聚苯乙烯三聚氯氰功能化树脂的制备

聚苯乙烯乙二胺树脂(PS-EDA-NH2)和三聚氯氰进行取代反应,制备得到聚苯乙烯三聚氯氰树脂(PS-EDA-C3N3Cl2)。通过优化溶胀时间、反应时间、温度、缚酸剂和pH等反应条件,得出最优反应条件为:聚苯乙烯乙二胺树脂与三聚氯氰的摩尔比为1:1.2,反应时间2h,温度0～5℃,缚酸剂为Na2CO3,聚苯乙烯乙二胺树脂与缚酸剂的摩尔比为1:1,在反应30min后,先控制反应体系pH为弱酸性(pH=3～4),再控制pH为中性(pH=6～7)。反应增重率为27.5%,胺基转化率为61.1%,表面有活性的氯原子达123.2%。制备的三聚氯氰树脂可以作为一个活性中间体,进一步衍生化制备多种功能介质。

Synthesis of Polystyrene Chlorotriazine Resin

Using polystyrene ethylenediamine resin (PS-EDA-NH_2) and cyanuric chloride as raw materials, polystyrene chlorotriazine resin (PS-EDA-C_3N_3Cl_2) was prepared by nucleophilic substitution reaction. The influence factors of the reaction, such as the swelling time, reaction time and temperature, acid-capturer species and pH value, were optimized. The experimental results show that the optimal reaction conditions are as follows: the molar ratio of PS-EDA-NH_2: cyanuric chloride being 1:1.2, reaction temperature of 0～5℃, the acid-capturer being Na_2CO_3 and molar ratio of PS-EDA-NH_2: acid-capturer being 1:1. 30 min after the reaction was started, the reaction system was controlled under weak acidic condition (pH=3～4), then the pH of the reaction system was slowly increased to make the system become under neutral condition (pH=6～7). Under above conditions, the highest weight increasing ratio of the reaction is 27.5%, the degree of amine transformation is 61.1% and the activated chlorine atoms on the surface of the prepared PS-EDA-C_3N_3Cl_2 reach 123.2%. As an active intermediate, many functional media could be obtained by derivatization of the prepared polystyrene chlorotriazine resins.