Analysis of degradation of PVC pipe using Fourier Transform Infrared Spectroscopy (FTIR)

Efficacy of phthalate plasticizers in p-PVC varies with change in the surrounding, causing failure of PVC components used in various applications. ATR-FTIR, evaluating the presence of carbonyl groups, is used for the structural analysis of p-PVC components before and after heat treatment of samples.

Last Updated: September 8th, 2023 First Published :


FTIR analysis is used to study the migration and leaching of phthalate plasticizers from p-PVCs. Phthalate plasticizers are frequently used in PVC applications to achieve the intended flexibility and performance of the PVC. Understanding these plasticizers’ efficacy under increased temperature, radiation, electrical field changes, etc., is critical to avoid failure of components, contamination, and reduced performance. An ATR-FTIR is used for the structural analysis of components of p-PVC before and after heat treatment. 

The effects of temperature treatment on the migration of various phthalate plasticizer modified PVC were studied. FTIR provides rapid qualitative analysis of unknown or known compounds utilizing the vast library of available spectra. Spectral matching reveals phthalate plasticizers’ diffusion by identifying and quantifying the carbonyl functional group (C=O) present in these plasticizers (Figure 1) A significant drop in the concentration of this functional group before and after heat treatment of PVC, modified with various phthalate plasticizers, is observed [Fig. 1 (a) & (b)]. This reduction provides evidence that these plasticizers are consumed at higher temperatures.

Fig. 1. FTIR spectra of PVC modified with phthalate plasticizers before (a) and after (b) thermal treatment of 160 C for 440 minutes. Reference [1]

Chemical migration into the surrounding atmosphere or other components like seals and fixtures due to aging and environmental degradation is a frequent problem in product manufacturing, litigation, and materials research. Infinita Lab’s vast network of materials testing labs and experts enables us to produce reliable, reproducible, and highly sensitive measurements for identifying and quantifying known or unknown chemicals even at low concentrations. 


[1] Tüzüm Demir, A.P. and Ulutan, S. (2013), Migration of phthalate and non‐phthalate plasticizers out of plasticized PVC films into air. J. Appl. Polym. Sci., 128: 1948-1961.

Need help or have a question?
Case Study In-depth examination of genuine material testing solutions
Dopant and ultra-low concentration elemental analysis using Scanning…

EELS analysis of gate and channel is performed on fin field-effect transistors (finFETs). Scanning transmission electron…

Learn More
Analysis of degradation of PVC pipe using Fourier…

FTIR analysis is used to study the migration and leaching of phthalate plasticizers from p-PVCs. Phthalate…

Learn More
Nano-scale roughness measurement of Si-wafers by Atomic Force…

Nano-scale surface roughness is a critical parameter in fabricated thin-films that are used in optics, solar…

Learn More
See all Case Study

Looking for Material Testing?

We have already delivered 10000+ Material Test results to top companies

    Free Consultation? - Talk to our experts

    (888) 878-3090

    Send us a request

      Process for testing
        STEP 01

        You share material and testing requirements with us

        STEP 02

        You ship your sample to us or arrange for us to pick it up.

        STEP 03

        We deliver the test report to your email.

        Let’s work together!

        Share your testing requirements with us and we will be happy to assist you.

        ddd Just share your testing requirements and leave the rest on us!
        • Quick Turnaround and Hasslefree process
        • Confidentiality Guarantee
        • Free, No-obligation Consultation
        • 100% Customer Satisfaction


          Let us combine our capabilities to achieve success!!

            idea icon
            Want to connect with an expert before you leave?