The development of controlled/“living” polymerization greatly stimulated the prosperity fabrication and application block copolymer nano-objects.

Mixed-arm star polymers were synthesized by atom transfer radical polymerization (ATRP) and reverse addition−fragmentation chain (RAFT) sequential using the "core first" method. The synthesis consisted of three steps: (i) a hyperbranched polyglycerol (HPG) core, (ii) ATRP with first monomer (St, styrene), (iii) then second (tert-butyl acrylate, tBA) from core RAFT technique. After hydrolysis poly(tBA), poly(acrylic acid) (PAA) arms obtained. In whole process, final products intermediates...

Abstract Well‐defined ABCD 4‐Miktoarm star‐shaped quarterpolymers of [poly(styrene)‐poly( tert ‐butyl acrylate)‐poly(ethylene oxide)‐poly(isoprene)] [star(PS‐P t BA‐PEO‐PI)] were successfully synthesized by the combination “click” chemistry and multiple polymerization mechanism. First, poly(styryl)lithium (PS − Li + ) poly(isoprene)lithium (PI capped ethoxyethyl glycidyl ether (EEGE) to form PS PI with both an active ω‐hydroxyl group ω′‐ethoxyethyl‐protected hydroxyl group, respectively....

Multicyclic polystyrene (PS) with hyperbranched structure was constructed in an efficient way. First, a seesaw-type PS synthesized via atom transfer radical polymerization (ATRP) using Y-shaped ATRP initiator containing one hydroxyl at center and bromine each end. After azidation, the anthryl groups were introduced to ends of polymer chain by click reaction trifunctional molecule bearing alkynyl, hydroxyl, (alkynyl-OH-ant). By irradiation 365 nm UV light highly dilute condition, cyclic three...

Abstract Heterograft copolymers poly(4‐glycidyloxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl‐ co ‐ ethylene oxide)‐ graft ‐polystyrene and poly( tert ‐butyl acrylate) (poly (GTEMPO‐ ‐EO)‐ g ‐PS/P t BA) were synthesized in one‐pot by atom transfer nitroxide radical coupling (ATNRC) reaction via “graft onto.” The main chain was prepared the anionic ring‐opening copolymerization of oxide (EO) 4‐glycidyloxy‐2,2,6,6‐tetramethylpiperidine‐1‐oxyl (GTEMPO) first, then polystyrene poly ( with bromine end...

Amphiphilic block copolymers consisting of hydrophilic, poly(acrylic acid) randomly decorated with acrylate groups and hydrophobic, rubbery poly(n-butyl acrylate) self-assembled into well-defined micelles an average diameter ∼21 nm. Radical polymerization acrylamide in the presence crosslinkable gave rise to hybrid, elastomeric hydrogels whose mechanical properties can be readily tuned by varying BCM concentration.

Abstract A novel method for preparation the comb‐like copolymers with amphihilic poly(ethylene oxide)‐block‐poly(styrene) (PEO‐ b ‐PS) graft chains by “graft from” and onto” strategies were reported. The ring‐opening copolymerization of ethylene oxide (EO) ethoxyethyl glycidyl ether (EEGE) was carried out first using α‐methoxyl‐ω‐hydroxyl‐poly(ethylene oxide) ( m PEO) diphenylmethyl potassium (DPMK) as coinitiation system, then EEGE units on resulting linear copolymer PEO‐ ‐Poly(EO‐ co...

A partial ligand exchange route to the preparation of transparent polymer nanocomposites with a high nanoparticle loading in bulk size for gamma-ray detection.

Abstract A novel method for synthesis of amphiphilic macrocyclic graft copolymers with multi‐polystyrene lateral chains is suggested, by combination anionic ring‐open polymerization (AROP) atom transfer radical (ATRP). The ring‐opening copolymerization ethylene oxide (EO) and ethoxyethyl glycidyl ether (EEGE) was carried out first using triethylene glycol diphenylmethylpotassium (DPMK) as coinitiators; the monomer reactivity ratio them are r 1(EO) = 1.20 ± 0.01 2(EEGE) 0.76 0.02...

Abstract The star block copolymers with polystyrene‐ ‐poly(ethylene oxide) (PS‐ b ‐PEO) as side chains and hyperbranched polyglycerol (HPG) core were synthesized by combination of atom transfer radical polymerization (ATRP) the “atom nitroxide coupling” (“ATNRC”) reaction. multiarm PS bromide end groups originated from HPG (HPG‐ g ‐(PS‐Br) n ) was ATRP first, heterofunctional PEO α‐2,2,6,6‐tetramethylpiperidinyl‐1‐oxy group ω‐hydroxyl (TEMPO‐PEO) prepared anionic separately using...

A facile approach for synthesizing bicyclic and tetracyclic polymers.

ABSTRACT Well‐defined star‐shaped hydrophobic poly(ε‐caprolactone) (PCL) and hydrophilic poly(ethylene glycol) (PEG) amphiphilic conetworks (APCNs) have been synthesized via the combination of ring opening polymerization (ROP) click chemistry. Alkyne‐terminated six arm PCL (6‐s‐PCL x ‐CCH) azido‐terminated PEG (N 3 ‐PEG‐N ) are characterized by 1 H NMR FT‐IR. The swelling degree APCNs is determined both in water organic solvent. This unique property dependent on nanophase separation phases....

In this study, a bead-like multicyclic polymer was synthesized by the UV-induced coupling reaction of an anthracene-telechelic monocyclic precursor and reversible topological transformation between realized.

Abstract The star graft copolymers composed of hyperbranched polyglycerol (HPG) as core and well defined asymmetric mixed “V‐shaped” identical polystyrene (PS) poly( tert ‐butyl acrylate) side chains were synthesized via the “click” chemistry. V‐shaped chain bearing a “clickable” alkyne group at conjunction point two blocks was first prepared through combination anionic polymerization styrene (St) atom transfer radical acrylate ( t BA) monomer, then chemistry conducted between groups on...

Abstract Well‐defined triblock copolymer poly(ethylene oxide)‐ b ‐poly(2‐(diethylamino)ethyl methacrylate)‐ ‐poly( N ‐isopropyl‐acrylamide) (PEO‐ ‐PDMAEMA‐ ‐PNIPAAm) was synthesized via sequential reversible addition‐fragmentation chain transfer polymerization (RAFT) of 2‐(dimethylamino)ethyl methacrylate (DMAEMA) and ‐isopropylacrylamide (NIPAAm) using α‐methoxy‐ω‐S‐1‐dodecyl‐S‐α‐(α,α′‐dimethyl‐α″‐acetate) oxide) (mPEO‐DDAT) as macro‐RAFT agent, AIBN initiator in dioxane at 80°C. The data...

Abstract Atom transfer radical polymerization (ATRP) was applied to synthesize a new kind of star polymers hyperbranched polyglycerol (HPG) core with multiarms PS‐ b ‐PtBA and ‐PAA by using the “core first” technique. The HPG obtained anionic glycerol first, then pendant hydroxyl groups were esterified 2‐bromoisobutyryl bromide yield HPG‐ g ‐Br, which used as macroinitiator for ATRP first monomer (St) second (tBA). After hydrolysis PtBA block, poly(acrylic acid) (PAA) side chains formed....

Abstract The copolymer of polystyrene‐ block ‐poly(ethylene oxide)‐ ‐poly ( tert ‐butyl acrylate) (PS‐ b ‐PEO‐ ‐P t BA) was prepared, the synthesis process involved ring‐opening polymerization (ROP), nitroxide‐mediated (NMP), and atom transfer radical (ATRP), 4‐hydroxyl‐2,2,6,6‐tetramethylpiperidinyl‐1‐oxy (HTEMPO) used as parent compound. PEO precursors with α‐hydroxyl‐ω‐2,2,6,6‐tetramethylpiperidinyl‐1‐oxy end groups(TEMPO‐PEO‐OH) were first obtained by ROP EO using HTEMPO...

Heterografted amphiphilic cyclic homopolymers were prepared by the self-folding cyclization technique. The reversible addition–fragmentation chain transfer (RAFT) polymerization of N,N′-disubstituted acrylamide with oligo(ethylene glycol) (OEG) and octyl groups (OEGOAM) was performed to afford linear POEGOAM two terminal anthryl groups. After in water, single-chain polymeric nanoparticles (SCPNs) produced from precursors via hydrophobic interaction. By irradiating aqueous solution SCPNs 365...

ABSTRACT We previously explored a series of CO 2 adducts from alkylated polyethylenimines with C 4 to 16 alkyl side chains, serving as climate‐friendly blowing agents for polyurethanes (PUs). Among them, the polyethylenimine 8 (2‐ethylhexyl) chains demonstrated highest foaming efficiency. In this study, we further changed grafting rate alkyl, 7 16%, and investigated effects resulting on process. For both systems containing castor oil‐derived polyol (Polycin T‐400) or poly(propylene glycol)...

A multicyclic polymer with a hyperbranched structure was successfully synthesized.

Abstract A simple and efficient method to construct a hyperbranched multicyclic polymer is introduced. First, tailored trithiocarbonate with two terminal anthracene units three azide groups successfully synthesized, this multifunctional used as chain transfer agent (CTA) afford anthracene‐telechelic polystyrene (PS) via reversible addition‐fragmentation (RAFT) polymerization. After that, linear PS irradiated under 365 nm UV light achieve the cyclization process. The monocyclic further reacts...