We have just published the results of MSc Kasia Mitula PhD research concerning the synthesis of Tri(alkenyl)functional Open-Cage Silsesquioxanes.
It is a report on efficient synthetic route leading to trifunctionalized, open-cage silsesquioxanes with alkenyl groups of varying chain lengths from vinyl to dec-9-enyl and two types of inert groups (iBu, Ph) at the silsesquioxane core. Additionally, a thorough characterization of the obtained compounds was performed, also in terms of their thermal stability, melting and crystallization temperatures (TGA and DSC) to show the changes in the abovementioned parameters dependent on the type of reactive as well as inert groups at Si-O-Si core.

K. Mituła, M. Dutkiewicz, J. Duszczak, M. Rzonsowska, B. Dudziec,
Preparation of tri(alkenyl)functional open-cage silsesquioxanes as specific polymer modifiers
Polymers 2020,  12(5), 1063 DOI: 10.3390/polym1205106