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TESTING | MATERIALS


Selecting the most appropriate testing techniques depend on various factors, including the purpose of the test, the point in the manufacturing chain it will take place, ease-of-use, sensitivity and level of automation, says PerkinElmer


What am I testing? Identification


Mechanical and thermal attributes


Impurity testing


Most used by • All


When am I testing? • On arrival


• During recycling sorting process


• Raw material supplier


• Final product and packaging • End of raw materials production


Technologies


• FT-IR, IR microscopy • DSC


• Compounder • Throughout research and development • DSC, DMA, TMA, TGA • Converter


• FT-IR


Residual monomers • Resin producer • Pre-shipping and contaminants


• Compounder • On arrival • Recycler


Crystal orientation Toxins Leachates and volatile emissions • Production checkpoints • End of the recycling process


• Compounder • End of manufacture • Pre-shipping


• Converter • Recycler


• Converter • Final product and packaging • Final product and packaging • FT-IR


• GC, GC/MS, HPLC, LC/MS • ICP-OES, ICP-MS


• FT-IR, IR microscopy


• GC, Headspace, GC/MS, HPLC, LC-MS/MS • ICP-OES, ICP-MS • Hyphenation TG-IR, TG-GC/MS, TG-IR-GC/MS


Failure anaysis and • Compounder • Throughout research and development • FT-IR, IR microscopy reverse engineering a material


• GC, LC


• DSC, DMA, TMA, TGA • ICP-OES, ICP-MS • Hyphenation TG-IR, TG-GC/MS, TG-IR-GC/MS


Source: Perkin Elmer


leads to new opportunities to apply portable application testing (PAT). We are increasingly working with our clients to develop bespoke PAT solutions to enable measurement of chemical components or physical properties directly in process streams. This allows real-time insight into the process and products, allows detection of problems such as low or high levels of substances and early awareness of potential production issues,” she says. “Having the right PAT in place for critical processes that delivers accurate data can drive confidence in the ability of the plant to deliver first-class product and performance goals where margin pressure and cost control are constant issues.”


Assuring quality According to PerkinElmer, the need for testing and assessing the quality of polymers is growing alongside manufacturers’ moves to deploy comprehensive polymer quality assurance programmes. “There are many factors to consider when deciding on the best method for polymer testing applications,” says Gerlinde Wita, Global Market Manager, Materials, Energy & Petrochem. “These include the purpose of testing and the point in production when it will take place, as well


www.compoundingworld.com


as the scalability, ease of use, sensitivity and automation potential of the instrument.” Wita says, for example, that while testing for


identification purposes might require the use of infrared spectroscopy (FT-IR) solutions, testing for toxins may require the use of gas chromatography- mass spectrometry (GC/MS). “In addition to testing considerations, the


production of polymer compounds and masterbatches also requires labs to gain a competitive edge at all stages from research and development (R&D) to quality and safety. The key to this is often hyphenated equipment - the coupling of two or more instruments to increase the power of analyses and throughput,” she says. “To ensure maximum safety both in labs and for


those further down the supply chain, there is a separate set of features regarding the ease-of-use of equipment that must also be considered. These include the robustness, size, portability, automation capability and a common shared software platform between instruments to ensure a smooth operation within the lab. Combined, this guarantees the best possible sensitivity and resolution capabilities to best assure the quality of the final product,” says Wita. According to PerkinElmer, one of most pressing drivers in testing equipment innovation is the need


January 2022 | COMPOUNDING WORLD 27


• ICP-OES, ICP-MS • IR microscopy


• GC, GC/MS • ICP-OES, IC-MS


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