PU接枝抗静电改性的研究

Study on antistatic modification of PU by grafting

在紫外光的照射下 ,过氧化二苯甲酰 (BPO)引发醋酸乙烯酯 (VAC)在聚氨酯 (PU)膜表面进行接枝反应 ,再经过醇解反应 ,使PU膜表面引入羟基 ;在MgCl2 的催化作用下 ,抗静电剂TM与PU膜表面接枝VAC醇解后引入的羟基作用以化学键结合 ,从而使抗静电剂在聚氨酯表面形成交联的网状结构 ,以提高聚氨酯的抗静电耐久性 ;笔者通过SEM、ESCA等研究了PU采用该方法进行的耐久性接枝抗静电改性及其作用机理。

Under UV light,vinyl acetate (VAC) was grafted onto PU membranes,using BPO as photoinitiator,After surface alcoholysis reaction,hygroscopic hydroxyl formed on surface of PU,and antistatic agent TM combined with hydroxyl to form chemical linkage on surface of PU under catalysis of MgCl_2.So antistatic agent formed a structure of cross-linkage net on surface of PU,and it can increase antistatic durability of PU.The antistatic property and mechanism of durable antistatic modification of PU surface was studied by the use of SEM,FTIR and ESCA.