| 摘要 |
The invention provides a compound of the formula: wherein Ar is selected from the group consisting of aryl, monosubstituted aryl and poly-substituted aryl, heteroaryl, monosubstituted heteroaryl and polysubstituted heteroaryl; Ar′is selected from the group consisting of aryl, monosubstituted aryl and polysubstituted aryl, heteroaryl, monosubstituted heteroaryl and polysubstituted heteroaryl; R is an alkylene radical having 2-20 carbon atoms; and n=1-20. The compounds of the invention are used with polymer resins to enhance their gas barrier properties.
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