A systematic investigation of the ring size effects on the free radical ring-opening polymerization (rROP) of cyclic ketene acetal (CKA) using both experimental and theoretical approach was written by Reddy Mothe, Srinivasa;Tan, Jacqueline S. J.;Chennamaneni, Lohitha R.;Aidil, Farhan;Su, Yi;Kang, Hway C.;Lim, Freda C. H.;Thoniyot, Praveen. And the article was included in Journal of Polymer Science (Hoboken, NJ, United States) in 2020.SDS of cas: 2568-30-1 This article mentions the following:
Radical ring-opening polymerization (rROP) reaction of cyclic ketene acetals (CKA) is an interesting route to biodegradable polymers. Contrary to their tremendous potential, fundamental understanding of their reaction kinetics and thermodn. is still limited. We present exptl. and theor. investigations for rROP reactions of CKA to systematically elucidate the effects of monomer ring sizes on the homopolymerization We aim to provide insights on the structural-reactivity relationship of CKA by studying the thermodn. and kinetics of the forward ring-opening propagation reactions and key side reactions, namely ring-retained propagation and radical back-biting reaction leading to branching. Exptl. results show that for the CKA with smaller ring sizes, significant amount of ring-retained side products are formed when up to 90% of the monomers are converted. However, for the larger ring sizes (7 and 8 membered), almost complete ring-opening polymerization with <1% of ring-retained products are formed. D. functional theory (DFT) calculations show that kinetic effects from the collision frequency dominate in differentiating between ring-opening propagation, ring-retained propagation, and backbiting. The results corroborate well with experiments and reports in the literature. Our systematic study from the first principle and exptl. validation provide insights into CKA rROP to apply radical polymerization to generate biodegradable polymers. In the experiment, the researchers used many compounds, for example, 2-Chloromethyl-1,3-dioxolane (cas: 2568-30-1SDS of cas: 2568-30-1).
2-Chloromethyl-1,3-dioxolane (cas: 2568-30-1) belongs to dioxole derivatives. Dioxoles, particularly fluorinated dioxoles, are used as co-monomers to make polymers that find use in forming protective coatings for chemical resistance. Dioxole functionalized metal-organic frameworks have also been recently reported.SDS of cas: 2568-30-1
Referemce:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem