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聚合物

聚合物在现代材料科学中起着关键作用。由于其不同的机械和化学性能,它们几乎被用于每一个应用领域,从日常用品到汽车零部件和高性能材料。它们的多功能性和复杂性对于创造可持续的下一代材料至关重要,这些材料旨在满足特性和定制生产过程中日益复杂的需求。我们的拉曼显微镜通过在纳米尺度上提供全面的、非破坏性的样品分析,并提供对化学和物理属性的详细见解,支持这一创新。这有助于研究人员和工程师加速创新和发现,并确保高质量和高效的产品开发。

Our modular systems can combine Raman imaging with additional imaging techniques, including AFM, SNOM or SEM, to gain more comprehensive insights into your polymer materials. While Raman imaging captures molecular information, AFM characterizes the topography and properties such as stiffness and adhesion of the sample’s surface. SNOM allows optical measurements to extend beyond the diffraction limit, and RISE integrates Raman with SEM for ultimate chemical sensitivity and structural resolution. All instrument configurations can be upgraded at any time to accommodate new or expanded requirements.

Read more about correlative Raman imaging of polymer materials in our Application Note.

Raman AFM images of a polymer blend (same sample area).
Raman AFM images of a polymer blend (same sample area).
RISE Microscopy (Raman-SEM) of a polymer blend.
RISE Microscopy (Raman-SEM) of a polymer blend.

Monitoring polymerization reactions with Raman microscopy

Polymerization reactions play a crucial role in many manufacturing processes. Scientists involved in polymer research and industrial manufacturing need analytical methods that can visualize the intricacies of these reactions to optimize both the processes and the final products. Raman microscopy serves as a beneficial tool for in-situ observation of these polymerization reactions. For instance, Raman imaging allowed us to observe the polymerization of an alkyd resin varnish over a 24-hour period, and to visualize the spatial distribution of the reaction components at each individual time point.

Read more about the measurement here.

The video shows the polymerization reaction of an alkyd resin varnish monitored over 24 hours by Raman depth scans. It reveals the distribution of liquid varnish (red), polymerized product (blue), glass substrate (green) and air (black).

Polarization-resolved Raman analysis of fibre alignment in polyethylene

The molecular structure and arrangement of polymer fibres within plastic materials significantly influences the polymer’s physical properties such as stability, flexibility and transparency. Polarization-resolved Raman analyses can help determine the material’s molecular structure and identify the orientation of the polymer fibres. In a study conducted at the Swiss Federal Laboratories of Materials Science and Technology (Empa), we used polarization-resolved Raman microscopy to resolve the orientation of polyethylene fibres in a plastic wrap. This allowed us to characterize the alignment of fibres within the material under stretching conditions.

Learn more about our polarization-resolved imaging options and read more about the study in our Technical Note.

3D heatmaps of the Raman signal in unstretched (left) and stretched polyethylene (right) at different polarization angels. The stretched condition shows the polarization dependency of the Raman modes for symmetrical C-C stretching (1130 rel. cm-1), CH2 bending (1417, 1441 and 1464 rel. cm-1), and C-H stretching (2849 and 2883 rel. cm-1), revealing the high alignment of the polyethylene fibres.

Microplastic particle analysis using ParticleScout

Microplastic particles in an environmental sample. Overlay of the Raman and Brightfield image.

For a simplified analysis of microplastic particles, discover our ParticleScout imaging option. ParticleScout delivers prompt and straightforward Raman results, allowing for the precise characterization and identification of microplastics in samples from environmental science, food technology, pharmaceuticals, cosmetics and industrial applications.

Microplastic particles in an environmental sample. Overlay of the Raman and Brightfield image.
Image from: Kernchen, Sarmite, et al. "Atmospheric deposition studies of microplastics in Central Germany." Air Quality, Atmosphere & Health 17.10 (2024): 2247-2261. Licenced under Creative Commons CC-BY 4.0

Literature

Application Note Correlative Raman Imaging in Polymer Research

Application Note ParticleScout

Technical Note Polarization-resolved Microscopy and Spectroscopy Solutions


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