Synthesis of poly(methylmethacrylate) macromonomers prepared by radical chain transfer reaction H NMR study of macromonomer end-groups

Loubat, Cédric; Soulier, Sébastien; Boutevin, Bernard

doi:10.1007/s002890170102

Cited by 19 publications

(10 citation statements)

References 1 publication

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“…Assuming quantitative reaction, the average number of double bonds per chain for Dispersant I, Dispersant II, and Dispersant III is 0, 0.5, and 1.0, respectively. As described in the Supplemental Information section, the presence of the double bond in the dispersant after the esterification is confirmed by 1 H NMR, as has been observed in literature . With half of the carboxyl groups functionalized, Dispersant II is similar to the examples found in the patent literature; Dispersant I (non‐functionalized) and Dispersant III (fully‐functionalized) were synthesized to further investigate the role of the functional groups during NAD synthesis.…”

Section: Resultssupporting

confidence: 66%

Investigating the Effectiveness of Reactive Dispersants in Non‐Aqueous Dispersion Polymerization

Yang

Hutchinson

2015

Macro Reaction Engineering

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Non‐aqueous dispersion (NAD) radical polymerization is used to produce poly(acrylic) nanoparticles (<200 nm) at 60 wt% solids content by a starved‐feed semibatch process, with steric stabilization provided by a low molecular weight vinyl‐functionalized polymeric dispersant. The performance of a vinyl‐terminated BMA macromer is compared to that of a butyl methacrylate (BMA) based grafted dispersant with vinyl groups attached at random positions along the backbone. The macromer dispersant is incorporated more effectively than the randomly grafted dispersant, a result attributed to the uniform distribution of reactive double bonds across the entire dispersant molar mass distribution, although the effectiveness of the macromer dispersant decreases when methacrylates are components of the NAD recipe.

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Section: Resultssupporting

confidence: 66%

Investigating the Effectiveness of Reactive Dispersants in Non‐Aqueous Dispersion Polymerization

Yang

Hutchinson

2015

Macro Reaction Engineering

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“… where g ′, d and d ′ are proton integrations at 5.14, 6.14 and 5.61 ppm, respectively (see Supporting information). This result is comparable to the value (20%) reported in the literature 13…”

Section: Resultssupporting

confidence: 90%

“…It was further reacted with GMA to generate a partially methacrylated product. The latter proceeded by two reaction pathways, including both α and β additions between the carboxyl groups of H20‐COOH and the epoxy groups of GMA 13. The ratio of conformation from β addition was 23%, which was calculated according to Equation (1).…”

Section: Resultsmentioning

confidence: 99%

Encapsulation and Controlled Release of a Hydrophobic Drug Using a Novel Nanoparticle‐Forming Hyperbranched Polyester

Zou

Shi

Wang

et al. 2005

Macromolecular Bioscience

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An amphiphilic, hyperbranched polymer suitable for use in controlled drug delivery is reported. This polymer was obtained by modification of the hyperbranched aliphatic polyester Boltorn H20 (H20) with succinic anhydride and then glycidyl methacrylate, and formed nanoparticles in aqueous solution. The critical association concentration was 7.4 x 10(-3) g . L(-1), as determined by fluorescence spectroscopy using pyrene as a molecular probe. A static/dynamic laser light scattering (LLS) study revealed that the average particle size was 39.4 nm with a low particle size distribution (PDI=0.04), and that each particle was composed of about 350 amphiphilic molecules. Daidzein, a hydrophobic traditional Chinese medicine, was encapsulated during particle formation and the release properties were determined. The optimal feeding concentration of daidzein to hyperbranched polyester was 4.9 x 10(-5) g . mL(-1) to 5.0 x 10(-3) g . mL(-1) with a loading efficiency of 76.1%. In the presence of the enzyme Lipase PS, the drug loaded nanoparticles degraded in a random one-by-one manner and released the drug over a few days. This system is therefore a novel controlled drug release system based on nanoparticles formed of hyperbranched polyester. Encapsulation of daidzein by hyperbranched polyester particles.

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“…The latter reaction underwent two routes including both a and b additions between carboxyl groups of H20-COOH and epoxy groups of GMA. [15] The ratio of conformation from b addition was calculated to be 23%, according to the equation…”

Section: Resultsmentioning

confidence: 99%

“…This result is comparable to the value (20%) reported by the literature. [15] LLS Study of H20-AM Aqueous Solution…”

Section: Resultsmentioning

confidence: 99%

Crosslinkable Vesicles Self‐Assembled by Amphiphilic Hyperbranched Polyester

Zou¹,

Ye²,

Shi³

2005

Macromol. Rapid Commun.

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Summary: Amphiphilic hyperbranched polyester (H20‐AM) with methacrylate end groups was synthesized based on hyperbranched aliphatic polyester (Boltorn™ H20). Narrow‐dispersed crosslinkable vesicles were obtained by dissolving H20‐AM in water, and characterized by laser light scattering and TEM. The hollow structural vesicle is composed of around 350 H20‐AM molecules, having a radius of around 40 nm and $\overline M _{\rm w}$ of 1.9 × 106 g · mL−1. The vesicles were fixed by crosslinking of methacrylate groups to form shape‐persistent structures.TEM images of the crosslinked vesicles at lower magnification.magnified imageTEM images of the crosslinked vesicles at lower magnification.

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Synthesis of poly(methylmethacrylate) macromonomers prepared by radical chain transfer reaction H NMR study of macromonomer end-groups

Cited by 19 publications

References 1 publication

Investigating the Effectiveness of Reactive Dispersants in Non‐Aqueous Dispersion Polymerization

Investigating the Effectiveness of Reactive Dispersants in Non‐Aqueous Dispersion Polymerization

Encapsulation and Controlled Release of a Hydrophobic Drug Using a Novel Nanoparticle‐Forming Hyperbranched Polyester

Crosslinkable Vesicles Self‐Assembled by Amphiphilic Hyperbranched Polyester

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