Effect of catalyst on formation of poly(methyl methacrylate) brushes by surface initiated atom transfer radical polymerization

Liu, Hui; Zhou, Wanzhu; Ye, Hongqi; Han, Kai; Hou, Shi-chuan; Zhang, Xinyue

doi:10.1007/s11771-014-2275-y

Cited by 5 publications

(5 citation statements)

References 25 publications

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“…[20][21][22] The structure and composition of the resulting copolymer are studied in detail, and the self-assembly process and morphology transition are also discussed. To enhance the application of the polymeric micelles, the controlled release of coumarin 102 under single and combined stimulation is investigated to some extent.…”

Section: The Loading and Release Of Coumarin 102 For The Self-assemblmentioning

confidence: 99%

Self-assembly and morphology transition of amphipathic spiropyran-based random copolymers to control drug release

Chen

Liu

et al. 2016

Designed Monomers and Polymers

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An amphipathic spiropyran-based random copolymer P(SPMA-co-DMAEMA) was synthesized by atom transfer radical polymerization, and the resulting copolymer was characterized by means of 1 H nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, and gel permeation chromatography. The self-assembly behaviors and morphology transition were systematically investigated under single and combined external environmental stimuli by transmission electron microscopy. With coumarin 102 as the model drug molecule, the selfassembly micelles were used to control drug loading, release, and re-encapsulation to some extent. The characterization results indicated the successful preparation of the spiropyran-based random copolymer P(SPMA-co-DMAEMA). The external stimuli had some influences on the morphology of the self-assembly aggregate, and the 'schizophrenic' behavior was interestingly found in this work. The drug release experiments showed the reversible loading and release process up to a point, which might expand the potential application domain of the amphiphilic spiropyran-based random copolymer in drug delivery.

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Section: The Loading and Release Of Coumarin 102 For The Self-assemblmentioning

confidence: 99%

Self-assembly and morphology transition of amphipathic spiropyran-based random copolymers to control drug release

Chen

Liu

et al. 2016

Designed Monomers and Polymers

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“…First, hydroxyl-terminated poly(methyl methacrylate) (PMMA–OH) monomers with the controlled molecular-chain length and molecular-weight distribution were synthesized by atom transfer radical polymerization (ATRP; please refer to “Synthesis of hydroxyl-terminated poly(methyl methacrylate) (PMMA–OH) with low molecular weight by ATRP” in Supporting Information). ATRP is an effective living radical polymerization method to produce a polymer with a uniform chain length. , Previously it was reported that chain-length controlled PMMA by ATRP was successfully synthesized using a CuBr catalyst and a PMDETA ligand, − which were also utilized to synthesize PMMA–OH monomers in this study. As an initiator for ATRP, 2-hydroxyethyl 2-bromo-2-methylpropanoate (HEBiB), including hydroxy groups, was utilized considering the following synthetic process.…”

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confidence: 99%

Compensation for Orientation Birefringence of PMMA by Blending Bottlebrush Polymers Composed of Well-Controlled Graft Chains

2022

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The birefringence of optical polymers is a great issue in optical devices, inhibiting major applications of polymers to optical lenses and films. In this study, we have synthesized effective bottlebrush polymers with which we could attain almost zero birefringence when mixed with optical poly(methyl methacrylate) (PMMA). In detail, the PMMA bottlebrush polymers (PMMA-BBP) were synthesized by the ring-opening metathesis polymerization (ROMP) of norbornene-terminated PMMA macromonomers prepared via atom transfer radical polymerization (ATRP). Linear PMMA and PMMA-BBP were mixed to fabricate blend-film samples (PMMA/PMMA-BBP), which were uniaxially drawn to introduce molecular orientations. Linear PMMA possessed a negative value for its orientation birefringence, while the value of PMMA/PMMA-BBP increased as the PMMA-BBP content increased, whose orientation birefringence could reach almost zero when the ratio of the linear PMMA to PMMA-BBP became 73:27, regardless of the magnitude of the strain. The results reveal that the orientation birefringence of PMMA can be effectively controlled and removed by blending the appropriate content of PMMA-BBP.

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“…PMDETA (34.7 μL, 0.1631 mmol) was then injected into the Schlenk tube with syringe, and the tube was placed in an oil bath for 24 h at 90°C. [39,40] The polymerization was manually stopped by exposing the reactant to air. The mixture was dissolved in THF and then passed through a column of neutral alumina to remove the residual copper catalyst.…”

Section: Synthesis Of P(spma-co-dmaema) By Atrpmentioning

confidence: 99%

Synthesis of spiropyran-containing random copolymer by atom transfer radical polymerization and its complexation with metal ions

Chen

Liu

Cui

et al. 2015

Designed Monomers and Polymers

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(2015) Synthesis of spiropyran-containing random copolymer by atom transfer radical polymerization and its complexation with metal ions, Designed Monomers and Polymers, 18:6, 574-582, DOI: 10.1080/15685551.2015 An amphiphilic random copolymer containing a monomer 2-(dimethylamino) ethyl methacrylate (DMAEMA) and a light-responsive unit 1′-(2-acryloxyethyl)-3′,3′-dimethyl-6-nitrospiro-(2H-1-benzopyran-2,2′-indoline) (SPMA) was synthesized by atom transfer radical polymerization. The solvatochromic and light responsive behaviors of the resulting P (SPMA-co-DMAEMA) copolymer in solution were investigated by UV-vis absorption spectroscopy. The 'negative' solvatochromism upon the increasing solvents polarity was observed. A strong absorption band was recorded at 589 nm in THF, while the lower values were found at 542 and 520 nm in methanol and water, respectively. Moreover, the random copolymer exhibited a good cycling performance by the alternating illumination with ultraviolet (UV) and visible (Vis) lights. Finally, we studied the complexation of zwitterionic merocyanine (MC) with divalent metal ions, and an obvious shift of the location for the maximum absorption peak was found upon addition of Co 2+ or Mn 2+ . A slight color change of the copolymer solution from blue to purple after complexation with Co 2+ or Mn 2+ was also observed and this phenomenon might provide a potential visual observation for the complexation of P(SPMA-co-DMAEMA) with different metal ions.

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Effect of catalyst on formation of poly(methyl methacrylate) brushes by surface initiated atom transfer radical polymerization

Cited by 5 publications

References 25 publications

Self-assembly and morphology transition of amphipathic spiropyran-based random copolymers to control drug release

Self-assembly and morphology transition of amphipathic spiropyran-based random copolymers to control drug release

Compensation for Orientation Birefringence of PMMA by Blending Bottlebrush Polymers Composed of Well-Controlled Graft Chains

Synthesis of spiropyran-containing random copolymer by atom transfer radical polymerization and its complexation with metal ions

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