AI Article Synopsis
- Topological polymers offer advantages over linear polymers, but no topological poly(monothiocarbonate)s have been previously reported.
- A new method allows for the synthesis of branched poly(monothiocarbonate)s through a "grafting through" process using carbonyl sulfide and epichlorohydrin, where side-chains form during the reaction and their lengths can be adjusted by changing the temperature.
- The resulting branched copolymers exhibit improved thermal properties, with a notable increase in the T value compared to their linear counterparts, particularly when using chiral epichlorohydrin.
Article Abstract
Topological polymers possess many advantages over linear polymers. However, when it comes to the poly(monothiocarbonate)s, no topological polymers have been reported. Described herein is a facile and efficient approach for synthesizing well-defined branched poly(monothiocarbonate)s in a "grafting through" manner by copolymerizing carbonyl sulfide (COS) with epichlorohydrin (ECH), where the side-chain forms in situ. The lengths of the side-chains are tunable based on reaction temperatures. More importantly, enhancement in thermal properties of the branched copolymer was observed, as the T value increased by 22 °C, compared to the linear analogues. When chiral ECH was utilized, semicrystalline branched poly(monothiocarbonate)s were accessible with a T value of 112 °C, which is 40 °C higher than that of the corresponding linear poly(monothiocarbonate)s. The strategy presented herein for synthesizing branched polymers provides efficient and concise access to topological polymers.
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| http://dx.doi.org/10.1002/anie.202005806 | DOI Listing |
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