Flexural Properties of Hydroxyapatite Reinforced Poly(Methyl Methacrylate) Composites

Shyang, Chow Wen; Khim, Loo Yok; Ariffin, A.; Arifin, Zainal; Ishak, Mohd

doi:10.1177/0731684407086506

Cited by 36 publications

(15 citation statements)

References 8 publications

(12 reference statements)

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“…Zebarjad et al [11] studied the mechanical properties of nano HA-reinforced PMMA cement were by using three point bending, compressive and wear test and concluded that there was no direct proportionality between the results of bending tests and the HA content and the addition of HA to PMMA (up to 10 wt%) did not change the bending properties significantly. Similar observation was reported by Chow Wen et al [12] who studied the flexural properties of hydroxyapatite reinforced poly(Methyl methacrylate) composites. It was found that the flexural strength and strain decreased in the presence of HA.…”

Section: Introductionsupporting

confidence: 87%

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Aldabib¹,

Ishak

2020

SN Appl. Sci.

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Poly (methyl methacrylate) or PMMA is an acrylic material has been used widely as a denture base material. The denture base is subjected to various stresses during the function, these include tensile and flexural stresses. The current study was aimed to experimentally evaluate the effect of different filler concentrations on physical and mechanical characteristics of PMMA/HA composite. PMMA reinforced with different ratios (i.e. 0, 5, 10, and 15 wt%) of silane treated HA were prepared to study the effect of HA concentration on the mechanical properties of acrylic denture base material. Tensile, flexural and fracture toughness tests were conducted to evaluate the mechanical performance. The fracture surfaces of all the composites were studied using scanning electron microscopy. The hardness of the composite was investigated using Vickers hardness. Independent t-test was also conducted to evaluate the significant difference in the values measured as a function of different filler loading. Data analyses showed a significant improvement (P < 0.05) in the tensile and flexural modulus of the composite 26% and 27.3% respectively, as a result of increasing the HA loading to 15 wt%. However, no significant difference (P > 0.05) was detected in the tensile and flexural strength as function of HA incorporation. A small increment of only 1.63% and 3% in the tensile and flexural strength respectively, was achieved at very low filler loading i.e. 5 wt%. An improvement of only 7.8% in the surface hardness was observed for PMMA loaded with 15 wt% of HA.

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Section: Introductionsupporting

confidence: 87%

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Aldabib¹,

Ishak

2020

SN Appl. Sci.

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“…It is interesting to note that the degree of crystallinity of PBT increased in the presence of OMMT. This is attributed to the nucleation effects of OMMT resulting in the improvement, in the crystal perfection of PBT 79 . A similar observation was reported by Mohd Ishak et al, for the injection moulded short glass fiber reinforced PBT composites 80 .…”

Section: 1 Effect Of Loading Clay With Pbt-pc 80-20 Blendmentioning

confidence: 99%

Mechanical, Thermal and Morphological Behaviours of Polybutylene Terephthalate/Polycarbonate Blend Nanocomposites

Rajakumar¹,

Nanthini²

2013

ILCPA

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Polybutylene Terephthalate (PBT) / Polycarbonate (PC) nanocomposite blend was fabricated using melt blending technique in a twin extruder. The blend composition was optimized at PBT-PC weight ratio of 80-20. The effect of incorporation of various organically modified Montmorillonite (OMMT) and naturally occurring sodium Montmorillonite (MMT) on the mechanical, thermal and morphological properties of the nanocomposites blend has been investigated. It was observed that the Izod impact strength, tensile strength and flexural strength demonstrated a significant increase with the increase in clay loading from 1-7 weight % due to homogeneous dispersion of clay within the blend matrix. Thermo gravimetric analysis (TGA) revealed an increase in thermal stability of the blend with the incorporation of nanoclay. There is also decrease in the melting temperature (Tm) and crystallisation temperature (Tc) as observed from DSC thermograms. DMA add the evidence for TGA, DSC and mechanical results. PBT -PC blend with clay exhibited featureless XRD indicative of exfoliated structure. TEM micrographs also confirm the same that the clay has exfoliated into individual layers.

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“…Whereas, when adding12% Pistachio Shell powder of average particle size of about (150µm) to PMMA led to increasing in Tg value of PMMA composites to 123.8℃ as shown in figure (9). Furthermore, the DSC scans of PMMA composite specimens were reinforced with Pistachio Shell powder of different average particle size in the PMMA matrix showed an increase of (Tg), due to the nature of natural powders (Pistachio Shell), which is acting as an agent caused restriction and limited in the PMMA chain mobility, Finally, that leads to increase the molten state viscosity and rise the glass transition temperature for all composite specimens, [Carola Esposito Corcione 2012, Chow Wen Shyang. et.…”

Section: Dsc Testmentioning

confidence: 99%

f INFLUENCE OF PISTACHIO SHELL POWDER REINFORCEMENT ON FTIR AND DSC BEHAVIOR OF PMMA ACRYLIC RESIN

Oleiwi¹

2020

IQJMME

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Although, the PMMA have good advantages made it appropriate to denture base applications. But its low impact and fracture strength represent the main drawbacks of it.so many studies had been done in order to overcome these problems. In this study Pistachio Shell powder was added in different weight fractions of about (3, 6, 9 and 12 wt. %) and different average particle sizes of about (53µm, 106µm, 150µm and212µm) to (heat-cure) PMMA that is popularly utilize in denture base applications and study the Fourier transform infrared spectroscopy (FTIR) and Differential Scanning Calorimeter (DSC) behavior of this bio composite. The results were as the following: the FTIR results demonstrated that there are no new peaks appeared after the reinforcing by Pistachio Shell powder. Also there was no shifting in any of these peaks. While the DSC test showed that the glass transition temperature (Tg) increased as the particle size of Pistachio Shell powder increased. The highest value of Tg (126.9?) was obtained for composite specimen reinforced with 12% of Pistachio Shell powder with average particle size of about (212µm).

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Flexural Properties of Hydroxyapatite Reinforced Poly(Methyl Methacrylate) Composites

Cited by 36 publications

References 8 publications

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Effect of hydroxyapatite filler concentration on mechanical properties of poly (methyl methacrylate) denture base

Mechanical, Thermal and Morphological Behaviours of Polybutylene Terephthalate/Polycarbonate Blend Nanocomposites

f INFLUENCE OF PISTACHIO SHELL POWDER REINFORCEMENT ON FTIR AND DSC BEHAVIOR OF PMMA ACRYLIC RESIN

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