Agilent Manuals

This document describes the application of GPC triple detection analysis of polybutadiene using the Agilent 390-MDS Multi Detector Suite. Polybutadiene is an elastomer with high elasticity and recovery. It is commonly used to coat electronic assemblies and for tire production. The document provides detailed information on experimental conditions and instrument setup.

This application note introduces the GPC analysis method for poly(n-isopropylacrylamide) (PNIPAM) smart materials using the Agilent 390-MDS multi-detector suite and universal calibration method.

This application note describes the use of the Agilent 390-MDS multi-detector suite for GPC triple detection of polyvinyl butyral (PVB). PVB is an important material with a wide range of applications requiring strong binding, optical clarity, excellent surface adhesion, toughness and flexibility. The most well-known application of PVB is in laminated safety glass, for example, in the windscreens of vehicles. In such products, PVB is used as an interface layer between two sheets of toughened glass. The interface layer absorbs the energy of impacts, binding broken shards of glass together and distributing the force of the impact over a wide area. The use of laminated glass has greatly reduced injuries resulting from automobile accidents. As it is the viscoelastic properties of PVB that contribute to its performance in glass laminates, the molecular weight distribution of the material must be closely monitored to ensure optimum performance. Gel permeation chromatography (GPC) with triple detection, employing a light scattering detector and viscometer, may be used to determine accurate molecular weights for polymers such as PVB. Three PVB materials were analyzed using these techniques, one of which did not perform as expected in application testing.

Describes a method for analyzing polystyrene star molecules by GPC Viscometry

This document describes the features and characteristics of the HDSP series displays, including excellent appearance, Slim font design, evenly illuminated segments with mitered corners, gray face for optimum on/off contrast, choice of colors, low current available, choice of character size, ± 50° viewing angle, and characterized for luminous intensity.

This data sheet provides specifications of the 18:88 and 88:88 0.56 inch four digit seven segment displays, including appearance, color, size, etc.

10 mm seven segment displays have industry standard size, industry standard pinout, a variety of colors, excellent appearance, design flexibility and other features

This article introduces the GPC viscosity method of linear and branched polyethylene glycol

This article describes a method for separating trichlorobenzene from fish using Agilent EcoSpheres. EcoSpheres are a novel type of gel beads that have a unique structure and chemical composition that allows them to capture and separate organic contaminants. EcoSpheres have excellent performance and can effectively separate trichlorobenzene. The method is simple and easy to use and can be widely applied to the analysis of trichlorobenzene in environmental samples.

This application note describes the use of the Agilent PL-GPC 50 high-performance liquid chromatography/molecular weight characterization system to analyze the molecular weight distribution of polyisobornyl methacrylate in tetrahydrofuran. Polyisobornyl methacrylate is a high-melting, heat-resistant thermoplastic polymer used in the manufacture of paints, adhesives, sealants, lubricants and oil-based coatings.

This article introduces the GPC analysis method and results of polybutadienes. Polybutadienes are a type of synthetic rubber commonly used in the production of tires and car parts due to their high temperature and wear resistance. Triple detection GPC method is employed to assess the molecular weight distribution and molecular structure of polymers without relying on column calibrations. This is important for analyzing complex materials.

This note describes the use of alternative solvents for sample clean-up with Agilent EnviroPrep columns to replace the toxic dichloromethane. Several solvent mixtures were investigated for use with EnviroPrep columns, and the effect of the eluent on the elution of the standard test mixture described in the EPA methodology is described.

This application note describes a loading study performed on EnviroPrep columns to investigate the effect of sample concentration on-column on peak shape.

This application note discusses the characteristics of block copolymers synthesized via transition metal mediated living radical polymerization. These reactions allow for controlled synthesis of polymers with predetermined molecular weight, polydispersity, and well-defined architecture using cheap and simple procedures. The ability to convert hydroxyl functional groups to active initiator groups enables the synthesis of architecturally diverse materials such as stars, blocks, and grafts. Block copolymers consist of two or more chains with different repeat units, known as blocks. For example, a block of polystyrene connected to a block of polymethy...

Polyacrylic acid is a biodegradable water soluble polymer with numerous industrial applications, including as a super adsorbent (eg in disposable nappies), in water treatment as a metal ion scavenger and in the treatment of metal surfaces prior to coating. The molecular weight distribution (MWD) of this material is an important parameter, as it strongly affects its end use properties. Aqueous SEC is an ideal analytical tool for the measurement of the MWD of polyacrylic acid. Since polyacrylic acid is a polyelectrolyte, care must be taken in selecting the appropriate SEC conditions. In the method described below, a buffered mobile phase with a high electrolyte content was used to minimize non-size exclusion effects. Agilent PL aquagel-OH MIXED 8 µm columns were selected to provide good resolution over a wide molecular weight range. Column calibration was achieved using Agilent EasiVial PEG/PEO standards see Figure 1. EasiVials provide a rapid and convenient means of constructing an aqueous SEC column calibration curve over a wide molecular weight range (typically 100 to 1,200,000 g/mol). Each vial contains a mixture of four individual, highly characterized, narrow dispersity standards. The amount of each individual standard is carefully controlled during manufacture, allowing their use in SEC-viscometry, which requires accurate concentrations. Refractive index chromatograms obtained from each E