Macromer, epoxy ether terminated

This work deals with the synthesis of epoxy ether terminated polystyrene macromers and their copol3nnerization with ethylene oxide. The purpose of this work is to obtain a unique hydrophilic-hydrophobic pol3nner, which may be used as a good emulsifying agent, electrostatic charge reducer, or compatib-lizer for pol3nner blends. 

Figure 1 shows GPC curves of the polystyrenes terminated with epichloro-hydrin and with methyl alcohol. It can be seen that molecular weight distribution of the polystyrene terminated with methyl alcohol is quite narrow = 1.05) whereas, there appears a shoulder in the GPC curve of the polystyrene terminated with epichlorohydrin, or so called epoxy ether terminated macromer, and so the polydispersity is wider 1.1-1.2). The... 

Different kinds of solvents also exert an influence on the PSep% of the macromer formed. Table 2 shows that cyclohexane seems to be the best solvent for the synthesis of macromer. This may be attributed to the fact that cyclohexane is a comparatively worse solvent than benzene or toluene for polystyrene, which exhibits a random coil form in cyclohexane and more likely Includes the ion pair within the coil. This condition is favorable for the formation of epoxy ether terminated polystyrene. 

Figure 3 shows the effect of reaction temperature on PSep content. It can be seen that 50 C is the best reaction temperature for the formation of epoxy ether terminated macromer. Side reactions occur at temperatures higher than 50 C. When the reaction was carried out at lOO C for 2 hours, a large amount of chlorine ions existed in the water extract of the product, corresponding close to 16 times the amount of the equivalent of PSep. 

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