Gerrit "Ger" Challa (born 18 December 1928)[1] is a Dutch chemist.
He worked ten years for the Institute of Cellulose Research of the Algemene Kunstzijde Unie [nl].
[3] Challa obtained his title of doctor in maths and physics on 13 May 1959 under Jan Ketelaar at the University of Amsterdam.
His thesis was titled: "Formation of polyethylene terephthalate by ester interchange : equilibria kinetics and molecular weight distribution".
[1] After starting as professor at the University of Groningen he set the possibility to study polymer chemistry.