Synthesis of a cellulose supported chain transfer agent and its application to RAFT polymerization

Abstract

A new route for the homogeneous synthesis of cellulose‐based RAFT agents is proposed. The resulting cellulose‐supported RAFT agent is used to mediate the polymerization of N‐isopropyl acrylamide (NIPAAm), and yields cellulose‐graft‐Poly(NIPAAm).

Graft modification of cellulose: Methods, properties and applications

“…The disadvantage of such CTAs is the tedious synthetic process. Perrier et al [170,171,173,187] ever synthesized two CTAs with phenyl or methanethiol group, and they offered good control over the living polymerization of St, MA, DMA and MMA polymerization, by comparison to more classic RAFT agents such as cumyl Scheme 5. Representative CTAs in RAFT of cellulose.…”

Graft copolymers of hydroxyethyl cellulose by a ‘grafting to’ method:15N labelling as a powerful characterisation tool in ‘click’ polymer chemistry

“…Hansson et al 27 used ATRP to prepare cellulose-g-PMMA by grafting from a macroinitiator immobilised on a solid cellulose substrate. Semsarilar et al 28 were the first to report the use of RAFT in combination with a cellulosic material; a hydroxypropyl cellulose (HPC) macro-CTA was used in the RAFT polymerisation of Nisopropylacrylamide (NIPAAM) and ethyl acrylate. Compared to the "grafting from" approach, however, "grafting to" has the significant advantage that it allows the full characterisation of both the grafts and the cellulose backbone prior to the coupling reaction.…”

Living Radical Polymerization by the RAFT Process – A Third Update

“…[166] [420] NIPAm-b-DMAm [420] Thiol-ene Cellulose 156 EA [629] NIPAm [629] DCC/DMAP PLA Poly(MMA-co-TMSEMA) 136 NIPAm [630] Alkyne-azide 'click' C Poly(TMSEMA) 226 VAc [631] DCC/DMAP C Loprodyne (hydroxylated nylon-6,6 membrane) 121 NIPAm [382] DIC/DMAP Polypropylene 89 AA [632] AA-b-Am [632] UV initiator grafted to surface, used in AA polymerization in presence of 89. Am grafted Divinylbenzene microspheres 11 312 [166] RAFT agent attached by single unit monomer insertion.…”