ENTRAPMENT OF FUNCTIONALIZED ETHYLENE OLIGOMERS IN POLYETHYLENE
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Functionalization of polyethylene by entrapment of functionalized ethylene oligomers in precipitates of polyethylene is described. The reactivity of the resulting entrapped functionalized ethylene oligomers toward various reagents and the degree of mobility of these entrapped ethylene oligomers in the presence of various solvents were evaluated by using ethylene oligomers containing spin labels as reporter groups. The results show that ethylene oligomers of v = 2500 can be quantitatively and reproducibly entrapped in polyethylene powders by coprecipitation with high-density polyethylene and that the polar functional groups of these ethylene oligomers can interact with solvents and with reagents in solution when these functionalized polyethylene powders are suspended in various solutions. Studies of the reactivity and dynamics of the entrapped oligomer's functional groups toward reagents in solution also show the effect of solvation on reactions of functionalized polyethylene and demonstrate that the dimensions of the interfacial region of polyethylene (i.e., the effective surface dimensions of polyethylene in contact with solutions) are dependent on the parameters of the particular experiment being conducted. 1984, American Chemical Society. All rights reserved.