Polymer Char laboratory specializes in the microstructural characterization of polyolefins. Our extensive knowledge and expertise are helping companies worldwide deepen their understanding of their polyolefin products.
For Gel Permeation Chromatography (GPC) or Size Exclusion Chromatography (SEC) analysis we use GPC-IR and GPC-QC instruments. Both GPC systems are optimized for the analysis of polyolefins, and their Infrared detectors – IR5 or IR6 – are used for obtaining the Molecular Weight Distribution and the Chemical Composition Distribution (or Short Chain Branching (SCB)) of the sample.
Viscometer and Multi-angle Light Scattering (MALS) detectors can be added to provide Intrinsic Viscosity, Long-chain Branching (LCB), and Absolute Molar Mass results.
GPC/SEC analyses are particularly useful for bimodal HDPE, LDPE, EP copolymers, and Ultra High Molecular Weight polymers, especially when combined with SCB and LCB information because of the extra dimension that these results provide.Our GPC/SEC method complies with the ISO 16014-4 and ASTM D6474 methods for High-Temperature GPC/SEC measurement.
The following are some results of samples analyzed by GPC-IR and GPC-QC:
This graph shows the outstanding reproducibility of the IR5 Detector for 10 injections of the same sample.
Flow rate: 1 mL/min
Concentration: 1 mg/mL (8mg in 8mL)
Dissolution time: 120 min
Temperature of columns: 160ºC
Chromatogram showing simultaneous signals of the Infrared Detector, Viscometer, and Light Scattering.
Two polypropylenes with similar Molecular Weight Distributions but different Short Chain Branching content.
1 x Rapid PL column (250x10mm 20um)
Flow rate: 1 mL/min
Concentration: 0.5 mg/mL
Dissolution time: 30 min
Shaking: 400 rpm
The chromatogram shows an outstanding baseline stability and a significant increase in sensitivity when using an Infrared Detector.
These detectors are used in our GPC analyses:
IR5 is capable of measuring the concentration and the chemical composition of polyolefins with superb sensitivity. This is especially useful for analyzing HDPE pipe resins, where a highly sensitive detector is required to accurately measure the low number of branches that they contain.
IR6 is capable of measuring the carbonyl group in the band of 1740 cm-1. This detector is recommended for users that want to analyze polyolefins type EVA, EBA, and others which have carbonyl group present in the aforementioned IR band.
By connecting a capillary Viscometer to a high-temperature GPC when analyzing polyolefins, the Intrinsic Viscosity (IV) can be determined. The IV is provided as a function of Molar Mass (MM), and then the Universal Calibration (UC) is applied for samples with different molecular structures.
Coupling a concentration detector to an online viscometer is a way to generate Mark-Houwink plots, which relate intrinsic viscosity with molar mass, a method for long chain branching characterization.
A Light Scattering detector connected to a GPC instrument makes it possible to determine the absolute Molar Mass without calibrating the GPC columns.
Coupling a concentration detector to a light scattering detector is a way to generate Conformations Plots (dependence of radius of gyration on molar mass), a direct method for detection and characterization of long chain branching.
To calculate the final price, please use the Standard fee as a base, and then add the corresponding fee for each additional result that you need.
|GPC/SEC (Price/Sample)||First Sample||Additional Samples|
|Chemical Composition (IR5)||626€||433€|
|Absolute Molar Mass by Light Scattering||559€||406€|
|Sample Filtration (carbon black)||219€||219€|
|Standard Data Re-processing||109€||109€|
|Minimum sample amount||>0.1 g|
No, this is an analytical GPC/SEC service, not a fractionation service.
We offer preparative fractionation services to fractionate samples by molecular weight or by chemical composition (TREF or CRYSTAF). For more information, please visit the links below:
For most of our characterization techniques, you will receive a report containing the analytical conditions used, the calibrations applied, and a summary table with the results, along with an Excel file containing the results. However, the type of data and report depend on the type of analytical service. For specifics about the contents of the analysis report, please contact firstname.lastname@example.org.
Please send an email to email@example.com and we will be pleased to help you.
You can order our analytical services by sending us an email to firstname.lastname@example.org or via our Contact Form, stating:
· Number of samples
· Type of sample
· Technique required
· Detectors / additional results needed
Please send your samples to the following address:
Polymer Characterization S.A.
Valencia Technology Park
Gustave Eiffel 8
Attn.: Analytical Services Department
We highly recommend to use a courier service instead of post mail, to make sure that your samples arrive soon and in good condition.
You will receive the results in less than a week. If you plan to send more than 10 samples, please check with our lab, as the response time may be longer in this case.
This time is approximate, and it depends on the service queue in the laboratory at the time of the order. Polymer Char will inform the customer if the turnaround time is expected to be longer.
Polymer Characterization, S.A. is committed to respecting and protecting the data that you provide to us. Polymer Characterization, S.A. acts in full compliance with the EU General Data Protection Regulation 2016/679 (GDPR). All your personal data will be processed and kept in strict accordance with the relevant legislation.
Strict privacy also applies to the analytical results. If a Privacy Agreement is needed in order to hire our analytical services, please inform us.
Thank you for your interest. If you would like to receive more information, or want to request a quotation, please complete this form.