prov:value
| - ' -] n wherein R is selected from hydrogen, hydroxyl, and substituted or unsubstituted alkyl, alkoxy, aryl, alkaryl, aralkyl, and alkenyl groups, R' is a linking group, X is a counter ion, n is the degree of polymerisation and is between 40 and 70, wherein at least 50% of the di-substituted pyridinium polymer chains in the composition have the same degree of polymerisation. [0034] The compositions
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