{"id":10115,"date":"2019-03-19T16:13:41","date_gmt":"2019-03-19T16:13:41","guid":{"rendered":"https:\/\/www.thermofisher.com\/blog\/materials\/?p=10115"},"modified":"2026-09-18T15:15:35","modified_gmt":"2026-09-18T20:15:35","slug":"what-changed-a-comprehensive-analysis-of-polymeric-failure","status":"publish","type":"post","link":"https:\/\/www.thermofisher.com\/blog\/materials\/what-changed-a-comprehensive-analysis-of-polymeric-failure\/","title":{"rendered":"What changed? A comprehensive analysis of polymeric failure"},"content":{"rendered":"<div class=\"OutlineElement Ltr BCX0 SCXW7867839\">\n<p class=\"Paragraph SCXW7867839 BCX0\"><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">It\u2019s almost inevitable: a new supplier begins supplying the exact same part as the old supplier, and \u2013 you guessed it \u2013 the\u00a0<\/span><\/span><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">product\u00a0<\/span><\/span><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">begins to fail\u00a0<\/span><\/span><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">in the field<\/span><\/span><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">. Manufacturers employing plastic parts routinely face the challenge of analyzing failed parts to determine the root cause and corrective actions.<\/span><\/span><\/p>\n<div style=\"width: 6326px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kapost-files-prod.s3.amazonaws.com\/kapost\/590ba94f7f71ec0004002379\/studio\/content\/5c9110be17dc910062000080\/html_bodies\/1553011888-8235f964-d391-4497-9d2a-14e10b6a67ba\/Confused%20Man.jpg\" width=\"6316\" height=\"4172\" \/><p class=\"wp-caption-text\">Root Cause Analysis is used to identify and correct process issues<\/p><\/div>\n<p class=\"Paragraph SCXW7867839 BCX0\"><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">In this application note, our story follows a manufacturer of precision optical equipment that designed a plastic cover for a device with specifications for chemical composition, surface texture, color and optical transmission to ensure the correct diffuse transmission. A re-engineering project was subsequently initiated to reduce costs and make the product more competitive.\u00a0 Initially, all parts supplied met the specifications and the product provided satisfactory performance, but shortly thereafter, the product began to fail critical performance tests. A Root Cause Analysis using many techniques for polymer testing was undertaken to identify and contain the issue.<\/span><\/span><\/p>\n<\/div>\n<div class=\"OutlineElement Ltr BCX0 SCXW7867839\">\n<p class=\"Paragraph SCXW7867839 BCX0\"><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">The tools used to perform this analysis include infrared and Raman spectroscopy for chemical composition, UV-Visible spectroscopy for color and optical transmissivity, and thermal analysis for determination of physical properties.<\/span><\/span><\/p>\n<\/div>\n<div class=\"OutlineElement Ltr BCX0 SCXW7867839\">\n<p class=\"Paragraph SCXW7867839 BCX0\"><span class=\"TextRun SCXW7867839 BCX0\" data-contrast=\"auto\"><span class=\"NormalTextRun SCXW7867839 BCX0\">It turned out that a switch of suppliers for the polycarbonate molded plastic covers led to failures of a precision optical measurement device. Ambient light leaking into the device caused erroneous measurements for low light level measurements. Diffuse transmission measurement of the parts by UV-Visible spectroscopy confirmed that the failed cover did not meet the specification for maximum transmittance.<\/span><\/span><span class=\"EOP SCXW7867839 BCX0\" data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p class=\"Paragraph SCXW7867839 BCX0\">Follow the <a href=\"http:\/\/bit.ly\/2TdLKmU\" target=\"_blank\" rel=\"noopener noreferrer\">mystery failure analysis<\/a> as this application note details the root cause analysis of the polycarbonate cover, made of an acrylonitrile butadiene styrene (PC-ABS) blend, using UV-Vis spectroscopy, thermal gravimetric analysis (TGA), infrared and FT-Raman spectroscopy.\u00a0 The root cause of the failure tracked with the lower rutile content, and corrective action was implemented.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>It\u2019s almost inevitable: a new supplier begins supplying the exact same part as the old supplier, and \u2013 you guessed it \u2013 the\u00a0product\u00a0begins to fail\u00a0in the field. Manufacturers employing plastic parts routinely face the challenge of analyzing failed parts to determine the root cause and corrective actions. In this application note, our story follows a<\/p>\n","protected":false},"author":835,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[958,961,977,968,980],"tags":[955],"division":[],"class_list":{"0":"post-10115","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-failure-analysis","7":"category-process-control","8":"category-raman-spectroscopy","9":"category-spectroscopy-spectrometry","10":"category-uv-vis","11":"tag-polymer-plastics","12":"entry"},"_selected_authors":[],"_selected_reviewers":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.8 (Yoast SEO v27.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What changed? 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A comprehensive analysis of polymeric failure\" \/>\n<meta property=\"og:description\" content=\"Explore comprehensive polymer failure analysis using complementary analytical techniques to identify material changes, defects, and causes of product failure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.thermofisher.com\/blog\/materials\/what-changed-a-comprehensive-analysis-of-polymeric-failure\/\" \/>\n<meta property=\"og:site_name\" content=\"Advancing Materials\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/thermofisher\" \/>\n<meta property=\"article:published_time\" content=\"2019-03-19T16:13:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-18T20:15:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kapost-files-prod.s3.amazonaws.com\/kapost\/590ba94f7f71ec0004002379\/studio\/content\/5c9110be17dc910062000080\/html_bodies\/1553011888-8235f964-d391-4497-9d2a-14e10b6a67ba\/Confused%20Man.jpg\" \/>\n<meta name=\"author\" content=\"Olivia Baum\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@thermofisher\" \/>\n<meta name=\"twitter:site\" content=\"@thermofisher\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Olivia Baum\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.thermofisher.com\\\/blog\\\/materials\\\/what-changed-a-comprehensive-analysis-of-polymeric-failure\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.thermofisher.com\\\/blog\\\/materials\\\/what-changed-a-comprehensive-analysis-of-polymeric-failure\\\/\"},\"author\":{\"name\":\"Olivia Baum\",\"@id\":\"https:\\\/\\\/admin.acceleratingscience.com\\\/materials\\\/#\\\/schema\\\/person\\\/34fef35fe7530dce246694ee3e8e69c8\"},\"headline\":\"What changed? 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