Polymethacrylic acid, oxidation

Poly(3,3 ionene) 80 Polylysine 148 Polymethacrylic acid 54 Polypeptides 147 Polypropylene oxide 158 Polysoaps 63... 

Vink [25] found that Fe+ and Cr ions slightly affected the course of oxidative degradation of (1) hydroxyethylcellulose, (2) methylcellulose (both frequently used as dry press binders), (3) polyoxyethylene, (4) polyvinyl alcohol, and (5) polymethacrylic acid (frequently used as steric stabilizers and binders for aqueous ceramic suspensions). 

Fig. 22 Swollen thickness of a polymethacrylic acid brush attached to a planar lanthanum oxide surface as a function of the pH of the solution. The thickness is determined by FT analysis (closed symbols) and by Fresnel modeling (open symbols) of ellipsometric data. For details see text...

Polyethylene Polyethylene, oxidized Polyglyceryl-10 tetraoleate Polyisobutene Polymethacrylic acid Polymethyl methacrylate Polypropylene Polysorbate 81 Polyvinyl alcohol Polyvinyl butyral... 

An alternative (and perhaps more efficient) polymeric surfactant is the amphipathic graft copolymer consisting of a polymeric backbone B (polystyrene or polymethylmethacrylate) and several A chains ( teeth ) such as polyethylene oxide. The graft copolymer is referred to as a comb stabilizer—the polymer forms a brush at the solid/liquid interface. The copolymer is usually prepared by grafting a macromonomer such as me-thoxy polyethylene oxide methacrylate with polymethyl methacrylate. In most cases, some polymethacrylic acid is incorporated with the polymethylmethacrylate backbone this leads to reduction of the glass transition of the backbone, which makes the chain more flexible for adsorption at the S/L interface. Typical commercially available graft copolymers are Atlox 4913 and Hypermer CG-6 (ICI). 

Kaczmarek and co-workers [38] investigated the course of photo-oxidative degradation of polyacrylic acid, polymethacrylic acid, and polyvinyl pyrrolidone using infrared and ultraviolet spectroscopy. 

Ohnishi and co-workers [39] have carried out an ESR study of the radiation oxidation of polyvinyl chloride (PVC). This technique has also been applied to studies of PE [40], polymethyl methacrylate [41], PVC [42], polymethacrylic acid [43], and polycarbonate [44],... 

Chen Dongyun, Jiang Mengjun, Li Najun, et al. Modification of magnetic silica/iron oxide nanocomposites with fluorescent polymethacrylic acid for cancer targeting and drug delivery. J. Mater. Chem. 20 no 31 (2010) 6422-6429. 

Similarly, the syntheses of polymethacrylate-h-poly(ethylene oxide), poly-methacrylate-fc-poly(methacrylic acid) and polymethacrylate-h-polysiloxane-h-polymethacrylate copolymers were achieved by end group transesterification of polymethacrylates prepared by radical polymerization in the presence of mer-captans [128]. 

Lesho MJ, Sheppard NF (1996) Adhesion of polymer films to oxidized silicon and its effect on performance of a conductometric pH sensor. Sens Actuators B 37 61-66 Licea-Claverie A, Salgado-Rodriguez R, Lugo-Medma E, Amdt K-F (2008) Incorporation of acid polymethacrylates into temperature sensitive hydrogels using electron beam irradiation. Polym Bull 60 701-712... 

Because the thermal stability of polystyrenes and polymethacrylates is limited to 200°C, continuous use of a polymer-supported reactive species tends to be limited to significantly lower temperatures than this (see polymeric sulphonic acids). There is considerable interest in supporting, in particular, alkene oxidation catalysts on polymers and to operate reactions at temperatures above 200°C. To achieve this, novel thermo-oxidatively stable supports are required and some progress has been made in this direction. More details of specific applications will be given later, but supports based on, for example, polyacrylonitrile [50-52], polyamides [53-56], polysulphone [57, 58], polyaniline [59] and polybenzimidazole... 

Percec V, Heck J, Tomazos D, Falkenberg F, Blackwell H, Ungar G (1993) Self-assembly of taper-shaped monoesters of oligo(ethylene oxide) with 3,4,5-tris(p-dodecyloxybenzyloxy) benzoic acid and of their polymethacrylates into tubular supramolecular architectures displaying a columnar mesophase. J Chem Soe Ptakin Trans 1(22) 2799-2811. doi 10.1039/P19930002799... 

Their corresponding polymethacrylates (8) were obtained by free radical polymerization. These taper-shaped monoesters of oligo(ethylene oxide) (EO) with 3,4,5-tris(/ -dodecyloxybenzyloxy)benzoic acid and their corresponding polymers self-assembled into a tubular supramolecular architecture displaying an enantiotropic columnar hexagonal mesophase. This interesting supramolecular architecture is mentioned in the next section. 

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