Synthesis and Efficient Purification of Cyclic Poly(dimethylsiloxane)

Scalable Synthetic Route to PDMS Ring Polymers in High Yields from Commercially Available Materials Using the Piers-Rubinsztajn Reaction

While cyclic polymers have intrigued researchers for their novel set of architecture-driven rheological interactions, the possibility of incorporating them in topological systems has been limited by the availability of large ring polymers. Thus, the need for scalable methods to produce ring polymers has become apparent. Here, a facile method to prepare polysiloxane ring polymers by means of Piers-Rubinsztajn chemistry is presented. The one-pot nature and commercial availability of reagents additionally confirm the applicability of the method for large-scale production. Furthermore, a highly efficient yet simple purification method was developed for the isolation of pure ring polymers without linear side products.

High molecular weight cyclic polysiloxanes from organocatalytic zwitterionic polymerization of constrained spirocyclosiloxanes

A new cyclic polysiloxane molecule with high molecular weight was prepared through zwitterionic polymerization of constrained spirocyclosiloxanes.

Chemoselective synthesis of macrocyclic poly(methylvinylsiloxane)s via metathetical ring-expanding polymerization of oligomeric cyclosiloxanes by sequential (MeVinylSi-O-) insertion reactions

Macrocyclic poly(methylvinylsiloxane)s were synthesized chemoselectively.