Affiliation:
1. Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Kyoto Japan
2. Fusion Oriented Research for Disruptive Science and Technology Program (FOREST) Japan Science and Technology Agency (JST) Saitama Japan
3. Materials Innovation Lab Kyoto Institute of Technology Kyoto Japan
Abstract
AbstractCage silsesquioxanes, also known as polyhedral oligomeric silsesquioxanes (POSS), serve as crucial building blocks in crafting precisely designed organic–inorganic hybrid materials, given that their well‐defined silsesquioxane clusters can be adorned with organic substituents. While polymers with POSS in their main chains have been thoroughly examined, analyzing the correlation between cage structure and material properties in main‐chain‐type polymers remains challenging. This difficulty stems from the limited range of organic substituents on traditional POSS monomers, thereby precluding comparisons between polymers with unified substituents and different cage structures. In this study, we synthesized double‐decker silsesquioxane (DDSQ) and side‐opened POSS (SO‐POSS) monomers, both featuring phenyl groups. Subsequent platinum‐catalyzed hydrosilylation polymerization yielded main‐chain‐polymers. Both the cage and linker structures influence thermal stability and the glass transition temperature, while the hardness was primarily determined by the linker structure. This research is the first to elucidate the impact of cage structure on the material properties of main‐chain‐type POSS polymers.
Funder
Japan Society for the Promotion of Science
Subject
Materials Chemistry,Polymers and Plastics,Physical and Theoretical Chemistry