Silicon-Containing Polymers and Their Thermal Properties

Silicon-containing polymers combine organic backbones with silicon–oxygen or silicon–carbon linkages, encompassing polysiloxanes, silicone elastomers, silylene-based resins and silicon–arylacetylene copolymers. The incorporation of silicon endows these materials with exceptional thermal characteristics, including elevated glass transition temperatures, high decomposition thresholds, low flammability and significant char yields. Such properties arise from the strength of Si–O and Si–C bonds, the rigidity of aromatic segments and tailored side groups that enhance intermolecular dispersion forces. Applications span aerospace thermal protection systems, high-temperature electronics encapsulation and advanced composites for energy and defence sectors. Contemporary research focuses on molecular architecture—branching, block sequences and functional substituents—to optimise rheological behaviour, processability and thermal stability. These innovations address the growing demand for lightweight, high-performance polymers capable of withstanding extreme thermal environments.

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Silicon-Containing Polymers and Their Thermal Properties publication trend

The graph below shows the total number of articles in silicon-containing polymers and their thermal properties across all publications each year (not limited to Nature Index journals).

Technical terms

Glass transition temperature (T_g): The temperature at which an amorphous polymer transforms from a glassy, rigid state to a more rubbery, flexible state.

Degradation temperature at 5 % weight loss (T_d5): The temperature at which a polymer sample loses 5 % of its initial mass under controlled thermal analysis, indicating the onset of decomposition.

Char yield: The proportion of residual solid material remaining after complete thermal decomposition, reflecting a polymer’s ability to form a protective carbonaceous layer at high temperatures.

Dispersion forces: Weak intermolecular attractions arising from transient dipoles, contributing to enhanced thermal resistance in polymer networks.

Block copolymer: A polymer comprising two or more chemically distinct segments arranged in contiguous blocks, enabling phase separation and property modulation.

References

1. Impacts of Vinyl Group on the Diffusion and Thermal Properties of Branched Silicon-Containing Arylacetylene Resins by Molecular Dynamics Simulations. Molecules (2024).
2. Synthesis and Characterization of Block Copolymers of Poly(silylene diethynylbenzen) and Poly(silylene dipropargyl aryl ether). Polymers (2021).