A novel acid promoted ring-opening polymerization of a seven-membered cyclic carbonate initiated with BCl3

Abstract

Ring‐opening polymerization of a seven‐membered cyclic carbonate, 1,3‐dioxepan‐2‐one, was investigated with a novel initiator system, BCl3‐HCl·Et2O. Addition of HCl·Et2O promoted the polymerization even at 0°C to produce the corresponding polycarbonate with controlled molecular weight and narrow polydispersity ratio (< 1.2).

Functionalized Polycarbonate Derived from Tartaric Acid: Enzymatic Ring-Opening Polymerization of a Seven-Membered Cyclic Carbonate

“…Five- and six-membered cylic carbonate monomers have been polymerized via ROP. , The polymerization of five-membered cyclic carbonate usually is associated with extensive decarboxylation resulting in undesirable ether linkages . The polymerization of six-membered cyclic carbonate and its derivatives proceeds with minimal decarboxylation in the polymer chain, and therefore, they are the most studied and have been polymerized by anionic, cationic, and enzymatic catalysts. − Although aliphatic ROP of larger ring size carbonates have been demonstrated in the literature, , there are only a few examples of polymerization of a seven-membered cyclic carbonates. The most studied seven-membered cyclic carbonate monomer, 1,3-dioxepan-2-one (7CC), has been polymerized by both anionic and cationic catalysts. , The interest in the seven-membered cyclic carbonate stems from its higher polymerizability compared to smaller size ring carbonates. ,, Many copolymers of 7CC have been synthesized such as poly(7CC-co-δ-VL), poly(7CC-co-ϵ-CL), and poly(TOX-co-7CC-OTM) …”

Cationic Copolymerization Behavior of Glycidyl Phenyl Ether with Seven‐Membered Cyclic Carbonate

“…[5][6][7][8][9][10] Homopolymerization of sixand seven-membered cyclic carbonates (6CC and 7CC) have been reported before. [1,3,[11][12][13][14][15][16][17][18][19][20] A typical property of cyclic carbonates is their volume expansion during polymerization in contrast to the usual contracting monomers such as vinyl monomers; [21,22] therefore, the cyclic carbonates are regarded as versatile monomers from the viewpoint of precise molding. In the field of material science, the copolymerization of the cyclic carbonates with other monomers as a means of controlling volume shrinkage is an important application.…”