Additional Microspheres

Highly uniform 1/4" polystyrene spheres with an etched surface. The surface roughness of 100-120µm promotes better adherence of proteins, etc. for biological applications.

Density = ~1.05 g/cc

Highly uniform 1/4" polypropylene spheres with a smooth surface.

Density = ~0.92 g/cc

Highly uniform 1/16" polyamide (6/6 nylon) spheres with a smooth surface.

Density = ~1.19 g/cc

Highly uniform 1/8" Teflon® PTFE spheres with a smooth surface (chemically resistant).

Density = ~2.14 g/cc

Highly uniform 1/4" polystyrene spheres with an etched surface. The surface roughness of 100-120µm promotes better adherence of proteins, etc. for biological applications.

Density = ~1.05 g/cc

Highly uniform 3/8" hollow polyethylene spheres with a smooth surface.

Density = ~0.53 g/cc

Highly uniform 1/8" polystyrene spheres with an etched surface. The surface roughness of 100-120µm promotes better adherence of proteins, etc. for biological applications.

Density = ~1.05 g/cc

Highly uniform 1/8" polystyrene spheres with an etched surface. The surface roughness of 100-120µm promotes better adherence of proteins, etc. for biological applications.

Density = ~1.05 g/cc

Highly uniform 1/4" polystyrene spheres with a smooth surface.

Density = ~1.05 g/cc

Highly uniform 1/4" Teflon® PTFE spheres with a smooth surface (chemically resistant).

Density = ~2.14 g/cc

Highly uniform 1/4" carboxylate-modified polystyrene spheres with an etched surface (surface roughness of 100-120µm). Biomolecules may be conjugated to surface carboxylate groups via an EDAC-mediated chemistry.

Density = ~1.05 g/cc

Highly uniform 1/8" carboxylate-modified polystyrene spheres with an etched surface (surface roughness of 100-120µm). Biomolecules may be conjugated to surface carboxylate groups via an EDAC-mediated chemistry.

Density = ~1.05 g/cc

Highly uniform 1/4" Blue Dyed Polyballs are easy to visualize and feature surface amine groups that can be used for glutaraldehyde-mediated conjugation of biomolecules. These spheres also have an etched surface with a surface roughness of 100-120µm.

Density = ~1.05 g/cc

Natural biological particles

28µm

85-90µm

12-13µm

This 19-20µm size ragweed pollen is a short type, botanical named Ambrosia artemisiifolia.

It is collected under a vacuum method and exceeds identity and purity by microscopic identification. It contains less than 0.1% contamination with foreign pollens or molds. Plant parts do not exceed 5% for anemophilous (wind pollinated) pollen or 12% for entomophilous (insect pollinated) pollen.

19-20µm

45-52µm

0.2µm Learn More

Spherical Iron Powder
2-3µm

Red Iron Oxide Particles, 0.3-0.8µm Learn More

These are high surface area soda lime glass beads which have been functionalized by reaction with the appropriate organosilane. They are capable of coupling with peptides, dyes, and other compounds, the amine-functional beads as supplied and the glycidyl-functional beads after periodate oxidation. Additional sizes are available on a custom basis.

30-50μm

These are high surface area soda lime glass beads which have been functionalized by reaction with the appropriate organosilane. They are capable of coupling with peptides, dyes, and other compounds, the amine-functional beads as supplied and the glycidyl-functional beads after periodate oxidation. Additional sizes are available on a custom basis.

30-50&#956m   

These particles require far less added dispersant than traditional PTFE particles to form stable dispersions.

Microdispers particles are useful for many applications including coatings, gloss reducers, and coating additives that impact water pickup or surface energy.

With good powder flow properties, these particles are easily compounded in a number of thermoplastic matrices with appropriate heat/shear mixing.

These particles require far less added dispersant than traditional PTFE particles to form stable dispersions.

Microdispers particles are useful for many applications including coatings, gloss reducers, and coating additives that impact water pickup or surface energy.

With good powder flow properties, these particles are easily compounded in a number of thermoplastic matrices with appropriate heat/shear mixing.

Mean Particle Size: 3000nm (<10% of particle size distribution is above 10μm)

Surfactant Demand: Lower than traditional PTFE particles

Surface Area: 2m²/g (BET surface area measurement)

Polytetrafluoroethylene (PTFE) particles provided in dry powder form. These particles require far less added dispersant than traditional PTFE particles to form stable dispersions.

A novel patented class of polytetrafluoroethylene particles, our unique DispersEZ particles have chemically treated surfaces to orient stabilizing polar moieties (both hydroxyl and carboxylic acid groups) to the exterior of the bead. These molecules, which are chemically grafted to the PTFE surface, allow the particles to disperse easily in both aqueous and solvent media without the need for added surfactants or stabilizers that can interfere with desired properties.

Inert polymer.

Nominal diameter: 35µm

Poly(methyl methacrylate) or PMMA is less hydrophobic than polystyrene and should show reduced nonspecific protein and peptide binding. The density of these beads, 1.19 g/cc, is considerably higher than that of polystyrene beads, making them easier to concentrate by centrifugation. The beads are not free of surfactant and contain surface carboxylic acid groups at higher concentration than the standard Polybead Polystyrene Carboxylate Microspheres.

Poly(methyl methacrylate) or PMMA is less hydrophobic than polystyrene and should show reduced nonspecific protein and peptide binding. The density of these beads, 1.19 g/cc, is considerably higher than that of polystyrene beads, making them easier to concentrate by centrifugation. The beads are not free of surfactant and contain surface carboxylic acid groups at higher concentration than the standard Polybead Polystyrene Carboxylate Microspheres.

In many uses of liquid resins, it is desirable to reduce the weight of the finished product. One way to reduce the weight below the original resin weight is to incorporate a suitable additive. Hollow phenolic microspheres are excellent for use in a variety of industrial applications. They are lightweight, chemically inert, and mechanically strong. They can be excellent adhesives, gap filling formulations, sandable putties, syntactic foams, and molded and laminated structures that must be lightweight and strong. About 30% by weight will make most resins unpourable. Filling casting are quite machinable; turns casting brown.

Tough methacrylate resin.

Particle size (D50): 140-220µm

Beads for preparation of crosslinked poly(chloromethylstyrene) Merrifield resins and other functionalized beads.

98:2 200-400 mesh

Widely used polyolefin. Soluble in: chlorinated hydrocarbons, aromatic hydrocarbons, isoamyl acetate.

Chromatographic grade 25-85µm

Poly(methyl methacrylate) or PMMA is less hydrophobic than polystyrene and should show reduced nonspecific protein and peptide binding. The density of these beads, 1.19 g/cc, is considerably higher than that of polystyrene beads, making them easier to concentrate by centrifugation. The beads are not free of surfactant and contain surface carboxylic acid groups at higher concentration than the standard Polybead Polystyrene Carboxylate Microspheres.

These melamine particles are crosslinked by acid-catalyzed reaction with formaldehyde. The particles have a much higher density (1.51 g/cc) than polystyrene, are hydrophilic with amine and methylolamine groups, and, being crosslinked, are not noticeably swelled by organic solvents. The particles can be lyophilized and then redispersed in water. The particles are supplied as a suspension of 2.5% solids in water.

~1.00µm

Widely used polyolefin.

Soluble in: chlorinated hydrocarbons, aromatic hydrocarbons, isoamyl acetate.

Chromatographic grade 150µ

The biomedical advantages of a polystyrene surface are combined with a low effective density in a new class of microspheres. Polybead® Hollow Microspheres are spherical styrene / acrylic beads supplied in suspension. A relatively dense shell of a polystyrene based copolymer is formed around a void in the particle. Sphere voids are water-filled in the as-supplied 5% solids aqueous suspension, and the water-filled particle will have an effective density near 1.0 g/cm³. Water is lost from the void upon drying as the particles are slightly porous. This results in a hollow particle with a shell approximately 0.10µm thick. Surfactants on the surface of the spheres help stabilize the particles.

The biomedical advantages of a polystyrene surface are combined with a low effective density in a new class of microspheres. Polybead® Hollow Microspheres are spherical styrene / acrylic beads supplied in suspension. A relatively dense shell of a polystyrene based copolymer is formed around a void in the particle. Sphere voids are water-filled in the as-supplied 5% solids aqueous suspension, and the water-filled particle will have an effective density near 1.0 g/cm³. Water is lost from the void upon drying as the particles are slightly porous. This results in a hollow particle with a shell approximately 0.10µm thick. Surfactants on the surface of the spheres help stabilize the particles.

The biomedical advantages of a polystyrene surface are combined with a low effective density in a new class of microspheres. Polybead® Hollow Microspheres are spherical styrene / acrylic beads supplied in suspension. A relatively dense shell of a polystyrene based copolymer is formed around a void in the particle. Sphere voids are water-filled in the as-supplied 5% solids aqueous suspension, and the water-filled particle will have an effective density near 1.0 g/cm³. Water is lost from the void upon drying as the particles are slightly porous. This results in a hollow particle with a shell approximately 0.10µm thick. Surfactants on the surface of the spheres help stabilize the particles.

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

500-850μm

Manufactured from specially selected borosilicate with a density of ~2.5 g/cm³.

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

150-210μm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

10-30µm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

50-100µm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

105-150µm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

30-50µm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

210-250µm

Polysciences has a full size range of glass beads that are manufactured from specially selected soda lime glass with a density of ~2.48.

250-300µm