Fast, affordable solutions for polymers and plastics analysis

Significance of the Topic

Rapid, reliable characterization of polymers is central to quality control, formulation development, and failure analysis across plastics manufacturing, packaging, automotive, and medical-device industries. Fourier-transform infrared (FTIR) spectroscopy, paired with attenuated total reflectance (ATR) or controlled-thickness transmission films, provides fast identification of polymer types, quantification of co‑polymer ratios, and measurement of additives (release agents, UV stabilizers, plasticizers). Kits that combine standardized sampling accessories with targeted software and spectral libraries lower the barrier to routine, quantitative polymer analysis in production and R&D laboratories.

Objectives and Overview of the Kit

The Thermo Scientific FTIR Polymer Analysis Kits are designed to deliver an integrated, affordable workflow for polymer identification and quantitation using existing Thermo Scientific Nicolet FTIR spectrometers. Objectives of the kits include:

• Enable rapid verification of polymer identity and co‑polymer blend ratios.
• Provide quantitative measurement of additives across incoming, in‑process and finished materials.
• Offer reproducible sample preparation for transmission measurements (constant film thickness) and flexible ATR analysis for direct solid and film interrogation.
• Combine hardware, sample preparation tools and a large spectral knowledge base with multi‑component search capability to streamline routine analyses.

Used Instrumentation

• OMNIC Specta Polymer Package: software with a library of >13,000 spectra (polymers, additives, plasticizers) and a patented multi‑component search for mixture analysis, plus a Knowledge Base on polymer IR characteristics.
• Single‑bounce ATR accessories: ZnSe crystal (recommended for soft polymers such as polyethylene and EVA), diamond crystal (for broader hardness range including nylon and glass‑filled polyesters), and optional germanium crystal (to improve analysis of carbon‑black filled materials).
• Mini‑Film Maker: bench‑top heated press (up to 250 °C) to produce reproducible transmission films at selectable thicknesses (50, 100, 250, 500 µm) and 10 mm aperture sampling cards for archiving.
• Compatibility: kits configured for Thermo Scientific Nicolet FTIR spectrometers (iS5, iS20, iS50 series and other models that accept Smart Accessories); spectrometer sold separately.

Methodology and Practical Workflow

The kit supports two complementary FTIR approaches:

• ATR analysis: Direct measurement of solid samples and films using a single‑bounce ATR. Advantages include minimal sample preparation, fast identification, and quantitative methods for co‑polymer ratios and high‑concentration additives. Choice of ATR crystal optimizes contact depth and sensitivity for different material types and fillers.
• Transmission film analysis: Use the Mini‑Film Maker to melt and press polymer samples into constant‑thickness films for transmission FTIR. This approach yields more reproducible pathlengths and improved quantitative accuracy for low‑level additives, crystallinity assessment, and monomer ratio determination in copolymers.

Spectral processing and quantitation are performed in OMNIC Specta using the multi‑component search to deconvolute mixtures against the extensive spectral library. Typical workflow steps: sample selection → ATR measurement or film preparation → spectral acquisition on FTIR spectrometer → library search / mixture analysis → quantitation using calibration models or spectral regression.

Main Capabilities and Discussion

The Polymer Analysis Kits are presented in multiple configurations to match analytical needs:

• Basic ATR Polymer Kit: optimized for rapid unknown material identification and bulk ingredient verification in soft materials.
• Advanced ATR Polymer Kit: extends capability to quantitative low‑level additive analysis and broader material hardness ranges.
• Combo Kits: combine ATR and Mini‑Film Maker options to provide flexible workflows for both rapid screening and accurate quantitative transmission work.
• Mini‑Film Maker Kit: focused on quantitative transmission measurements, crystallinity and copolymer monomer ratio analysis.

Key performance features summarized from the product documentation include the ability to produce reproducible transmission films (four thickness options), a large curated spectral database supporting mixture analysis, and accessory selections tailored to filled or otherwise challenging matrices (germanium ATR for carbon‑black filled samples). The documentation emphasizes speed, reproducibility and compatibility with routine QC environments rather than novel research‑grade performance metrics; specific limits of detection or validation data are not provided in the brochure and will depend on instrumentation, sample matrix and calibration practice.

Benefits and Practical Applications

• Quality control of incoming raw materials, in‑process intermediates, and finished polymer products.
• Verification of co‑polymer blend ratios and detection/quantification of additives such as stabilizers, plasticizers, and release agents.
• Formulation development and reverse engineering by identifying constituent polymers and typical additives.
• Compact bench‑top footprint and standardized sample cards facilitate routine operation and archiving.
• Preconfigured software libraries and multi‑component search reduce setup time and improve analyst productivity.

Future Trends and Opportunities

Several directions can enhance the utility of FTIR polymer analysis kits:

• Integration of chemometrics and machine‑learning models to improve quantitation in complex, filled matrices and to accelerate model transfer between sites.
• Expansion of spectral libraries with curated reference materials and metadata (processing history, molecular weight, crystallinity) to support more accurate identifications.
• At‑line and in‑line ATR probes coupled to process FTIR systems for real‑time monitoring of polymerization, curing and additive dosing.
• Hybrid approaches combining FTIR with thermal analysis (DSC, TGA) or Raman to provide complementary insights into crystallinity, phase behavior and filler interactions.
• Automation of film preparation and spectral acquisition for higher throughput QC laboratories.

Conclusion

Thermo Scientific FTIR Polymer Analysis Kits package targeted hardware, a large spectral knowledge base and application‑oriented software to deliver practical solutions for polymer identification and quantitative analysis. By offering ATR and controlled‑thickness transmission options, these kits address a broad set of routine QC and R&D tasks—co‑polymer ratio verification, additive quantification, and formulation work—while maintaining a compact footprint and a workflow suited to production laboratories. Effective implementation requires instrument qualification, method calibration for specific matrices, and validation of analytical limits for the target analytes.

References

• Thermo Fisher Scientific. Thermo Scientific FTIR Polymer Analysis Kits — product brochure. 2018.
• Thermo Fisher Scientific. OMNIC Specta Polymer Package documentation and Infrared Spectroscopy of Polymers knowledge base.
• United States Patent 7,698,098.