Evaluation of mechanical properties and hydrophobicity of <scp>room‐temperature</scp> , <scp>moisture‐curable</scp> polysilazane coatings

Polysilazane coatings have a broad need in real-life applications, which require low processing or working temperature. In this work, five commercially available polysilazanes been spin-coated on polycarbonate substrates and cured ambient environment temperature to obtain transparent, crack-free, dense films. The degree of crosslinking is found significant impact the hardness Young's modulus polysilazane films but has minor influence film thickness hydrophobicity. Among all coatings, inorganic perhydropolysilazane-based coating exhibits largest (2.05 ± 0.01 GPa) (10.76 0.03 after 7 days curing, while polyorganosilazane-derived exhibit higher molecular structure plays key role mechanical properties hydrophobicity associated films, as well adhesion substrates, providing an intuitive reliable way for selecting suitable material specific application.