Synthesis and surface properties of PDMS-containing latexes by emulsion polymerization using AIBN as the initiator

Zhang, Quanyuan; Galván-Miyoshi, J.M.; Pezzotti, Fabio; Ming, Weihua

doi:10.1016/j.eurpolymj.2013.05.018

Cited by 13 publications

(11 citation statements)

References 20 publications

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“…The polydispersity index (PDI) related to vesicle diameter ranges from 0.2 to 0.4, indicating a reasonably, but consistent broad distribution of particle sizes, with no clear connections with the oil content in the monomer mixture. Despite its polydisperse nature, the emulsions have shown good stability, as previously mentioned in the text, and as observed in similar systems [20].…”

Section: Discussionmentioning

confidence: 49%

“…In order to verify that tung oil/asolectin-based emulsions can be polymerized under free radical conditions in the presence of DTBP, 1:4 (xylene:water) by weight emulsions of various ratios of tung oil and asolectin were cured in a convection oven at 100 • C for 24 h. The 1:4 (xylene:water) by weight solvent ratio was determined based on related literature [20] and after a major screening of solvent combinations. As described previously, the polymerized emulsions were dried in a vacuum oven at 60 • C for 24 h and the dried materials recovered were subjected to Maldi-TOF analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Typically, emulsifiers are required in order to achieve successful free radical emulsion polymerization in solvent mixtures containing water [20]. In this work, asolectin is used for the first time as an effective bio-based emulsifier for the emulsion free radical co-polymerization of tung oil, divinylbenzene, and n-butyl methacrylate in a xylene/water mixture.…”

Section: Methodsmentioning

confidence: 99%

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Emulsion Polymerization of Tung Oil-Based Latexes with Asolectin as a Biorenewable Surfactant

et al. 2016

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Bio-based vesicles, with potential application in drug delivery and/or catalyst encapsulation, have been prepared by the free radical emulsion co-polymerization of tung oil, divinylbenzene (DVB), n-butyl methacrylate (BMA), and asolectin in a xylene/water mixture. The free radical polymerization was initiated by di-tert-butyl peroxide (DTBP) at 100 • C in a convection oven. Molecular weights of approximately 11,000 Da were measured by Matrix-assisted Laser Desorption/Ionization-Time of Flight (Maldi-TOF) for tung oil-asolectin copolymers, verifying that significant polymerization occurs under the cure conditions employed. The cure of the co-monomer mixture employed in this work was monitored by Dielectric Analysis (DEA), while changes in the Raman spectrum of all co-monomers before and after the cure, along with differential scanning calorimetry (DSC) analysis, have been used to verify the need of a post-cure step and completion of the polymerization reaction. Scanning Transmission Electron Microscopy (STEM) images of the emulsion after polymerization indicate that vesicles were formed, and vesicle size distribution of samples prepared with different amounts of tung oil were determined using a Zetasizer.

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Section: Discussionmentioning

confidence: 49%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Emulsion Polymerization of Tung Oil-Based Latexes with Asolectin as a Biorenewable Surfactant

et al. 2016

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“…The obtained fluorescence intensity spectra suggest that polymerization starts at the droplet–water interface, pointing to a mechanism where radicals enter the droplets rather than originating there. Finally, poly(butyl methacrylate) was grafted on ultrahydrophobic poly(dimethylsiloxane) macromonomers in miniemulsion polymerization . These macromonomers acted both as grafting agent and costabilizer (or hydrophobe).…”

Section: Early Workmentioning

confidence: 99%

On the miniemulsion polymerization of very hydrophobic monomers initiated by a completely water‐insoluble initiator: thermodynamics, kinetics, and mechanism

Jansen

Meuldijk

Lovell

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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Successful miniemulsion polymerizations of very hydrophobic monomers, such as lauryl methacrylate and 4-tertbutyl styrene, initiated by very hydrophobic (i.e., completely water-insoluble) lauroyl peroxide, are reported. Conversion-time histories, as well as final latex properties, for example, the particle size distribution, are different from similar miniemulsion polymerizations in the presence of water-soluble initiators. The observed differences can be attributed to the average number of radicals inside a miniemulsion particle; the system obeys Smith-Ewart case I rather than Case II kinetics. Albeit the pairwise generation of radicals in the monomer droplets, substantial polymerization rates are observed. Water, present in the droplet interfacial layer, is supposed to act as chain transfer agent. The product of a chain transfer event is a hydroxyl radical, exit of this hydroxyl radical allows for the presence of single radicals in particles. The proposed mechanisms allow for agreement between initial droplet and final particle size distributions in miniemulsion polymerization initiated by lauroyl peroxide.

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“…In this case, introducing polysiloxane into epoxy matrix to obtain polysiloxane/epoxy hybrids is an effective approach in tailoring surface properties of epoxy-based coatings [1]. Therefore, the polysiloxane of cage-structured polysiloxanes of polyhedral oligomeric silsesquioxanes (POSS) and linear-structured polysiloxane of polydimethylsiloxane (PDMS) are involved into epoxy matix for organic-inorganic hybrids used as promising materials for surface coating [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Cage and linear structured polysiloxane/epoxy hybrids for coatings: Surface property and film permeability

Jia

et al. 2017

Journal of Colloid and Interface Science

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Synthesis and surface properties of PDMS-containing latexes by emulsion polymerization using AIBN as the initiator

Cited by 13 publications

References 20 publications

Emulsion Polymerization of Tung Oil-Based Latexes with Asolectin as a Biorenewable Surfactant

Emulsion Polymerization of Tung Oil-Based Latexes with Asolectin as a Biorenewable Surfactant

On the miniemulsion polymerization of very hydrophobic monomers initiated by a completely water‐insoluble initiator: thermodynamics, kinetics, and mechanism

Cage and linear structured polysiloxane/epoxy hybrids for coatings: Surface property and film permeability

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