采用磺酸化的方法制备得到了一种新型的磺化聚醚砜酮树脂催化剂(S-PPESK),并采用滴定法对这种催化剂进行了表征.在异丁烯的低聚反应中,对这种新型树脂催化剂的催化活性进行了细致的研究,磺化聚醚砜酮树脂催化剂在反应中表现出了很好的催化活性和优良的二聚选择性.实验结果显示,当催化剂的磺化度(S.D.)增加时,即催化剂的酸量增加时,异丁烯的转化率和三聚物的选择性也增加,但二聚物的选择性降低,四聚物的选择性则几乎没有变化. A novel sulfonated polyethersulfone ketone resin catalyst (S-PPESK) was prepared by sulfonation and the catalyst was characterized by titration.In the oligomerization of isobutylene, The catalytic activity of the resin catalyst has been studied in detail, and the sulfonated polyethersulfone ketone resin catalyst shows good catalytic activity and excellent dimerization selectivity in the reaction.The experimental results show that when the sulfonation degree (SD ) Increases, that is, as the acid amount of the catalyst increases, the conversion of isobutylene and the selectivity of the trimer also increase, but the selectivity of the dimer decreases and the selectivity of the tetramer hardly changes.