Heterotelechelic Silicones: Facile Synthesis and Functionalization Using Silane-Based Initiators.

ABSTRACT: The synthetic utility of heterotelechelic polydimethylsiloxane (PDMS) derivatives is limited due to challenges in preparing materials with high chain-end fidelity. In this study, anionic ring-opening polymerization (AROP) of hexamethylcyclotrisiloxane (D₃) monomers using a specifically designed silyl hydride (Si-H)-based initiator provides a versatile approach toward a library of heterotelechelic PDMS polymers. A novel initiator, where the Si-H terminal group is connected to a C atom (H-Si-C) and not an O atom (H-Si-O) as in traditional systems, suppresses intermolecular transfer of the Si-H group, leading to heterotelechelic PDMS derivatives with a high degree of control over chain ends. In situ termination of the D₃ propagating chain end with commercially available

SUBMITTER: Okayama Y 

PROVIDER: S-EPMC10653272 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature