Polar functional groups, oxygenation with

Table 1 lists several compounds and their Henry s constants taken from Ashworth et al. [5]. For compounds of similar structure, heavier compounds tend to have smaller Henry s constant values. For compounds of similar size, those with polar functional groups (e.g., oxygen, nitrogen, sulfur) tend to have smaller Henry s constant values. This explains why methyl ethyl ketone (MW=72) has a Henry s constant that is orders of magnitude less than chloroethane (MW=64). 

Table 3 lists values of Kow for several different compounds. For compounds of similar structure (e.g., hydrocarbons), heavier compounds will generally have greater Kows. For compounds of similar size, compounds with oxygen or other polar functional groups will have smaller Kows. For example, the Kow for DDT is... 

The bulk structure is predominantly amorphous and the surface is hydrophobic. During activation with oxygen polar functional groups such as hydroxyl, both car-... 

With a patented [1], proprietary surface modification, rubber particles are rendered compatible with polyurethanes. One surface modification is a controlled oxidation of the outermost molecules on each rubber particle. The treatment chemistry involves the reaction of halogen- and oxygen-containing gases with the rubber backbone to form pendant polar functional groups. Figure 1. In fact, the rubber surface becomes so hydrophilic that the treated particles are readily wetted by water. 

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