Synthesis of Block Copoly(styrene-b-p-nitrophenyl methacrylate) and Its Derivatives by Atom Transfer Radical Polymerization

Abstract

The preparation of block poly(styrene-b-p-nitrophenyl methacrylate) (PSt-b-PNPMA) and its hydrolysis and amino substitution products, poly(styrene-b-methacrylic acid) (PSt-b-PMAA) and poly(styrene-b−N-butyl methacrylamide) (PSt-b-PBMAD), were described. Polystyrene macroinitiator (PSt-Br) with narrow molecular weight distribution (MWD; M w/M n = 1.18, M n = 14 730) was prepared by ATRP using ethyl 2-bromobutyrate (EBB) as initiator and CuBr/2,2‘-bipyridine(bpy) as catalyst. Then, (PSt-b-PNPMA)s were synthesized by ATRP of NPMA using PSt-Br as initiator and CuBr/bpy as catalyst. GPC and NMR studies showed that the plot of ln([NPMA]0/[NPMA]) against polymerization time was linear, molecular weight (M n) increased linearly with conversion, and the molecular weight distributions were narrow (1.26−1.38) and became narrower as M n increased. PSt-b-PNPMA formed micelles in chloroform with PSt as shell and PNPMA as core but formed inverse micelles in dimethyl sulfoxide. PSt-b-PMAA and PSt-b-PBMAD were characterized by FTIR and NMR, but MWDs of PNPMA prepared by atom transfer radical polymerization were broad (M w/M n = 1.57−2.45). The difference between the copolymerization and homopolymerization of NPMA was discussed.

Grafting of antibacterial polymers on stainless steel via surface‐initiated atom transfer radical polymerization for inhibiting biocorrosion by Desulfovibrio desulfuricans

“…3d), indicating that the extended ATRP time has resulted in a small degree (about 9%) of quaternaization of the longer P(DMAEMA) chains by the dormant alkyl halide groups at the chain ends from the ATRP process (Liu et al, 1999;Wang and Matyjaszewski, 1995). The self-quaternization effect is further confirmed by the appearance of an anionic chloride species (Cl À , with a Cl 2p 3/2 BE at about 197 eV (Hu et al, 2005)) in the Cl 2p core-level spectrum (inset of Fig.…”

“…The deviation in peak component area ratio in the curve-fitted C 1s core-level spectrum of Figure 3c from that of Figure 3a is consistent with the partial quaternization of the P(DMAEAM) chains. The surface-initiated ATRP is strongly dependant on the reaction time, and the thickness of the grafted polymeric brushes increases linearly with the polymerization time (Liu et al, 1999). Thus, the SS-g-P(DMAEMA) 2 surface with a thicker polymer layer is used in the subsequent N-alkylation reaction to produce the antimicrobial surface.…”

Synthesis of Functional Polymers by Post‐Polymerization Modification

“…[11] Smith et al observed that the extent of grafting of an RGD peptide onto polyNAS decreased with increasing pH value and temperature owing to promotion of hydrolysis. [11] Cline and Hanna have noted that the reactivity of various amines towards aminolysis of p-nitrobenzoyl-Nhydroxysuccinimide in anhydrous dioxane correlated strongly with the basicity of the amino group, though steric hindrance within the investigated set of amines caused certain deviations [11,16] diNAS [8] NAS [18] NMAS [9,15,19] NAS [20] NSVB [20] NAS [4,13] NMAS [21,22] NSVB [23] NNHS [24] PFA [6] PFMA [6] PFVB [25] PFMA [26] NPF [7] NPA [27] NPMA [28] NPA [29] NPMA [30] MAPTT [10] 3 MA [17] MA [31] MA [32] MVI [17,33] VI [33] TMI [34] VDM [35,36] VDM [37] VDM [38] VPDMO [38] IDMO [38] GMA [39] GMA [40] 4-ES [41] GMA [42] GA [43] GMA …”

Pyrrolidin-2-one Structure Derivatives as Novel Ligands for Copper-based Atom Transfer Radical Polymerization (ATRP)

“…4,5 As one of the most versatile techniques to synthesize well-defined polymers with narrow molecular weight distributions, 6 ATRP has been utilized successfully to prepare block, [7][8][9] graft, 10-12 comb, 13 star, 14 hyperbranched copolymers, 15 inorganic/organic hybrids (co)polymers 16 and liquid-crystalline polymers 17 in the past decades. Considerable research has been conducted in order to develop these welldefined polymers for wide applications from the coatings industry 18 to the drug delivery 19 and biotechnology.…”