Hyperbranched, Functional Polyethoxysiloxanes: Tunable Molecular Building Blocks.

ABSTRACT: Functional silanes are multifaceted cross-linkers, compatibilizers, coupling agents, and surface modifiers. Herein, we present organofunctional polysiloxane building blocks that offer great versatility in terms of molecular weight, degree of condensation, and the choice and loading of organic substituent groups. The organofunctional polyethoxysilanes (funPEOS) are prepared in a one-pot, two-step process: synthesis of the PEOS carrier/substrate, followed by grafting a functional silane "shell", both based on condensation with acetic anhydride. The reaction was optimized at the lab scale and scaled up to a 7 L reactor. The acetylation, condensation, and hyperbranched structure of the carrier were confirmed by ²⁹Si NMR, while ²⁹Si-²⁹Si 2D INADEQUATE NMR provid

SUBMITTER: Nemec M 

PROVIDER: S-EPMC11217919 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature