Triethylene-glycol dimethacrylate

The DADC monomer has been copolymerized with small amounts of polyfunctional methacryflc or acryflc monomers. For example, 3% triethylene glycol dimethacrylate was used as a flexibiflzing, cross-linking agent with a percarbonate as initiator (26). CR-39 and diethylene glycol diacrylate containing isopropyl percarbonate were irradiated with a mercury lamp to a 92% conversion and then cured at 150°C (27). By a similar two-step process DADC was copolymerized with methyl methacrylate and tetraethylene glycol dimethacrylate (28). 

Glycol methacrylates (and retention times [RTs]) ethylene glycol dimethacrylate (RT = 13 min), diethyleneglycol dimethacrylate (RT = 18 min), triethylene glycol dimethacrylate (RT = 22 min), and tetraethylene glycol dimethacrylate... 

Compomers contain no water, but rather are mainly formulated from the same components as conventional composite resins. Typically this means macromonomers, such as bis-glycidyl ether dimethacrylate (bisGMA) or its derivatives and/or urethane dimethacrylate, blended with viscosity-reducing diluents, such as triethylene glycol dimethacrylate (TEGDMA). These polymer systems are filled with non-reactive inorganic powders, for example, quartz or a silicate glass [271]. 

The majority of resins are composed of two dimethacrylate monomers, 2,2 -bis [4(2-hydroxy-3-methacryloyloxypropyloxy)phenyl] propane (Bis-GMA) and triethylene glycol dimethacrylate (TEGDMA) [22-28]. Typically, TEGDMA or other methacrylate monomers are added as viscosity modifiers to Bis-GMA to make the solution less viscous and more appropriate for clinical use. These diluents also allow for better distribution of the components during manufacture of these composite systems. Another common monomer used to make dental composites, especially those manufactured in Europe, is urethane dimethacrylate [24,29, 30], Ethoxy bisphenol A dimethacrylate is another modification of the Bis-GMA monomer that can be used to make a more hydrophobic polymer that would better withstand the wet oral environment. Other diluents include low viscosity diacrylates and dimethacrylates. Table 1 lists some of these monomers [31-37]. 

The liquid phase of the dispersions contained, by weight, 99% methyl methacrylate, 0.5% distilled dimethyl-p-toluidine, and 0.5% ultraviolet absorber. Matrices used for volume concentration effects contained 5% ethylene dimethacrylate and 10% methyl methacrylate-ethyl methacrylate copolymer with methyl methacrylate monomer reduced to 84%. Matrices containing 5% additives (described above) contained 15% triethylene glycol dimethacrylate with methyl methacrylate reduced to 79%. 

Table I shows the effect of crosslinker chain length and concentration on mechanical properties. Contrary to expectations, both flexural and impact properties increased slightly with increasing ethylene dimethacrylate (EDMA) content up to 10%. The crosslinker had a relatively slight effect on the stiffness and brittleness of the cured dispersions up to 15 vol %. Triethylene glycol dimethacrylate (TEDMA) behaved similarly but had a less favorable effect on impact strength. The 5 to 10% improvements in all mechanical properties at the 10% EDMA level compared with uncrosslinked dispersion might well offer a substantial improvement in functionality and durability under bioconditions if combined with other dispersion technology (1,2).

Modifiers added at 2 vol % on total volume. All matrices contained 6 vol % triethylene glycol dimethacrylate. 

Benzophenone with tertiary amines has been used to polymerize bis 2-[2-(methacryloyloxy)ethoxy]ethyl phthtilate and triethylene glycol dimethacrylate in bulk, while mixtures of ZnO and l,8-diamino-3,6-diazaoctane have been used to emulsion-polymerize styrene. An internal keto-imine compound,... 

Other studies of interest include the modification of polysulphone membranes using crosslinking agents, thermoelastic properties of network polymers, and the effects of coating thickness on initiator activity for oligourethane acrylates and triethylene glycol dimethacrylate. ... 

Applications. An example of practical approach based on polymer-imprinted materials is the development of biosensors for the detection of the herbicides atrazine [87] and 2,4-dichlorophenoxyacetic acid (2,4-D) [88]. The first one is based on conductimetric detection and it uses an atrazine selective polymeric matrix generated from triethylene glycol dimethacrylate... 

In a similar report utilizing triethylene glycol dimethacrylate, the polymer was described as a linear polyester.330 Again, this description is probably incomplete, though it is possible at high catalyst loadings to prepare methacrylic dimers. Under ideal conditions, this would lead to the linear, unsaturated polymer 97. 

EGDM ethylene glycol dimethacrylate TEGDM triethylene glycol dimethacrylate ... 

Numerous thermal analysis studies have been performed by other groups on resin composites, which are used for small anterior restorations that do not experience substantial stress and with caution for posterior teeth because of concern about wear [1-3]. The polymer matrix contains the oligomer bis-GMA (bisphenol A-glycidyl methacrylate) or urethane dimethacrylate, and triethylene glycol dimethacrylate is a diluent. Filler particles are silane-coated for chemical bonding with tire matrix. Free-radical polymerization is carried out by chemical... 

Studies of the oxygen absorption of triethylene glycol dimethacrylate indicate that the reaction is catalyzed by DMPT and by DMPT with saccharin. This oxygen absorption appears to be continuous, although the active oxygen content of the system appears to level off due to decomposition of the peroxide formed. Oxalic acid substantially inhibits the absorption of oxygen [20]. 

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