Preparation of scratch and abrasion resistant polymeric nanocomposites by monomer grafting onto nanoparticles, 2 Characterization of radiation-cured polymeric nanocomposites

Gläsel, Hans‐Jürgen; Bauer, Frank; Ernst, H.; Findeisen, Matthias; Hartmann, E.; Langguth, H.; Mehnert, R.; Schubert, Rolf

doi:10.1002/1521-3935(20001201)201:18<2765::aid-macp2765>3.0.co;2-9

Cited by 97 publications

(63 citation statements)

References 3 publications

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“…Thus, in order to Figure 1. 4 Schematic structure of grafted silica nanoparticles and radiation-cured grafted silica/acrylate networks (adapted from reference [41]). …”

Section: Scratch-and Abrasion-resistant Coatingsmentioning

confidence: 99%

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Functional Coatings and Microencapsulation: A General Perspective

Ghosh¹

2006

Functional Coatings

159

130

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Today, many objects that we come across in our daily lives, including the house in which we live and the materials we use (e.g., toothbrushes, pots and pans, refrigerators, televisions, computers, cars, furniture) all come under the "umbrella" of coated materials. Likewise, fields such as military applications -for example, vehicles, artilleries and invisible radars -and aerospace products such as aircraft, satellites and solar panels all involve the widespread use of coated materials. Clearly, the importance of coatings has increased hugely during the modern era of technology.Coating is defined as a material (usually a liquid) which is applied onto a surface and appears as either a continuous or discontinuous film after drying. However, the process of application and the resultant dry film is also regarded as coating [1]. Drying of the liquid coating is mostly carried out by evaporative means or curing (cross-linking) by oxidative, thermal or ultraviolet light and other available methods. Paint can be defined as a dispersion that consists of binder(s), volatile components, pigments and additives (catalyst, driers, f low modifiers) [2]. The binder (polymer or resin) is the component that forms the continuous film, adheres to the substrate, and holds the pigments and fillers in the solid film. The volatile component is the solvent that is used for adjusting the viscosity of the formulation for easy application. Depending on their compositions, paints can be divided into three groups: solvent-borne, water-borne and solvent-free (100% solid). Solvent-borne paints consist of resin, additives and pigments that are dissolved or dispersed in organic solvents. Similarly, in water-borne paints the ingredients are dispersed in water. In solvent-free compositions, the paints do not contain any solvent or water and the ingredients are dispersed directly in the resin.The properties of coating films are determined by the types of binders, pigments and miscellaneous additives used in the formulation. Moreover, types of substrates, substrate pretreatments, application methods and conditions of film formation

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“…Thus, in order to Figure 1. 4 Schematic structure of grafted silica nanoparticles and radiation-cured grafted silica/acrylate networks (adapted from reference [41]). …”

Section: Scratch-and Abrasion-resistant Coatingsmentioning

confidence: 99%

“…Recent advances in nanotechnology plays an important role in the development of scratch-resistant coatings [39,40]. Gläsel et al have shown the use of siloxane-encapsulated SiO 2 nanoparticles to develop scratch-and abrasion-resistant coatings [41,42] (Fig. 1.4).…”

Section: Scratch-and Abrasion-resistant Coatingsmentioning

confidence: 99%

Functional Coatings and Microencapsulation: A General Perspective

Ghosh¹

2006

Functional Coatings

159

130

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“…[17][18][19] The mixture was sonicated for 2 h. The modified silica (A-Silica) was separated using a centrifuge and dried at 50 C under vaccum for 6 h.…”

Section: Surface Modification Of Nano-silicamentioning

confidence: 99%

“…For the modified silica nanoparticles, two additional peaks are found at À57:6 and À68:6 ppm. 18,19 Figure 1c shows a 13 C NMR spectrum of neat APTS (dissolved in CDCl 3 ) and Figure 1d shows a 13 C CP MAS NMR spectrum of A-Silica. In Figure 1d, three peaks were observed around 9.8, 24.5 and 45.9 ppm, which could be assigned to C1 0 , C2 0 and C3 0 .…”

Section: Silanation Of Silicamentioning

confidence: 99%

Isothermal Crystallization of Poly(ethylene-co-glycidyl methacrylate)/Silica Nanocomposites

Huang

Kang²,

Chen

2005

Polym J

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ABSTRACT:-Aminopropyltriethoxysilane was used to modify nano-size silica particles (A-Silica), and silanation was studied by 29 Si and 13 C CP MAS NMR. 3 wt % original silica (Silica) and modified silica (A-Silica) particles were blended with poly(ethylene-co-glycidyl mathacrylate) (PEGMA) in a twin screw extruder. The dispersibility of these nanocomposites was examined by transmission electron microscopy. The equilibrium melting temperature was estimated by linear and nonlinear Hoffman-Weeks relations, and the kinetics of isothermal crystallization were described by Avrami, Tobin, Malkin, and Urbanovici-Segal models. The results showed that PEGMA containing the modified nano-silica gave the highest equilibrium melting temperature and slowest isothermal crystallization rate. The above four kinetic models predicted the same ranking order in crystallization rate: PEGMA > PEGMA/Silica > PEGMA/A-Silica.

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“…Presently, most inorganic fillers are either close to spherical or composed of small platelets [11]. In order to achieve a significant improvement in scratch resistance, nanoparticles are usually added at a weight fraction in the range of 20% or more [12][13][14][15]. While the mechanism by which nanoparticles improve hardness is under debate, it is clear that nanoparticles must make up a significant fraction of the overall volume in order to be mechanically active.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Coatings Reinforced by Halloysite Nanotubes

Nikiforow

Pohl

et al. 2013

Coatings

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Abstract:The pencil hardness of a two-component polyurethane coating was improved by adding halloysite nanotubes to the recipe at a weight fraction of less than 10%. The pencil hardness was around F for the unfilled coating and increased to around 2H upon filling. It was important to silanize the surface of the filler in order to achieve good coupling to the matrix. Sonicating the sample during drying also improved the hardness. Scanning electron micrographs suggest that the nanotubes are always well immersed into the bulk of the film. With a thickness between 10 and 20 µm, the optical clarity was good enough to clearly read letters through the film. The films can be used in applications where transparency is required.

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Preparation of scratch and abrasion resistant polymeric nanocomposites by monomer grafting onto nanoparticles, 2 Characterization of radiation-cured polymeric nanocomposites

Cited by 97 publications

References 3 publications

Functional Coatings and Microencapsulation: A General Perspective

Functional Coatings and Microencapsulation: A General Perspective

Isothermal Crystallization of Poly(ethylene-co-glycidyl methacrylate)/Silica Nanocomposites

Polyurethane Coatings Reinforced by Halloysite Nanotubes

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