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Molecular Weight Distribution
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Polymers and plastic materials are organic, synthetic or processed polymers that are supplied as raw materials. They typically consist of thermoplastic or thermosetting resins in the form of pellets, powders or liquid resins. These materials can then be molded into a variety of shapes for a wide range of uses.
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Supplier: Dow Automotive SystemsDescription: Dow LDPE 959S polyethylene resin is a medium molecular weight distribution homopolymer. This resin has good processability over a wide range of molding conditions.
- Material Type / Grade: Thermoplastic
- Chemical / Polymer System Type: Polyethylene
- Filler Material: Unfilled
- Compound Type: Extrusion Grade Resin, Molding Resin
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Supplier: Dow PolyurethanesDescription: PAPI™ 27 Polymeric MDI is a polymethylene polyphenylisocyanate that contains MDI. This product has a narrow molecular weight distribution and high reactivity. It is suitable for a full range of low to high density semi-rigid foams, rigid foams for insulation and processing of structural RIM
- Cure Type / Technology: Two Component System, Thermosetting / Crosslinking
- Features: Water Based / Latex Dispersion
- Industry: Automotive, Other
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Supplier: Shimadzu Scientific Instruments, Inc.Description: Gel permeation chromatography (GPC) is essential in polymer chemistry for measuring the distribution of molecular weights. Shimadzu has introduced the Prominence GPC system, designed specifically to provide superior data reliability and ease of use.
- Instrument Type: Fixtured or Permanent
- Analysis Method: Analytical Analysis
- Detection Method: Refractive Index Detector
- Injection Method: Auto-sampler Injection
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Supplier: U.S. Plastic CorporationDescription: These closed head containers are blow molded with improved performance characteristics of high molecular weight high density polyethylene. It can withstand the rigors of distribution and permits a wide range of filling temperatures. This all plastic drum is corrosion resistant and compatible
- Type: Drum / Barrel / Keg
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Supplier: Malvern Instruments, Inc.Description: weight. It also allows further characterization of the protein size distribution to determine the presence and proportion of aggregates. Static light scattering enables you to determine the absolute molecular weight and 2nd virial coefficient of your protein in the sample buffer - a value indicating how
- Measurement Type: Size
- Sample Type: Dispersion / Liquid (Emulsion, Suspension)
- Technology / Operating Principle: Diffraction / Scattering
- Display & Special Features: Computer Interface / Networkable, Laboratory / Batch, SPC Software / Capability
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Supplier: Grant Industries, Inc.Description: Granpowder PE-10 is a fine powder of polyethylene with a molecular weight over 2 million. The average particle size is 10 microns with a relatively narrow distribution. Granpowder PE-10 features outstanding heat resistance due to its higher melting point in comparison with conventional polyethylene
- Compound Type: Pellets
- Industry: Other
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Supplier: Dow Automotive SystemsDescription: Dow LDPE 959S polyethylene resin is a medium molecular weight distribution homopolymer. This resin has good processability over a wide range of molding conditions.
- Material Type / Grade: Thermoplastic
- Chemical / Polymer System Type: Polyethylene
- Filler Material: Unfilled
- Compound Type: Extrusion Grade Resin, Molding Resin
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Supplier: Dow Automotive SystemsDescription: Dow LDPE 959S polyethylene resin is a medium molecular weight distribution homopolymer. This resin has good processability over a wide range of molding conditions.
- Material Type / Grade: Thermoplastic
- Chemical / Polymer System Type: Polyethylene
- Filler Material: Unfilled
- Compound Type: Extrusion Grade Resin, Molding Resin
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Supplier: Dow Automotive SystemsDescription: Dow LDPE 959S polyethylene resin is a medium molecular weight distribution homopolymer. This resin has good processability over a wide range of molding conditions.
- Material Type / Grade: Thermoplastic
- Chemical / Polymer System Type: Polyethylene
- Filler Material: Unfilled
- Compound Type: Extrusion Grade Resin, Molding Resin
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Supplier: Dow PolyurethanesDescription: PAPI™ 27 Polymeric MDI is a polymethylene polyphenylisocyanate that contains MDI. This product has a narrow molecular weight distribution and high reactivity. It is suitable for a full range of low to high density semi-rigid foams, rigid foams for insulation and processing of structural RIM
- Cure Type / Technology: Two Component System, Thermosetting / Crosslinking
- Features: Water Based / Latex Dispersion
- Industry: Automotive, Other
Featured Products for Molecular Weight Distribution Top
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., have different atomic weights. For carbon, the atomic weight is 12, and for hydrogen it is 1. Thus, the molecular weight of the ethylene unit, is the sum of the weight of its six atoms (2 carbon + 4 hydrogen) or 28. Every polyolefin resin consists of a mixture of large and small chains, i.e., chains of high and low molecular weights. The molecular weight of the polymer chain generally is in the thousands. The average of these is called, quite appropriately, the average molecular weight... (read more) -
Ultra high molecular weight film tapes have a low coefficient of friction and are wear resistant. They may be used to replace PTFE, and they provide a smooth surface. They allow material to glide, without friction, and may line shutes in certain production processes. Other applications include the base of skis and snowboards. Thickness: 5-20 mil. Width: custom slit. Length: 18-36 yards (read more)Browse Thread Tapes Datasheets for Can-Do National Tape -
with blow molding or extrusion processes. Many factors affect polymers' flow properties. Molecular weight distribution, the presence of co-monomers, the degree of chain branching and crystallinity influence a polymer's MFI as well as heat transfer in polymer processing. Ratios between two melt flow rate values for one material at different gravimetric weights are often used as a measure for the broadness of the molecular weight distribution. MFR indicates "melt flow ratio", the ratio between two... (read more)Browse Material Testing Services Datasheets for Associated Polymer Labs, Inc. -
What makes UHMW-PE such a distinctive and useful material? It's the combination of excellent properties - outstanding abrasion resistance, superior impact resistance, non-sticking and self-lubricating properties and excellent mechanical properties, even in cryogenic conditions. UHMW-PE is an extremely high viscosity polymer that is produced in the form of a powder and has an average particle size diameter typically ranging from 100-200 microns. As a result of its viscosity, it generally cannot... (read more) -
molecular weight. Molecular weight distribution. Branching and structure. Molecular size. Copolymer composition. Which Viscotek system is right for you?... (read more)Browse Particle Analyzers Datasheets for Malvern Instruments, Inc. -
at the high temperatures (160oC) necessary for analyzing polyethylene and polypropylene. It measures absolute molecular weight, molecular weight distribution, and polymer chain branching in just a single experiment. These are critical parameters for polyolefins that influence in-use properties such as strength and permeability. Although GPC is a well-established and valued technique for polymer analysis its use with polyolefins is hampered by their sparing solubility in so many solvents. High... (read more)Browse Particle Analyzers Datasheets for Malvern Instruments, Inc. -
data to avoid costly recalls and scrap. Examples. Determination of the degree of long chain branching (melt strength). Temperature dependence of viscosity. Frequency temperature relationships. Blown and cast film, maintain gauge uniformity. Reduce inconsistent lot to lot variations, high rejections, poor yields. Measure melt strength. Thermal aging on melt properties, changes in the molecular structure. Recycling and reclaim of plastics, measure the quality. Rheological behavior of molten... (read more)Browse Material Testing Services Datasheets for Associated Polymer Labs, Inc. -
InCon's Laboratory Short Path Distillation System is a small Molecular Distillation System for R &D facilities. It is invaluable in developing formulations, generating products and proving process separations involving Molecular Distillation Technology. Since small quantities of the materials are required, this versatile tool provides the means for isolating small quantities of your formulation for evaluation. The Single Stage Distillation Plant runs at 0.1 to 2.0 liters per hour... (read more) -
silicone, epoxy, citrus oil, mint oil, spice extracts. Our client's cannot cost justify investment in an in-house Molecular or Short Path Distillation Plant or the modest volumes dictate toll processing or contract manufacturing. InCon has private label toll processing for Cranberry extract, Blueberry extract, Omega 3 fish oil or fatty acids, CLA and creatine. We generate high concentrations or special blends thru a hybrid process called short path high vacuum distillation. Often we are asked... (read more)Browse Contract Manufacturing Services Datasheets for InCon Processing LLC -
and retention of intrinsic viscosity (IV) and molecular weight distribution (MWD). For non-dried extrusion, Davis-Standard supplies co-rotating twin screw extruders or patented MRS® Extrusion extruders. Full system control is available via Davis-Standard's HMI EPIC process controller with automated features such as gauge control and real-time edge width measurement. A single operator console enables oversight of all operations including material handling, operating conditions, continuous... (read more)Browse Extrusion Machines Datasheets for Davis-Standard, LLC
Conduct Research Top
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Raw Material Selection for Maximum Product Quality (.pdf)
provides information about the molecular weight distribution (MWD) and the weight average molecular weight (Mw). As the crossover frequency decreases the MWD is increasing. The viscosity at lower frequencies, 0.1 rads/sec, is related to the Mw of the polymer. The temperature ramp provides...
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Types of Plastics
length, so each batch will have an average molecular-weight distribution. There can be either a broad or a narrow spread between molecular weights of the largest and smallest molecules, and the polymer still could have the same average. A narrow distribution provides more uniform properties; a broad...
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The sound of viscosity
measurement of a liquid's consistency in both molecular weight and molecular-weight distribution. Viscosity can give other insights into materials and properties that can be valuable in manufacturing processes. Trouble is, almost all methods for measuring viscosity were developed originally for laboratory...
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Medical Device Link . Metallocene Polyethylene Films as Alternatives to Flexible PVC for Medical Device Fabrication
, and clarity. Recent developments in metallocene single-site catalyst technology make possible precise control of molecular architecture and enable the production of polyolefin resins with very low densities and narrow molecular-weight distributions. Metallocene-catalyzed polyethylene copolymer resins...
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Dynamic Testing Uncovers Rheology of Rubber
Molecular weight, molecular weight distribution, and long chain branching of uncured rubber compounds are important parameters to understand to predict the curing process and fi nal material properties of the cured rubber. The ElectroForce(R) 3200 test instrument has been used to measure...
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Medical Device Link .
and molecular weight distribution must also be determined. Antibodies can aggregate as a function of temperature, acidity, ionic strength, and concentration. Even small amounts of aggregates (dimer, trimer, etc.) can be significant because they can cause conformational shifts in the molecular...
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Medical Device Link . Clear, Radiation-Tolerant, Autoclavable Polypropylene
and narrow molecular-weight distribution, are formulated with hindered-amine light stabilizers (HALS), and contain none of the discoloring phenolic antioxidants. Ethylene- containing random copolymers are useful substrates for building radiation-tolerant formulations, as are homopolymers with low...
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Living anionic polymerization of methyl methacrylate
polymerization is an established method for synthe-. sizing polymers with a very narrow molecular weight distribution and. specific structures such as starpolymers and block copolymers. Living. anionic polymerization is usually conducted by using an initiator such. as an alkyllithium compound. However...
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Laser Diffraction
are shown below with a brief explanation as to the basis of the technique and its applicability. Dynamic Light Scattering. Static Light Scattering - Absolute Molecular Weight. Laser Diffraction. Zeta Potential. Automated Vision Systems. Rotational Viscometry and Rheology. Capillary rheology. Dynamic Light...
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The future will be measured in nanometers
and image molecular landscapes. Forty-eight iron molecules were set into a circular ring (top) to corral some surface state electrons and force them into quantum states of the circular structure. Ripples inside the ring are the density distribution of a particular set of quantum states of the corral...
Engineering Web Search: Molecular Weight Distribution Top
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Molecular mass - Wikipedia, the free encyclopedia The molecular mass (m) of a substance is the mass of one molecule of that substance, in unified atomic mass unit(s) u[1 (equal to 1/12 the mass of |
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Polymer - Wikipedia, the free encyclopedia Common examples are the number average molecular weight and weight average molecular weight.[15[16 The ratio of these two values is the |
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Extrusion of Broad Molecular Weight Distribution Polyethylenes... (single-screw) characteristics of four high molecular weight, broad molecular weight distribution (MWD) polyethylene resins are discussed with an See Society of Plastics Engineers Information |
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ASTM D5296 - 05 Standard Test Method for Molecular Weight... General Utility?The molecular weight (MW) and molecular weight distribution (MWD) are fundamental characteristics of a polymer sample. See ASTM International Information |
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Calculation of the molecular weight distribution of the... Calculation of the molecular weight distribution of the polymer produced in a cascade of reactors with allowance for chain transfer to the polymer |
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Particle Size Analysis, Zeta Potential Measurement, Rheology,... Molecular size Molecular structure Molecular weight Molecular size Molecular structure Molecular weight See Malvern Instruments, Inc. Profile & Catalog |
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ARS | Publication request: MOLECULAR WEIGHT DISTRIBUTION AND... Title: MOLECULAR WEIGHT DISTRIBUTION AND FUNCTIONAL PROPERTIES OF ENZYMATICALLY MODIFIED COMMERCIAL AND EXPERIMENTAL GELATINS |
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ARS | Publication request: Content and molecular weight... Title: Content and molecular weight distribution of oat beta-glucan in Oatrim, Nutrim, and C-Trim products |
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Number-Average Molecular Weight ? Molecular Weight ? Molecular Weight Distribution |
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SHAC Catalyst ADT ADT allows for tailored product specific applications based on xylene solubles (XS), molecular weight distribution (MWD) and oligomers requirements. See Dow Chemical Company (The) Information |
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