Ethylene glycole dimethacrylate EGDMA

Ethylene glycol dimethacrylate EGDMA Elydrophobicity Wettability... 

Copolymeriziation of polystyrene-bound dicyanoketene acetal (DCKA) and ethylene glycol dimethacrylate (EGDMA) yielded a polymer (41) with high n -acidity. It was found to be an effective and completely recyclable catalyst in the high yielding carbon-carbon bond-forming reaction of dimethylacetals with silylated nucleophiles (Scheme 4.26) [118]. 

The previous concepts may be illustrated with the experimental determination of the evolution of reaction rate, measured by DSC at T = 60°C, for the copolymerization of methyl methacrylate (MMA) with variable amounts of ethylene glycol dimethacrylate (EGDMA), a vinyl-divinyl system (Sun et al., 1997). The reaction was initiated with 2,5-dimethyl-2,5-bis(2-ethylhexanoyl)peroxy hexane. 

Mosbach and co-workers developed a method to prepare molecularly imprinted polymers by precipitation polymerization [24]. They started from a dilute, homogenous solution of the monomer methacrylic acid (MAA) and the crosslinker trimethylolpropane trimethacrylate (TRIM) or ethylene glycol dimethacrylate (EGDMA). The polymer formed in the presence of the template molecule 17/1-estradiol, theophylline, or caffeine contained a high proportion of discrete spheres of diameter less than a micron. Because the effect of coalescence becomes predominant with higher solid content of the reaction mixture, this approach is limited to solid contents of typically <2 wt%. 

Fig. 24 Experimental results for the weight-average molecular weight development during the emulsion crosslinking copolymerization of styrene (St)/divinylbenzene (DVB) and methyl methacrylate (MMA)/ethylene glycol dimethacrylate (EGDMA). Data from [323]...

Figure 1.26. A schematic diagram for the formation of a crosslinked network by the polymerization of a monofunctional monomer, e.g. methyl methacrylate (MMA), in the presence of a difimctional crosslinker, such as ethylene glycol dimethacrylate (EGDMA). Gelation occurs at low conversion (pc 12%-20%). Adapted from Pascualt et al. (2002).

Fig. 11 Influence of the proportion of crosslinker on the recognition specificity of MIPs. The crosslinkers represented are ethylene glycol dimethacrylate (EGDMA), tetramethylene dimethacrylate (TMDMA) and divinyl benzene (DVB) (adapted from [94])...

Problem 7.17 Bulk polymerization of methyl methacrylate (MMA) at 60°C with 0.9 g/L of benzoyl peroxide yielded a polymer with a weight average degree of polymerization of 8600 at low conversions. Predict the conversions of MMA at which gelation would be observed if it is copolymerized with 0.05 mol% of ethylene glycol dimethacrylate (EGDMA) at the same temperature and initiator concentration as in the homopolymerization case. 

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