# Multicatalytic Access to Renewable Poly(Silyl Ether)s with Tunable Properties

## TL;DR

Scientists developed a new way to make eco-friendly polymers with adjustable properties using a one-step process that combines two chemical reactions.

## Contribution

A novel one-pot multicatalytic method for synthesizing bio-based poly(silyl ether)s with tunable mechanical and thermal properties.

## Key findings

- Polymers achieved elongation at break exceeding 3800% due to flexible siloxane segments and dynamic silyl ether linkages.
- The method enables efficient chemical recycling and reduces purification steps, enhancing sustainability.
- The process allows for high molecular weight and tunable architectures with broad monomer compatibility.

## Abstract

The global reliance on petroleum‐based polymers presents urgent sustainability challenges. Addressing this issue, we present a novel one‐pot multicatalytic strategy for synthesizing partially bio‐based poly(silyl ether)s with tunable properties. This method combines magnesium‐catalyzed esterification of bio‐based diacids and alcohols with borane‐catalyzed hydrosilylation under mild conditions. This approach enables direct incorporation of ester functionalities into the polymer backbone, affording high‐molecular‐weight poly(silyl ether)s with tunable architectures and thermal profiles. The method demonstrates excellent catalyst compatibility and scalability, significantly reducing purification steps while broadening monomer scope. Beyond thermal robustness, the resulting materials exhibit remarkable mechanical performance. Preliminary tensile tests revealed distinctive deformation behavior, with certain polymers achieving extraordinary extensibility (elongation at break > 3800%) and high energy absorption, attributed to the synergistic interplay between flexible siloxane segments and dynamic silyl ether linkages. Degradation studies confirm efficient chemical recycling, underscoring the potential of this one‐pot process to deliver sustainable, high‐performance polymers with customizable properties for advanced applications.

This work presents a one‐pot, multicatalytic approach that combines magnesium‐catalyzed esterification and borane‐mediated hydrosilylation for the synthesis of partially bio‐based poly(silyl ethers). This method allows for the tuning of thermal and mechanical properties, including exceptional extensibility (>3800%), and enables efficient chemical recycling, thus advancing sustainable polymer design.