Photopolymerization to Ultimate Mechanical Properties

Ensayos experimentales y análisis numérico de la estructura del material compuesto alternativo para la reparación de superficies de vuelo en aeronaves

Catalytic Activity of Hybrid Iron Oxide Silver Nanoparticles in Methyl Methacrylate Polymerization

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