Cu-based atom transfer radical polymerization of methyl methacrylate using a novel tridentate ligand with mixed donor atoms

Abstract

This study is aimed at atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) using a novel catalyst. The bis-(2-dodecylsulfanyl-ethyl)-amine (SNS) tridentate ligand with mixed donor atoms was synthesized in high purity using inexpensive reagents and was reacted with copper(I) bromide to produce the CuBr/SNS catalyst. The catalyst mediated living polymerization of MMA yielding polymers with controlled molecular masses and narrow molecular mass distributions (PDI < 1.25). Also, the kinetic plot exhibited a linear increase of ln([M]0/[M]) versus time, indicating constant concentration of propagating radicals during the polymerization. The products were characterized by 1 H NMR, 13 C NMR, FT-IR, UV-VIS, GC and elemental analyses (CHNS) and by GPC.

Efficient removal of dyes by light‐responsive graphene oxide‐blended polyethersulfone nanofiltration membranes

“…According to Figure 2, in the FT‐IR spectrum of SP, peaks at 3380, 3066, and 2962 cm −1 belong to OH, CH 2( SP 2 stretch) , and CH 2( SP 3 stretch) . The peaks at 1606 and 1479 cm −1 are associated with CC 29 . The absorption peaks at 1509 and 1334 cm −1 are due to the aryl NO 2 groups.…”

“…. The peaks at 1606 and 1479 cm À1 are associated with C C. 29 The absorption peaks at 1509 and 1334 cm À1 are due to the aryl NO 2 groups. Other peaks at 1087 and 950 cm À1 correspond to the C O, and CH out of-plane bend .…”

Demulsification of Crude Oil Emulsions Using Versatile and Eco-Friendly Demulsifiers Based on Cellulose Decorated with Imidazolium-Bearing Triazole Moiety

“…We recently introduced microcrystalline cellulose modified by imidazolium ILs as an efficient demulsifying agent for breaking W/O emulsion . Aromatic azides such as triazole heterocycles are efficient intermediates with various applications in organic and bioorganic chemistry due to their high energy and biological properties. − Triazole rings are highly polar and can be combined with imidazolium ILs to prepare ILs with novel properties. Ritter and Gonsior in 2011 reported a new class of polyelectrolytes based on cellulose and ILs via click chemistry .…”

Synthesis of cardanol-based photo-active SET-LRP initiator and its application to preparation of UV-cured resin

“…Reversible de-activation radical polymerisation (RDRP) such as atom transfer radical polymerisation (ATRP) and reversible addition-fragmentation chain transfer (RAFT) polymerisation have seen rapid development over the past decades due to their outstanding advantages in "accurate" designing and preparation of complicated polymers with topological architectures (Król & Chmielarz, 2014;Matyjaszewski & Tsarevsky, 2014;Saghatchi et al, 2014;Cheng et al, 2013a;Chu et al, 2012;Matyjaszewski, 2012;Tasdelen et al, 2011). Among different RDRP approaches, single-electron-transfer living radical polymerisation (SET-LRP) is considered as proceeding via the outer-sphere single-electron-transfer (SET) mechanism, which is activated by a simple Cu(0) catalyst instead of Cu(I)X in ATRP (Percec et al, 2006); however, there remains a question between mechanisms of SET-LRP and supplemental activator and the reducing agent atom transfer radical polymerisation (SARA ATRP).…”