{"id":"wpc-tech100-article-074-en","slug":"ftir-screening-of-wpc-composition-changes","locale":"en","url":"https://woodplasticcomposite.net/guides/ftir-screening-of-wpc-composition-changes/","title":"FTIR screening of WPC composition changes","answer":"Infrared spectroscopy can help investigate chemical features in a composite or feedstock. It is most useful when the sampling method and comparison question are explicit.","author":"NFC & WPC Knowledge Reference","faqIds":["wpc-tech100-faq-074-en"],"tagIds":[],"noindex":false,"related":["wpc-tech100-article-075-en"],"version":1,"modified":"2026-10-15","reviewer":"","sections":[{"id":"technical-context","text":"A surface spectrum may not represent the bulk material. Overlapping contributions from wood, polymer and additives can complicate interpretation. Identifying a peak is not automatically a quantitative measurement of formulation content.","heading":"Technical context","references":[],"url":"https://woodplasticcomposite.net/guides/ftir-screening-of-wpc-composition-changes/#technical-context"},{"id":"verification-plan","text":"Record sample preparation, measurement mode and reference spectra. Compare equivalent locations and conditions. Use additional analysis when the proposed conclusion depends on distinguishing constituents that cannot be separated confidently from one spectrum.","heading":"What to measure and document","references":[],"url":"https://woodplasticcomposite.net/guides/ftir-screening-of-wpc-composition-changes/#verification-plan"},{"id":"practical-decision","text":"Keep claims within the method's capability. FTIR can support an investigation of a material change, but it cannot independently certify the finished profile's strength, fire rating or service life. A technical conclusion should combine suitable evidence sources.","heading":"Implications for development and specification","references":[],"url":"https://woodplasticcomposite.net/guides/ftir-screening-of-wpc-composition-changes/#practical-decision"},{"id":"reading-scope","text":"Experimental thermal analysis of defined composite compositions. Use the linked work as related reading. The practical checks above are editorial recommendations, not reported test results or a substitute for product qualification.","heading":"Related reading and evidence limits","references":[1],"url":"https://woodplasticcomposite.net/guides/ftir-screening-of-wpc-composition-changes/#reading-scope"}],"seoTitle":"FTIR screening of WPC composition changes | WPC Reference","topicIds":[],"published":"2026-10-15","tableText":"Review step | Evidence to retain\nMaterial and geometry | Exact specimen or product identity\nVerification | Method, conditions and individual observations\nDecision | Approved scope and documented limitations","takeaways":"A surface spectrum may not represent the bulk material.\nRecord sample preparation, measurement mode and reference spectra.\nKeep claims within the method's capability.","aiAssisted":true,"categoryId":"wpc-tech100-category-3","reviewedAt":"","change_note":"New focused technical draft; not a product certification or production recipe.","description":"Infrared spectroscopy can help investigate chemical features in a composite or feedstock.","heroImageId":"","referenceIds":["wpc-tech100-ref-thermal"],"review_status":"AI-assisted English editorial draft. Human technical review has not been recorded.","table_caption":"Evidence checklist for ftir screening of wpc composition changes","seoDescription":"Infrared spectroscopy can help investigate chemical features in a composite or feedstock.","translationGroup":"wpc-tech100-074-2026","references":[{"url":"https://doi.org/10.3390/ma12060881","type":"web","title":"Thermal properties of WPC with different compositions","noindex":false,"accessed":"2026-10-14","seoTitle":"Thermal properties of WPC with different compositions","publisher":"Materials","description":"Related reading; scope and limitations are identified in each article.","seoDescription":"Related reading; scope and limitations are identified in each article."}],"faqs":[{"question":"What evidence is needed for fTIR screening of WPC composition changes?","answer":"Record sample preparation, measurement mode and reference spectra. Compare equivalent locations and conditions. Use additional analysis when the proposed conclusion depends on distinguishing constituents that cannot be separated confidently from one spectrum."}]}