Polyreaktionen an Pigmentoberflächen. VII. Mitteilung: Reaktionen von Polymeren mit endständigen Chlorsilangruppen an Siliciumdioxidoberflächen

Krenkler, K. P.; Laible, Richard; Hamann, K.

doi:10.1002/apmc.1976.050530109

Cited by 52 publications

(22 citation statements)

References 25 publications

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“…The similar tendency was reported by Donnet et al for the grafting of polystyrene by use of peroxidized carbon black [21] and Hamann et al for the grafting of polystyrene with terminal chlorosilane groups onto silica surface [22]. Table 4 clearly shows that the percentage of grafting increases with an increase in the molecular weight of PPG-NCO.…”

Section: (2)supporting

confidence: 75%

Grafting onto ultrafine ferrite particles: Reaction of isocyanate-capped polypropylene glycol with hydroxyl groups on the surface

Tsubokawa

Maruyama

Sone

et al. 1989

Colloid & Polymer Sci

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Abstract:The grafting of polypropylene glycol (PPG) onto an ultrafine ferrite by the reaction of hydroxyl groups on the surface with isocyanate-capped PPG (PPG-NCO), prepared by the reaction of an equimolecular amount of PPGwith tolylene 2,4-diisocyanate, was investigated. When PPG-NCO (Mn = 2.5 x 103) was heated with the ferrite in bulk, the percentage of grafting onto the ferrite at 120 ~ was increased up to 18.5 %. On the contrary, the grafting by the reaction of PPG with hydroxyl groups on the ferrite at 120 ~ was scarcely observed. The grafted PPG onto the ferrite was removed by hydrolysis with a dilute methanol solution of potassium hydroxide. Therefore, it was considered that PPG was grafted onto the ferrite surface with urethane bond. The grafting of PPG onto the surface was also confirmed by infrared spectra. The reaction of PPG-NCO with the ferrite was accelerated by the addition of a-picoline as a catalyst. PPG-grafted ferrite was found to produce a stable colloidal dispersion in organic solvents. Furthermore, the effect of molecular weight of PPG-NCO on the grafting onto the ferrite was discussed.

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Section: (2)supporting

confidence: 75%

Grafting onto ultrafine ferrite particles: Reaction of isocyanate-capped polypropylene glycol with hydroxyl groups on the surface

Tsubokawa

Maruyama

Sone

et al. 1989

Colloid & Polymer Sci

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“…This is because polymers covalently bound to the surface hinder diffusion of further polymer chains to the substrate surface ( Figure 1a). [1,[4][5][6][7][8] Far higher grafting densities have been achieved if the polymer chains are grown from the surface of the substrate by using surface-initiated polymerization (SIP). This approach is known as the 'grafting from' approach.…”

Section: Introductionmentioning

confidence: 99%

Polymer Brushes by Nitroxide‐Mediated Polymerization

Brinks

Studer

2009

Macromol. Rapid Commun.

122

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This review article describes the preparation of polymer brushes by nitroxide-mediated radical polymerization using either the 'grafting to' or the 'grafting from' approach. The use of TEMPO as a classical initiator is intensively described. More sophisticated nitroxides are also included in the discussion. Brush formation on flat surfaces such as wafers and also on particles is reported. Finally, some applications of polymer brushes are presented.

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“…Another straightforward technique for the attachment of polymers to surfaces is to carry out a polymerization reaction in the presence of a substrate with tethered monomers [13][14][15][16][17][18]. In such polymerization reaction, the surface-attached monomers are incorporated into the growing polymer chains in a "grafting-through" manner, where the polymers are eventually bound to the surface after removal of excess physically adsorbed polymers.…”

Section: Introductionmentioning

confidence: 99%

RAFT “grafting-through” approach to surface-anchored polymers: Electrodeposition of an electroactive methacrylate monomer

et al. 2011

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Abstract. The synthesis of homopolymer and diblock copolymers on surfaces was demonstrated using electrodeposition of a methacrylate-functionalized carbazole dendron and subsequent reversible additionfragmentation chain transfer (RAFT) "grafting-through" polymerization. First, the anodically electroactive carbazole dendron with methacrylate moiety (G1CzMA) was electrodeposited over a conducting surface (i.e. gold or indium tin oxide (ITO)) using cyclic voltammetry (CV). The electrodeposition process formed a crosslinked layer of carbazole units bearing exposed methacrylate moieties. This film was then used as the surface for RAFT polymerization process of methyl methacrylate (MMA), styrene (S), and tert-butyl acrylate (TBA) in the presence of a free RAFT agent and a free radical initiator, resulting in grafted polymer chains. The molecular weights and the polydispersity indices (PDI) of the sacrificial polymers were determined by gel permeation chromatography (GPC). The stages of surface modification were investigated using X-ray photoelectron spectroscopy (XPS), ellipsometry, and atomic force microscopy (AFM) to confirm the surface composition, thickness, and film morphology, respectively. UV-Vis spectroscopy also confirmed the formation of an electro-optically active crosslinked carbazole film with a π-π * absorption band from 450-650 nm. Static water contact angle measurements confirmed the changes in surface energy of the ultrathin films with each modification step. The controlled polymer growth from the conducting polymer-modified surface suggests the viability of combining electrodeposition and grafting-through approach to form functional polymer ultrathin films.

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Polyreaktionen an Pigmentoberflächen. VII. Mitteilung: Reaktionen von Polymeren mit endständigen Chlorsilangruppen an Siliciumdioxidoberflächen

Cited by 52 publications

References 25 publications

Grafting onto ultrafine ferrite particles: Reaction of isocyanate-capped polypropylene glycol with hydroxyl groups on the surface

Grafting onto ultrafine ferrite particles: Reaction of isocyanate-capped polypropylene glycol with hydroxyl groups on the surface

Polymer Brushes by Nitroxide‐Mediated Polymerization

RAFT “grafting-through” approach to surface-anchored polymers: Electrodeposition of an electroactive methacrylate monomer

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