| http://www.w3.org/ns/prov#value | - ompound of formula (I).The invention further provides a method of enhancing the crystallinity of a polyolefin by adding an eff&ctive amount of a sulfonic acid salt of a compound of formula (I), or a salt thereof, to the polyolefin.The sulfonic acid salts of compounds of formula (I) act as modifying agents, e.g. nucleating and/or clarifying agents, for polyolefins.
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