Perfluoropolyether Potting Material Low-Temperature Flexibility

The patent changes the chemical structure parameters of the fluoropolyether compound by introducing specific perfluoroalkyl groups (C2F5, C3F7, C4F9) at defined positions in the polymer chain. This structural modification alters the thermal and mechanical properties, enabling the cured product to maintain rubber properties at low temperatures while achieving high-temperature stability without decomposition.

The patent creates a composite molecular structure by combining the fluoropolyether backbone with specific perfluoroalkyl side groups. This composite approach integrates the beneficial properties of both the polyether chain (flexibility, rubber properties) and the perfluoroalkyl groups (thermal stability, chemical resistance), resolving the contradiction between low-temperature usability and high-temperature stability.

The patent applies local quality modification by placing specific perfluoroalkyl groups (C2F5, C3F7, C4F9) at particular positions within the polymer chain rather than uniformly throughout. This localized structural enhancement provides thermal stability where needed while preserving the overall flexibility and rubber properties of the cured product at low temperatures.

The patent modifies the molecular structure parameters by introducing fluorine atoms at specific positions along the polymer chain, creating a gradient of chemical properties. This parameter change enables the material to exhibit both high-temperature stability and low-temperature flexibility simultaneously, as the fluorine substitution ratio and positioning are optimized to balance these opposing requirements.