Thermal Characterization of Polymer Systems

Thermal characterization of polymer systems is pivotal for understanding how polymer structure and morphology govern heat-related behaviour. By measuring properties such as thermal conductivity, heat capacity and transition temperatures, researchers elucidate phase transitions, crystallisation kinetics and degradation pathways. Key thermal events include the glass transition, melting and cold crystallization, which reflect chain mobility, intermolecular interactions and crystalline order. Techniques such as differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA) provide complementary insights into enthalpic and entropic changes, mass loss and mechanical damping. Thermal conductivity measurements, often performed by frequency-domain thermoreflectance or steady-state methods, reveal how heat flows through amorphous regions, crystalline domains and composite interfaces. Advances in thermal characterisation have enabled optimisation of polymers for electronic packaging, thermal interface materials, flame retardancy and biomedical devices. By correlating molecular architecture—such as side-chain length, cross-link density and filler dispersion—with heat-flow behaviour, the field supports the design of polymers with tailored thermal stability, conductivity and energy-absorption capabilities.

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Thermal Characterization of Polymer Systems publication trend

The graph below shows the total number of articles in thermal characterization of polymer systems across all publications each year (not limited to Nature Index journals).

Technical terms

Thermal conductivity: A measure of a material’s ability to conduct heat, typically expressed in watts per metre-kelvin (W·m⁻¹·K⁻¹).

Differential Scanning Calorimetry (DSC): A technique that measures heat flow into or out of a sample as it is heated or cooled, used to detect transitions such as melting and crystallisation.

Glass transition temperature (Tg): The temperature at which an amorphous polymer transitions from a hard, glassy state to a softer, rubbery state due to increased chain mobility.

Crystallisation kinetics: The rate and mechanism by which polymer chains organise into ordered, crystalline domains upon cooling or annealing.

Anisotropy ratio: The ratio of thermal conductivities measured along different axes, indicating directional dependence of heat transport.

Phonon scattering: The interaction of heat-carrying lattice vibrations with defects, grain boundaries or interfaces, which reduces thermal conductivity.

References

1. Anisotropic Thermal Conductivity in Imine-Linked Two-Dimensional Polymer Films Produced by Interfacial Polymerization. ACS Nano (2025).
2. New insight into the melting process of PA 6 fibers: Determining tension-induced changes of enthalpy by HTA-assisted DSC analysis. Polymer Testing (2023).
3. Bottlebrush Elastomers with Crystallizable Side Chains: Monolayer-like Structure of Backbones Segregated in Intercrystalline Regions. Polymers (2024).