Analytical Instrumentation
Full characterization of Polymers by Preparative Fractionation
Fully automated column-based preparative fractionation equipment for Polymers
PREP C20 is a fully-automated column-based fractionation equipment capable of fractionating up to 20 grams of polymer, according to its chemical composition.
By adding a column as a support for the solution to crystallize in, the separation for each of the fractions is more appropriate, especially for recently developed products such as the multiple-reactor catalyst resins, in which a support for the solution to adhere to is critical.
PREP C20 works as a pilot plant in a completely automated manner. The main steps of fractionation are performed automatically: dissolution, loading of the column, crystallization, elution, and collection of the fractions, avoiding the need of handling hot and large amounts of solvent.
PREP mc2 is a preparative instrument intended for fractionating polymers by either chemical composition (TREF or CRYSTAF) or by molar mass. Samples are put into the vessels and the fractionation is performed automatically according to the selected method conditions in less than 24 hours.
Molar Mass fractionation is based on the solvent interaction with the polymer chains through a solvent/ non-solvent combination. Polydispersity of the resulting fractions can be very narrow.
Composition fractionation is based on the differences in crystallizability of the copolymer resins and can be performed by dissolution (TREF) or by precipitation (CRYSTAF) approaches. A single solvent is used to separate fractions according to their composition by dissolution or crystallization at different temperatures.
Up to 16 fractions can be obtained from a single sample fractionation as per the sample collector capacity. Two different samples can be fractionated at the same time, in which case up to 8 fractions per sample can be collected per run.
This instrument facilitates the cross-fractionation studies, which have been shown to be a needed tool to fully characterise resins. Fractions collected can be analysed by other techniques such as NMR, FTIR and DSC.
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Fast GPC/SEC for Molar Mass Distribution in Production and Plant Environments
The software allows the analysts to create their own methods adjusted to their samples. Up to 9 fractions can be obtained automatically, and it is possible to check the fractionation process thanks to an interactive software. Once the fractionation is finished, the equipment is clean and ready to start a new fractionation right away. The obtained fractions can be further analyzed by other techniques and/or can be used for micromechanical testing as well.
Fractionation takes place in a Temperature Rising Elution Fractionation (TREF) mode, although other techniques of fractionation, such as Thermal Gradient Interaction Chromatography (TGIC), Molar Mass, and Solvent Gradient Interaction Chromatography (SGIC) might be possible as well.
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9
Simple and fast GPC Polyolefin analysis for QC
One sample can be analyzed every 30 minutes including dissolution.
GPC-QC is a compact, high temperature GPC/SEC instrument for quality control and process control in polyolefin manufacturing lines that provides robust and precise Molar Mass Distribution. It delivers the complete Molar Mass Distribution for one sample at-a- time through a simplified workflow, while completely automating the entire process. Both sample preparation and analysis are free of manual solvent handling and are completed in 30 minutes, including the dissolution time. The detection used in the instrument can be either Polymer Char’s IR4 or IR5 MCT integrated detectors. These are highly reliable detectors, contributing to the overall reliability while providing chemical composition information, which is key for controlling production of heterogeneous resins. This is particularly relevant in the case of copolymers, which account for a large proportion of polyolefins produced, such as LLDPE, some HDPE, and the important group of EP copolymers as well.
The information generated by the IR detector can be translated to either co-monomer weight fraction or to density units for a given product range. Moreover, for a truly complete analysis, the instrument can measure intrinsic viscosity by means of a built-in dual capillary viscometer that can be incorporated optionally.
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For More Info, email:
47425pr@reply-direct.com OCTOBER / NOVEMBER •
WWW.PETRO-ONLINE.COM
GPC-QC: Fast Gel Permeation Chromatography for Process Control in Polyolefins Manufacturing Plants.
· Additional Short Chain Branching and Intrinsic Viscosity Information.
· Especially useful for multi-reactor and multi-catalysts resins. · Capable of analyzing UHMWPE resins. · Simple and reliable design for Quality Control environments. · Delivers the complete Molar Mass Distribution curve for one sample through a simplified workflow.
same MI
log MW
Three different resins with the same Melt Index but completely different MWD, thus, different performance.
polymerchar.com
dw/dlogMW
MMD
2018. Polymer Char is a registered trademark of Polymer Characterization, S.A.
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