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Why did the plastic part fail?

Detective story: why did the plastic part fail?

Raman microscope DXR3xi

If you use plastic parts during production, you may encounter a problem that some of them will fail. This can have a number of reasons, from unsatisfactory physical properties to an unexpected chemical reaction in the material that has occured unnoticed. In many cases, such a failure may not have serious consequences, but if the component is in the wrong place, it can literally be life-threatening. And the search for the cause thus becomes a real detective story.

  • Application description
  • FT-IR spectroscopy
  • Raman spectroscopy

In the case of our detective story, a plastic cover got into the main role. It supposed to remain opaque to prevent interference with sensitive components inside the device. However, this did not happen as the cover began to transmit unwanted radiation, although at the first glance everything seemed to be fine. Transmittance measurements then showed that, compared with a properly functioning enclosure, the faulty one transmits a significant amount of radiation. In order to determine the cause of this phenomenon, the sample was also analyzed by thermogravimetric analysis (TGA).

The principle of this measurement is that the sample is gradually heated, which releases individual compounds from it, and we then analyze them. The defective cover turned out to contain less inorganic fillers. However, this was not enough for the final verdict and it was necessary to proceed to the analysis by infrared spectroscopy: FT-IR with iS50 spectrometer. Using this method, it was found that a properly functioning cover, unlike the defective one, contains rutile, one of the forms of TiO2. This was also confirmed by Raman spectroscopy, which can also be performed using the iS50 spectrometer.

This detective story shows that not only does laboratory work sometimes resemble detective investigation, but also that if we encounter a problem, we need to look at it from more angles before we find a final solution. The iS50 spectrometer is therefore the ideal equipment for all similar "detective" laboratory, as it allows not only the measurement of infrared spectra in the classical way, but also enables using the ATR method, can measure Raman spectra, and can be connected to other instruments such as TGA or GC.

Nicolet Summit is a small, easy-to-operate, reliable and low-maintenance infrared spectrometer that makes infrared spectroscopy accessible to all users, not just spectroscopic professionals. The high reliability of the individual components of the device makes it almost indestructible and significantly reduces operating costs.
Nicolet iS5 = Portability + precise scientific measurement parameters The Nicolet iS5 FT-IR spectrometer is a small, easy-to-operate, reliable and low-maintenance infrared spectrometer that makes FT-IR spectroscopy accessible to all users, not just spectroscopic professionals. The high reliability of the individual components of the device makes it almost indestructible and significantly reduces the cost of its operation.
In the last decade, thousands and thousands of users have set the Nicolet iS10 FTIR spectrometer as the new, high standard for laboratory infrared spectrometers. Now its successor, the Nicolet iS20 FTIR spectrometer, is raising the innovative bar to the next level!
The Nicolet iS50is the first scientific one-touch FT-IR spectrometer. Based on extensive experience with previous successful Magna, Nexus and Nicolet X700 scientific systems, a new FT-IR spectrometer has been developed which, thanks to a wide range of measuring accessories and interconnected analytical software, delivers a universal material analysis system with unrivaled ease of use.
Inserting the SurveyIR accessory into the sample compartment of the spectrometer allows the acquisition of high quality data in combination with the image documentation of the samples.
The Nicolet DXR3 Dispersi Raman Microscope is an instrument designed for applications requiring high spatial resolution, ease of sample preparation, and the use of the strongpoints of Raman microscopy.
The user-proven DXR Raman microscope is now available in the new version of the DXR3xi with a high-performance EMCCD detector and a microscopic table with the possibility of nanoslift for super fast Chemical Imaging of your samples.
The portable Raman spectrometer iRaman™ Plus is unique with its high resolution, choice of three different excitation lasers (532 nm and 785 nm) and especially its easy portability! The possibility of connecting a microscope is also unique (more here).
Thanks to the integrated touch screen, the i-Raman Pro can also be used without an external PC or laptop.

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