A Novel, Facile Method for the Preparation of Uniform, Reactive Maleic Anhydride/Vinyl Acetate Copolymer Micro‐ and Nanospheres

Xing, Chang-Min; Yang, Wantai

doi:10.1002/marc.200400230

Cited by 82 publications

(88 citation statements)

References 31 publications

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“…39,40 In a typical experiment, the monomers MAH (2.45 g, 25 mmol) and St (1.3 g, 12.5 mmol), the initiator azobisisobutyronitrile (AIBN; 37.5 mg, 1 wt % relative to the monomers) and the solvent isopentyl acetate (25 ml) were added to a 100 ml three-necked flask.…”

Section: Experimental Procedures Preparation Of the Pms Templatementioning

confidence: 99%

“…This process is an improvement over our previously developed 'stabilizer-free precipitation polymerization' for core-shell polymer particles and consequent removal of the template core by solvent etching. 39,40 Excess MAH was added into the reaction system at the very beginning of the reaction. After the alternating copolymerization of MAH and styrene (St), residual MAH monomer is present along with the monodisperse poly(MAH-alt-St) (PMS) nanoparticles formed in the reaction system.…”

Section: Introductionmentioning

confidence: 99%

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Super-adsorbent material based on functional polymer particles with a multilevel porous structure

et al. 2016

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Porous polymer particles with multilevel structures consisting of submicron-sized hollow cavities and interconnected mesopores within the crosslinked shell were designed and prepared. An extremely high density of anhydride groups in the crosslinked shell can be conveniently converted into versatile functional groups for the adsorption of hazardous pollutants. As a proof of concept, we utilized carboxylate-functionalized hollow particles as a selective adsorbent for the removal of the basic dye methylene blue and found that these particles exhibited a very high adsorption capacity (1603 mg g − 1 ). Furthermore, the hollow structure, highly interconnected mesopores and rigid shell of the particles not only endow the adsorbent with fast adsorption/desorption rates but also facilitate their facile separation and easy regeneration. We believe that these porous polymer particles have great potential for applications in many fields, including as adsorbents, catalyst supports and matrices for the binding of sensitive materials.

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Section: Experimental Procedures Preparation Of the Pms Templatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Super-adsorbent material based on functional polymer particles with a multilevel porous structure

et al. 2016

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“…[9,12,15] This may be attributed to the facile alternating copolymerization of MAn and VAc by a charge transfer complex (CTC) mechanism, as has been discussed in detail in our previous articles. [19,20] However, we found that the ultimate conversion of monomer was hard to be completed (around 80-90%). This can be interpreted from the phenomenon of phase separation in the dispersion polymerization process, which may lead to the ratio imbalance of MAn and VAc (i.e., beyond 1:1).…”

Section: Typical Kinetic Charactermentioning

confidence: 92%

“…[19,20] In comparison, the solution copolymerization of MAn and VAc in methyl propyl ketone was also conducted (with the standard recipe in Table 1, except that the solvent was replaced).…”

Section: Polymerization Proceduresmentioning

confidence: 99%

“…[12][13][14][15][16][17][18] Recently, we have reported a novel dispersion copolymerization of maleic anhydride (MAn) and vinyl acetate (VAc), which readily yields monodisperse copolymer microspheres in the absence of stabilizer. [19,20] The effects of some principal factors on the morphology of polymer microspheres have been described. This paper will mainly focus on the polymerization features of the unique stabilizer-free dispersion copolymerization of MAn and VAc.…”

Section: Introductionmentioning

confidence: 99%

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Stabilizer‐Free Dispersion Copolymerization of Maleic Anhydride and Vinyl Acetate. II. Polymerization Features

Xing

Yang

2006

Macro Chemistry & Physics

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Summary: The polymerization features of the novel stabilizer‐free dispersion copolymerization of MAn and VAc were studied. It was found that the dispersion copolymerization of MAn/VAc is a fairly rapid process, which starts from a slow solution polymerization (below 10% conversion, Stage I) and follows a drastic increase of polymerization rate (10–80% conversion, Stage II) due to the known gel effect. Such process was accompanied by the increase of molecular weight of the copolymer formed ($\overline M _{\rm n}$ from 1.2 × 104 to 3.8 × 104 g · mol−1) and the broadening of the molecular weight distribution ($\overline M _{\rm w} /\overline M _{\rm n}$ from 2.4 to 8.0). Ea of Stage I was determined to be 76.7 kJ · mol−1, while the value of Stage II was 64.7 kJ · mol−1. The lower Ea in Stage II than that in Stage I suggests that there exists a shift of polymerization locus from the solution phase to the particle phase. Moreover, we found that the initial rate of polymerization increased with monomer concentration as well as initiator concentration, following the relationship (Rp)i ∝ [MAn + VAc] · [BPO]. This further implies that the dispersion copolymerization mainly proceeds as a solution polymerization in the very early stage.Evolutions of the stabilizer‐free dispersion copolymerization of MAn and VAc with butyl acetate as reaction medium and the solution copolymerization with methyl propyl ketone as solvent.magnified imageEvolutions of the stabilizer‐free dispersion copolymerization of MAn and VAc with butyl acetate as reaction medium and the solution copolymerization with methyl propyl ketone as solvent.

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Clusterization‐Triggered Emission

Zhang

Tang

2022

Handbook of Aggregation‐Induced Emission

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A Novel, Facile Method for the Preparation of Uniform, Reactive Maleic Anhydride/Vinyl Acetate Copolymer Micro‐ and Nanospheres

Cited by 82 publications

References 31 publications

Super-adsorbent material based on functional polymer particles with a multilevel porous structure

Super-adsorbent material based on functional polymer particles with a multilevel porous structure

Stabilizer‐Free Dispersion Copolymerization of Maleic Anhydride and Vinyl Acetate. II. Polymerization Features

Clusterization‐Triggered Emission

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