A facile and efficient strategy for the functionalization of multiple-walled carbon nanotubes using well-defined polypropylene-grafted polystyrene

Abbasian, Mojtaba; Ghaeminia, Haleh; Jaymand, Mehdi

doi:10.1007/s00339-018-1943-4

Cited by 18 publications

(14 citation statements)

References 37 publications

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Section: Resultsmentioning

confidence: 99%

“…A living nature and control over molecular weight are the most important features of ATRP technique that allows the synthesis of polymeric materials with narrow molecular weight distribution as evidenced by a dispersity approaching 1. 19 The molecular weight distribution of the synthesized PSt is investigated using GPC analysis as shown in , and γ(C-H) in the aromatic ring at 823 and 756 cm −1 . As seen, the most important change in the FTIR spectrum of the PSt-Br is the appearance of a weak absorption band at 546 cm −1 , which is related to the stretching vibration of the C-Br group.…”

Section: Characterization Of Pst-nhmentioning

confidence: 99%

“…[16][17][18] The most important advantage of RDRP approaches over ionic polymerizations is their tolerance to functional groups and impurities. This polymerization strategy is divided into three main category known as atom transfer radical polymerization (ATRP), 19,20 nitroxide-mediated polymerization (NMP), 21,22 and reversible addition-fragmentation chains transfer (RAFT) polymerization. 23,24 Among the three, ATRP is developed as an efficient and versatile approach for the synthesis of polymeric materials with excellent control over the molecular weight because of its controlled chain growth and "living" feature.…”

Section: Introductionmentioning

confidence: 99%

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Polystyrene‐modified novolac epoxy resin/clay nanocomposite: Synthesis, and characterization

Massoumi

Abbasian

Mohammad‐Rezaei

et al. 2019

Polymers for Advanced Techs

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A polystyrene‐modified epoxidized novolac resin/montmorillonite nanocomposite was fabricated and characterized successfully. For this purpose, novolac resin (NR) was epoxidized through the reaction of phenolic hydroxyl group with epichlorohydrin in super basic medium to produce epoxidized novolac resin (ENR). Afterward, a polystyrene was synthesized by atom transfer radical polymerization (ATRP) technique, and then brominated at the benzylic positions using N‐bromosuccinimide (NBS). The brominated polystyrene (PSt‐Br) was reacted with ethanolamine in basic medium in order to afford an amine‐functionalized polystyrene (PSt‐NH2). An organo‐modified montmorillonite (O‐MMT) was synthesized through the treatment of MMT with hexadecyl trimethyl ammonium chloride salt. Finally, ENR‐PSt/MMT nanocomposite was fabricated through curing a mixture of ENR (70 wt.%) and O‐MMT (5 wt.%) with PSt‐NH2 (25 wt.%). Transition electron microscopy (TEM) and powder X‐ray diffraction (XRD) analysis revealed that the fabricated nanocomposite has an exfoliated structure. Thermal property studies using thermogravimetric analysis (TGA) showed that the curing of ENR by PSt‐NH2, as well as incorporation of a small amount of MMT have synergistic effect on the thermal stability of the ENR resin.

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Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Pst-nhmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polystyrene‐modified novolac epoxy resin/clay nanocomposite: Synthesis, and characterization

Massoumi

Abbasian

Mohammad‐Rezaei

et al. 2019

Polymers for Advanced Techs

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“…Living free radical polymerization has been introduced for the synthesis of macromolecules with predetermined molecular weights and narrow dispersity. Great progress has been made in controlled/living free radical polymerization in the past few decades toward the synthesis of complex and well-de ned macromolecular architectures [28][29][30][31][32][33][34][35][36][37][38]. However, until now, these techniques have seldom been used in the synthesis of PSt-b-PAA by RAFT polymerization method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of poly(styrene-block-acrylic acid)/Fe3O4 magnetic nanocomposite using reversible addition−fragmentation chain transfer polymerization

et al. 2019

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A well-de ned amphiphilic poly(styrene-block-acrylic acid) (PSt-b-PAA) block copolymer to prepare a magnetic nanocomposite was synthesized by reversible additionfragmentation chain transfer (RAFT) polymerization. The synthesized PSt and PSt-b-PAA copolymer was characterized using FTIR and 1 H NMR spectroscopies as well as GPC analysis. Afterwards, a PSt-b-PAA/Fe 3 O 4 magnetic nanocomposite was fabricated through the incorporation of Fe3O4 nanoparticles (NPs) into the synthesized block copolymer. The morphology of the fabricated magnetic nanocomposite was observed using SEM and TEM. The SEM image revealed that the PSt-b-PAA/Fe3O4 magnetic nanocomposite had spherical morphology with the mean diameter of 100 nm, approximately. In addition, thermal properties of the synthesized polymers as well as the magnetic nanocomposite were studied using DSC and TGA analyses. The developed nanocomposite may be applied for enzyme immobilization and cell separation.

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“…[17][18][19][20] Among the various methods for the synthesis of polymeric micelles, "living" radical polymerization is important. This method is separated into three main class, namely, atom transfer radical polymerization (ATRP), 21,22 reversible additionfragmentation chain transfer (RAFT) polymerization, 13,23 and nitroxide-mediated polymerization (NMP). 24,25 Mentioned methods have been established as useful methods to prepare polymeric materials with complex macromolecular and well-defined structural.…”

mentioning

confidence: 99%

Fabrication and characterization of gold nanospheres‐cored pH‐sensitive thiol‐ended triblock copolymer: A smart drug delivery system for cancer therapy

Mahmoodzadeh

Hosseinzadeh

Jannat

et al. 2019

Polymers for Advanced Techs

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Conventional chemotherapy suffers lack of multidrug resistance (MDR), lack of bioavailability, and selectivity. Nano‐sized drug delivery systems (DDS) are developing aimed to solve several limitations of conventional DDS. These systems have been offered for targeting tumor tissue owing to enhanced long circulation time, drug solubility, their retention effect, and improved permeability. As a result, the aim of this project was the design and development of DDS for biomedical applications. For this purpose, gold nanospheres (GNSs) covered by pH‐sensitive thiol‐ended triblock copolymer [poly(methacrylic acid) ‐b‐poly(acrylamide) ‐b‐poly(ε‐caprolactone)‐SH; PMAA‐b‐PAM‐b‐PCL‐SH] for delivery of anticancer drug doxorubicin (DOX). The chemical structures of triblock copolymer were investigated by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR) spectroscopies. 1H NMR spectroscopy and gel permeation chromatography (GPC) were used for calculating the molecular weights of each part in the nanocarrier. The success of coating, GNSs with triblock copolymer was considered by means of dynamic light scattering (DLS), FTIR, ultraviolet‐visible (UV‐Vis), and transmission electron microscopy (TEM) measurement. The pH‐responsive drug release ability, (DOX)‐loading capacity, biocompatibility, and in vitro cytotoxicity effects of the nanocarriers were also studied. As a result, it is expected that the synthesized GNSs@polymer‐DOX considered as a potential application in nanomedicine demand like smart drug delivery, imaging, and chemo‐photothermal therapy.

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A facile and efficient strategy for the functionalization of multiple-walled carbon nanotubes using well-defined polypropylene-grafted polystyrene

Cited by 18 publications

References 37 publications

Polystyrene‐modified novolac epoxy resin/clay nanocomposite: Synthesis, and characterization

Polystyrene‐modified novolac epoxy resin/clay nanocomposite: Synthesis, and characterization

Synthesis and characterization of poly(styrene-block-acrylic acid)/Fe3O4 magnetic nanocomposite using reversible addition−fragmentation chain transfer polymerization

Fabrication and characterization of gold nanospheres‐cored pH‐sensitive thiol‐ended triblock copolymer: A smart drug delivery system for cancer therapy

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