氯磺酸磺化聚苯乙烯-二乙烯基苯树脂

以氯磺酸为磺化试剂制备磺化聚苯乙烯(SPS)树脂。研究了反应时间、温度、磺化试剂用量、溶剂体系及用量等对反应的影响。通过对反应条件的优化,结果表明:溶剂可为氯仿或CCl4。最佳溶剂用量为10ml.g-1树脂。最佳反应时间为30min,磺化剂与树脂最佳摩尔比为1∶1。控制磺化剂用量、反应时间,可在0～5.4mmol.g-1磺酸基担载量范围可控。该方法具有反应温度低、时间短、投料量少,磺化度高,保护环境等优点。

Poly(styrene-co-divinylbenzene)resins sulfonated by chlorosulfonic acid

Sulfonated poly(styrene-co-divinylbenzene) resins (SPS) present many advantages,so they have been widely studied in laboratory and applied in industrial processes.To lower their price for potential applications,low-price sulfonating agents are used to convert polystyrene (PS) to SPS.The traditional sulfonating agents are sulphuric acid,fuming sulfuric acid and SO_3,but sulphuric acid leads to high cost and pollution,and SO_3 makes the sulfonation reaction violent,in which local overheating,oxidation and coking are observed.This work reports a new method that SPS is synthesized by PS-DVB and chlorosulfonic acid (HSO_3Cl).The influence factors on the sulfonation reaction,such as reaction time,temperature,solvents,amount of sulfonating agent,were investigated.Some results are obtained.(1) The solvent may be chloroform or carbon tetrachloride (CCl_4).(2) The optimized reaction time is 30 min and the optimized mole ratio of HSO_3Cl to PS is 1∶1.(3) By controlling the amount of sulfonating agent and reaction time,the sulfonic loading can be controlled in the range of 0-5.4 mmol·g~(-1).When HSO_3Cl is used as the sulfonating agent,HCl is easy to remove,making the sulfonation reaction more complete.This method has many advantages over the traditional process,such as low temperature,short reaction time,more complete sulfonation and friendly environment and provides potential use of sulfonation products.