MFR is the mass of a polymer that flows through a capillary at a predetermined temperature and pressure over a predetermined amount of time. The molecular weight is related to the value of the calculated melt flow index testing equipment. The molecular weight decreases as the MFR rises. Additionally, MFR is inversely correlated with viscosity: the capacity of melted material to flow under pressure. Lastly, we can measure molecular weight distribution by comparing the values of a single material at various gravimetric weights. A small amount of the material, typically a pellet or powder, is melted into a viscous fluid in a heated barrel during the MFR test. Over a predetermined time, a deadweight piston extrudes a portion of the sample through a capillary.
Why is it important?
Melt flow testing measures how a polymer flows when it is melted. The melt flow test itself is easy to understand. A piston loaded with dead weights forces a small amount of a thermoplastic sample, typically in the form of granules or flakes, out of a capillary die after it is heated to a predetermined temperature in a barrel and melted into a viscous fluid. After a sufficient amount of sample extrudate has left the die, it is taken out and weighed, or the machine measures the volume of the sample.
- Melt flow index testing equipment are used in many laboratories and quality control facilities to measure it.
- A production batch can be a trouble-shooter with the MFI Tester, as can changes in polymer formulations.
- Melt Flow Index can also classify polymers and select those best suited to particular applications. Melt Flow Index is a crucial property that should be measured whenever possible for various reasons.
- Molecular weight distribution comparisons can also be made with MFI.
An extruder, die, and the motor is the components that make up the Melt Flow Index Tester. The recorded data are then used to calculate the Melt Flow Rate. Polymer processing conditions and quality control can benefit from using the Melt Flow Index. Additionally, it is utilized to evaluate the suitability of various polymers for a given application. As a result, the polymer’s molecular weight, viscosity, and weight distribution can all be linked to MFI.
Why use Lab testing instruments?
Laboratory analysis results frequently serve as the basis for crucial decisions regarding the publication of research findings and the quality of manufactured goods. The purpose of laboratory instruments is to provide highly reliable analysis results. You must have wondered which factors contribute to your confidence in an analytical instrument’s results. First, let’s go over a few of the most common things that are thought to contribute to the high level of reliability of laboratory data.
High-quality lab testing instruments produce precise results. Employing the best laboratory equipment from Emphor DLAS, one of the dependable laboratory partners can help any laboratory achieve its goal of becoming known for the quality of its results. Even a minor error brought on by defective equipment can have disastrous repercussions, which most laboratories would rather avoid.
Reputation of manufacturer
It is believed that a manufacturer’s national or international reputation boosts confidence in the accuracy of the results. However, there is no direct correlation between the instrument’s data reliability and the supplier’s reputation.
The reputation of the laboratory
All commercial test houses and laboratories strive to improve their services and increase client confidence through regular facility upgrades and certifications, registrations, and accreditations from both industry boards and national and international regulatory bodies. These labs come up with quality policies and follow good laboratory practices that meet the standards set by regulatory bodies.
However, even though these laboratories hold numerous accreditations and certifications, they are still required to verify the accuracy of their results through inter-laboratory testing in other accredited laboratories. Calibration records for all laboratory instruments covered by the calibration schedule are more important than ever. Manufacturers’ technical support should be contacted if any calibration parameter falls outside the specifications.
Cost of tools
The more advanced features and automation the instrument can provide, the more expensive it becomes. However, the cost of the equipment does not increase the confidence in the data’s accuracy. Scientific research relies heavily on high-quality lab testing instruments. Labs will be spared many problems arising from poor testing or defective equipment if the most accurate results are produced.