The change of the properties of acrylic-based polyurethane via addition of nano-silica

Zhou, Shuxue; Wu, Limin; Sun, Jian; Shen, Weidian

doi:10.1016/s0300-9440(02)00085-1

Cited by 301 publications

(131 citation statements)

References 6 publications

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“…In the sample preparation process the unsaturated [4] polyester and the styrene were mixed in a ratio 100:25 parts by weight respectively. Additionally methyl ethyl ketone peroxide was used as a catalyst, BC500 as an inhibitor; zinc stearate as stabilizer; magnesium oxide as a thickening paste; viscosity reducer and pigment were added and all were mixed for 10 min.…”

Section: Materials and Preparation Of Composite Materialsmentioning

confidence: 99%

“…Having said that in composites technology, in which particulate fillers such as CaCO 3 , glass fiber and carbon black are added into the polymers, may provide a good method to improve their stiffness, modulus and to reduce costs [3][4][5]. Fillers affect the tensile properties according to their packing characteristics, size and interfacial bonding [6].…”

Section: Introductionmentioning

confidence: 99%

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Study of the strength and erosive behavior of CaCO3/glass fiber reinforced polyester composite

Yılmaz¹,

Ünal²,

Mimaroğlu³

2008

Express Polym. Lett.

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Abstract. In this study, the strength and erosive characteristics of CaCO3 filled unsaturated polyester/glass fiber (UPR/GFR) composite are evaluated. Samples of UPR with 40, 50 and 60 wt% content of CaCO3 and different CaCO3 particle sizes of 1, 2, 3, 5 and 10 micron were prepared and tested under tensile loading, indentation and erosion conditions. The tensile strength, hardness and erosion wear rate of unsaturated polyester/glass fiber (UPR composite)/CaCO3 composite were obtained and evaluated. The results showed that the higher is the percentage of CaCO3 in the composite and the smaller is the CaCO3 particle size, the higher is the strength and the erosive resistance of the glass fiber reinforced/unsaturated polyester composite (UPR-GFR). Furthermore, the highest erosion wear rate is at 90° impingement angle. Finally the results show that the erosive wear of CaCO3 content UPR/GFR composite in a brittle manner.

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Section: Materials and Preparation Of Composite Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the strength and erosive behavior of CaCO3/glass fiber reinforced polyester composite

Yılmaz¹,

Ünal²,

Mimaroğlu³

2008

Express Polym. Lett.

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“…There are a large number of reports indicating that the anticorrosion properties of the polyurethane coatings can be markedly improved in the presence of nanoparticles. [9][10][11][12][13][14][15][16] Titanium oxide is highly corrosion resistant and provides a barrier protection which is stable over a wide pH range. It is not classified as dangerous for human health and for environment.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Investigation into the Effect of Nano-Titania on the Protective Properties of Epoxy Coatings on Mild Steel in Natural Seawater

Raj¹

2017

IPCSE

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The effect of introducing nano-tinania (TiO 2 ) particles to the epoxy coatings on mild steel in natural seawater was analyzed using Scanning Electrochemical Microscopy (SECM) and Electrochemical Impedance Spectroscopy (EIS). Line profile and topographic image analysis were measured by applying -0.70 V and +0.60 V as the tip potential for the cathodic and anodic reactions, respectively. The tip current at -0.70 V for the epoxy coated sample with TiO 2 nanoparticles decreased rapidly due to cathodic reduction of dissolved oxygen. The EIS measurements were conducted in natural seawater after wet and dry cyclic corrosion test. The EIS measured the film resistance (R f ) and charge transfer resistance (R ct ) values which were increased by the addition of TiO 2 nanoparticles in the epoxy coating. SEM/EDX and FIB-TEM analysis showed that complex oxides of titania were enriched in corrosion products at the scratched area of the coated steel and confirmed the presence of the nanoscale oxide layers of titania in the rust of the steel. The formation of complex oxides of titania had a beneficial effect on the corrosion resistance of coated steel. Keywords Electrochemical investigation into the effect of nano-titania on the protective properties of epoxy coatings on mild steel in natural seawater 144Copyright: ©2017 Raj et al. Nanoparticles, owing to high specific surface area and small particle size, can enhance the corrosion resistance of the organic coatings by increasing the electrolyte pathways length. Inclusion of metal nanoparticles to the organic coating provides cathodic protection to the underlying substrate. They also provide barrier and passive protection by generating oxides at a later stage. The importance of nanomaterials compared to conventional micro sized pigments is mainly due to their small size and large specific surface area. The decrease in size of the particles causes mechanical properties enhancement of the coating. There are a large number of reports indicating that the anticorrosion properties of the polyurethane coatings can be markedly improved in the presence of nanoparticles. Citation9-16 Titanium oxide is highly corrosion resistant and provides a barrier protection which is stable over a wide pH range. It is not classified as dangerous for human health and for environment. This has shown interest in using titanium oxide in organic coatings in the corrosion protection of steel. SECM has been introduced to evaluate the localized corrosion process, since it provides electrochemical activity and topographic information about the surface reactions at the micrometer scale in aqueous environments. [17][18][19][20][21] The application of SECM has facilitated experiments on the solid/liquid interface because of its high spatial resolution and electrochemical sensitivity.In this study, SECM was used primarily to evaluate the effect of TiO 2 nanoparticles on the corrosion protection performance of an epoxy coating over mild steel in natural seawater. The tip current was detected during the cor...

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“…Organic-inorganic hybrid materials have been extensively studied recently since these materials exhibit the combined characteristics of organic polymer (e.g., flexibility, ductility, dielectric property) and inorganic materials (e.g., rigidity, high thermal stability, strength, hardness, high refractive index) [1][2][3][4][5][6][7]. The properties of hybrid materials could be tailored through the adjustment of functionality or segment size of each component.…”

Section: Introductionmentioning

confidence: 99%

“…Reinforcing of polymer is usually achieved in polymer composites by adding reinforcement such as fibers and particles to the polymer matrix, and some interesting results have been reported using polymer-clay nanocomposites [21], polymer-polyhedral oligomeric silsesquioxane nanocomposites [22], and organic-inorganic hybrids [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Generally, there are two typical kinds of organic-inorganic nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

Lin¹,

Yang

Wang³

et al. 2012

Express Polym. Lett.

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Abstract. Hybrid thin films containing nano-sized inorganic domains were synthesized from UV-curable acrylate-modified waterborne polyurethane (WPU-AC) and monodispersed colloidal silica with coupling agent. The coupling agent, 3-(trimethoxysilyl)propyl methacrylate (MSMA), was bonded onto colloidal silica first, and then mixed with WPU-AC to form a precursor solution. This precursor was spin coated, dried and UV-cured to generate the hybrid films. The silica content in the hybrid thin films was varied from 0 to 30 wt%. Experimental results showed the aggregation of silica particles in the hybrid films. Thus, the silica domain in the hybrid films was varied from 30 to 50 nm by the different ratios of MSMAsilica to WPU-AC. The prepared hybrid films from the crosslinked WPU-AC/MSMA-silica showed much better thermal stability and mechanical properties than pure WPU-AC.

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The change of the properties of acrylic-based polyurethane via addition of nano-silica

Cited by 301 publications

References 6 publications

Study of the strength and erosive behavior of CaCO3/glass fiber reinforced polyester composite

Study of the strength and erosive behavior of CaCO3/glass fiber reinforced polyester composite

Electrochemical Investigation into the Effect of Nano-Titania on the Protective Properties of Epoxy Coatings on Mild Steel in Natural Seawater

Hybrid thin films derived from UV-curable acrylate-modified waterborne polyurethane and monodispersed colloidal silica

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