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Influence of sulphonation process on the properties of modified PP fibres [Elektronski vir]
Stakne, Kristina ...
Sulphonation is a well-known procedure for introducing cation exchange groups upon polymer. The article presents the differences between standard sulphonation method and sulphonation of polypropylene ...fibres in an ultrasound bath. In both methods different conditions were used. Modified polypropylene fibres were characterized by zeta potential measurements. Electrokinetic properties of modified fibres were influenced by the sulphonation process. Fibres sulphonated in an ultrasound bath show higher zeta potential plateau and the isoelectric points are shifted towards the acid region in comparison to the fibres, sulphonated by the standard method. The detected differences are probably due to the changes of crystalline structure of polypropylene through ultrasonic vibration.
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