防渗材料合成及表征介绍.doc

废旧橡胶粉接枝及表征 靳玲 谢孝建 李瑞海 四川大学高分子科学与工程学院，成都市一环路南一段24号 610065 本文研究了过硫酸钾引发丙烯酰胺、丙烯酸在废旧橡胶粉接枝的反应，得到一种新型材料。通过碘值法对原料橡胶粉双键含量进行了测定，探讨了接枝改性的可行性。并且研究了表面活性剂、引发剂、单体浓度、温度等因素对接枝聚合反应的影响，重点分析了橡胶粉预处理工艺对聚合反应的影响以及丙酮等在预处理中的作用。利用傅立叶变换红外光谱对接枝产物的结构进行了表征。研究结果表明，由于橡胶粉和水之间存在界面不相容问题，在无表面活性剂存在的条件下，由于丙烯酸和丙烯酰胺难以越过界面与橡胶接触，所以无法进行接枝聚合反应。只有在存在表面活性剂如十二烷基硫酸钠的条件下，才能进行接枝聚合反应。橡胶粉的前处理方法和工艺对接枝聚合反应有显著的影响。未经处理的橡胶粉无法进行接枝聚合反应。经过碱液和酸液进行处理，可以进行丙烯酰胺的接枝聚合反应。进一步用丙酮处理橡胶粉后，丙烯酸和丙烯酰胺都能同时进行接枝聚合反应。 参考文献 [1] 何永峰，刘玉强. 胶粉生产及其应用－废旧橡胶资源化新技术. 中国石化出版社. [2] 石锐，田明，齐卿，张立群. 橡胶表面改性方法. 橡胶工业, 2006, 53. [3] 刘洪涛，刘晓洪，周彦豪. 特种橡胶制品, 2005, 26(3). The grafting and characterization of the waste rubber powder Ling Jin Xiaojian Xie Ruihai Li College of Polymer Science and Engineering, Sichuan University， 610065 Abstract:：researched that grafting copolymerization of acrylic acid etc onto the waste rubber powder which was initiated by KPS. Through the experiment it is investigated the feasibility of this method and the effection of surfactant,initiator,temperature etc. It is also studied the pretreatment of rubber powder. The structure of the grafted waste rubber powder was characterized by FTIR test. For there is interfacial problem which may block the reaction,without surfactant the graft copolymerisation could be actually impossible. Only with existence of surfactant,such as SDS, graft copolymerisation takes place. The waste rubber powder without any pretreatment,the reaction can’t happen. If the waste rubber powder was pretreated by lye and acid solution,only acrylamide can be grafted. Further acetone treatment make the acrylic acid grafting possible. Keywords: graft copolymerization waste rubber powder 图1.接枝丙烯酸和丙烯酰胺的橡胶粉的红外光谱图 图2.接枝丙烯酸的橡胶粉红外光谱图