The influence of methanol transport on the measured fracture toughness of poly(methyl methacrylate)

The poly(methyl methacrylate)/silica nano-composite made from trimethoxysilyl functionalized poly(methyl methacrylate) and dimethyl diethoxysilane was newly prepared and its apatite-forming ability and mechanical properties were evaluated comparing to poly(methyl methacrylate)/silica nano-composite made from trimethoxysilyl functionalized poly(methyl methacrylate) and tetraethyl orthosilicate. Its apatite-forming ability was similar to that of poly(methyl methacrylate)/silica nano-composite using tetraethyl orthosilicate but its fracture toughness was much improved. Its high fracture toughness might come from the less quantity of siloxane linkages in its structure because dimethyl diethoxysilane had only two ethoxysilane groups while tetraethyl orthosilicate had four ethoxysilane groups. From the results, it can be concluded that it has a possibility to be used as bioactive bone cement.

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The effect of the loading rate on the fracture toughness of Poly(methyl methacrylate), Polyacetal, Polyetheretherketone and modified PVC

Journal of Materials Science ◽

10.1007/bf00356577 ◽

1994 ◽

Vol 29 (1) ◽

pp. 91-98 ◽

Cited By ~ 21

Author(s):

Ph. Beguelin ◽

H. H. Kausch

Keyword(s):

Fracture Toughness ◽

Methyl Methacrylate ◽

Loading Rate ◽

Poly Methyl Methacrylate

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AE characteristics and fracture toughness of glass-filled poly(methyl methacrylate).

KOBUNSHI RONBUNSHU ◽

10.1295/koron.45.683 ◽

1988 ◽

Vol 45 (9) ◽

pp. 683-690 ◽

Cited By ~ 4

Author(s):

Ikuo NARISAWA

Keyword(s):

Fracture Toughness ◽

Methyl Methacrylate ◽

Poly Methyl Methacrylate

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Fracture Toughness of Poly (Methyl Methacrylate)/Hydroxyapatite Denture Base Composite: Effect of Planetary Ball Milling Mixing Time

Journal of Physical Science ◽

10.21315/jps2021.32.3.8 ◽

2021 ◽

Vol 32 (3) ◽

pp. 103-116

Author(s):

Jamal Moammar Aldabib ◽

◽

Zainal Arifin Mohd Ishak ◽

Keyword(s):

Fracture Toughness ◽

Methyl Methacrylate ◽

Ball Milling ◽

Mixing Time ◽

Ceramic Powder ◽

Denture Base ◽

Composite Effect ◽

Poly Methyl Methacrylate ◽

Planetary Ball Milling ◽

Milling Method

Hydroxyapatite (HA) has great potential as a reinforcing filler for poly (methyl methacrylate) (PMMA) denture base materials. Nevertheless, filler particles need to be homogeneously distributed throughout the PMMA particles to get the maximum benefit from using the filler. Therefore, the physical mixing of the powder components (PMMA and the filler) is strongly preferred to provide the required dispersion of the filler in the matrix. However, conventional techniques that have been tried, such as hand mixing and stirrer mixing techniques, were not effective. Therefore, the current study was designed to experimentally investigate the effect of different mixing times on the fracture toughness of PMMA/HA using a developed ball milling method. In this study, heat cured PMMA reinforced with 15 wt% HA ceramic powder was ground for different times (i.e., 10, 20, 30, and 40 min) via the technique of planetary ball milling (PBM). The ground powder mixtures were used for the fabrication of denture base testing samples. The particle size and distribution of the PMMA/HA composites after milling for several times were determined by the laser light scattering technique. The X-ray diffraction (XRD) patterns of the PMMA/HA composites were obtained. However, no new phase was observed. The effects of mixing time using the PBM technique on the fracture toughness were investigated. The effect of mixing time on the microporosity (voids) on the fractured surface of PMMA/HA was studied with field emission scanning electron microscopy (FESEM). Within the limitation of the current study, 30 min is considered the optimum mixing time for the tested PMMA/HA composite.

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Effect of nano- and micro-alumina fillers on some properties of poly(methyl methacrylate) denture base composites

Journal of the Serbian Chemical Society ◽

10.2298/jsc170118056k ◽

2018 ◽

Vol 83 (1) ◽

pp. 75-91 ◽

Cited By ~ 4

Author(s):

Fathie Kundie ◽

Che Azhari ◽

Zainal Ahmad

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Fracture Toughness ◽

Methyl Methacrylate ◽

Water Absorption ◽

Nano Particles ◽

Nano Composites ◽

Al2o3 Nanoparticles ◽

Denture Base ◽

Poly Methyl Methacrylate

This research investigated the effects of alumina (Al2O3) micro- and nano-particles on poly(methyl methacrylate) (PMMA) denture base. Al2O3 was surface treated using (3-methacryloxypropyl)trimethoxysilane (?-MPS), added to methyl methacrylate (MMA), and mixed with PMMA powder. The filler volume fractions in the micro-composites were 0.5, 1, 2, 5 and 7 wt. %, whereas those in the nano-composites were 0.13, 0.25, 0.5, 1, 2 and 5 wt. %. The treated fillers were examined using Fourier transform infrared spectroscopy (FTIR). The influence of filler size and loading on mechanical properties was studied using fracture toughness and flexural tests. The thermal stability of the PMMA/Al2O3 composites was investigated using thermogravimetric analysis (TGA). In addition, the water absorption and solubility characteristic of the prepared composites was also investigated. The FTIR spectra showed new absorption bands, indicating the occurrence of surface modifications. Both micro- and nanoscale particles showed increased fracture toughness. The maximum value of 2.02 MPa?m1/2 was achieved with the addition of 0.5 wt. % nano-Al2O3, which accounts for a 39 % increase. In contrast to the flexural strength, the flexural modulus improved with increasing filler content. The micro-composites showed higher thermal stability than nano-composites. The water absorption and solubility of the prepared composites were slightly higher than those of the control. The use of low concentrations of Al2O3 nanoparticles may be of considerable interest in future studies to improve the mechanical properties of PMMA denture base.

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Plasma-treated ultra-high-strength polyethylene fibres improved fracture toughness of poly(methyl methacrylate)

Journal of Materials Science Materials in Medicine ◽

10.1007/bf00120128 ◽

1993 ◽

Vol 4 (5) ◽

pp. 481-493 ◽

Cited By ~ 13

Author(s):

D. N. Hild ◽

P. Schwartz

Keyword(s):

Fracture Toughness ◽

Methyl Methacrylate ◽

High Strength ◽

Poly Methyl Methacrylate

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EFFECT OF SILANE COUPLING AGENT CONTENT ON MECHANICAL PROPERTIES OF HYDROXYAPATITE/POLY(METHYL METHACRYLATE) DENTURE BASE COMPOSITE

Journal of Scientific Perspectives ◽

10.26900/jsp.5.1.04 ◽

2021 ◽

pp. 37-45

Author(s):

Jamal Moammar ALDABIB

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Methyl Methacrylate ◽

Coupling Agent ◽

Silane Coupling Agent ◽

Flexural Modulus ◽

Denture Base ◽

Poly Methyl Methacrylate ◽

Silane Coupling ◽

Base Composite

In removable prosthodontics, poly(methyl methacrylate) (PMMA) is the most suitable for the construction of denture bases. Intra-orally, the subjected stress intensity during the function accelerate the fracture of acrylic resin denture bases. Extra-orally, fracture occurs when dentures are accidentally dropped on a hard surface. The aim of the current study was to investigate the effect of coupling agent concentration on the mechanical properties of Hydroxyapatite/Poly(methyl methacrylate) (HA/PMMA) denture base composite. The Hydroxyapatite (HA) treated with four different ratios (i.e. 0, 5, 7 and 10 wt%) of 3-(trimethoxysily) propyl methacrylate (γMPS) silane coupling agent was added into the PMMA matrix. The mechanical performance of the composite was evaluated by conducting fracture toughness, flexural and tensile tests. An improvement of 13.83% and 9.62% in the tensile and flexural strength respectively, was achieved. The tensile and flexural modulus of the composite increased by 19.04% and 12.5% respectively. A significant improvement of 29.26% in the fracture toughness was observed at 10 wt% of γ-MPS. 10 wt% of γ-MPS is the optimum amount of coupling agent for obtaining balanced mechanical properties.

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