%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp; 隨著石化工業的迅速發展,聚苯乙烯泡沫塑料(FPS)被大規模地生產及應用,從而造成了廢FPS污染環境的問題。近年來,人們對廢FPS進行回收利用的研究有了很大的進展,其中有:用其制建筑用密封膠、涂飾劑、生產隔音保溫磚等。我們以廢FPS為主要原料制備出一種建材用膠粘劑,其性能較好。%26nbsp;
(1)原料及試劑%26nbsp;
廢FPS、甲苯、乙酸乙酯、鄰苯二甲酸二丁酯、順丁烯二酸酐、丙烯酸、正丁醇、OP乳化劑。%26nbsp;
(2)儀器%26nbsp;
電磁攪拌器、NDJ-7型旋轉式粘度劑、WXJ-1型強度測定儀、501超級恒溫槽、破碎機。%26nbsp;
(3)制備方法%26nbsp;
將一定量的廢FPS破碎至粒度為0.5~1cm,置于250毫升燒杯中,加入一定量的水,再加入適量的清洗劑,攪拌清洗,然后用水反復漂洗干凈,在烘箱中烤干,備用。%26nbsp;
取100毫升乙酸乙酯、50毫升甲苯于250毫升的三頸燒瓶中,加入102克烘干后的廢FPS,同時開動攪拌器,使廢FPS全部溶解,此時溶液呈無色透明狀。將三頸燒瓶移入76~78度的恒溫槽中水浴,加熱攪拌30分鐘,然后加入10毫升鄰苯二甲酸二丁酯反應一小時。稱取2.5克順丁烯二酸酐,溶于50毫升水中配成溶液,將其緩慢加入到三頸燒瓶中,待溫度升至78度后加速攪拌,再逐滴加入4毫升丙烯酸,70分鐘后加入7毫升OP乳化劑,加熱攪拌20分鐘,加入10毫升正丁醇,繼續攪拌30分鐘,冷至室溫即得膠粘劑。%26nbsp;
膠粘劑的性能指標如下:%26nbsp;
外觀%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;淡黃色粘稠狀液體%26nbsp;
固含量%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;23%%26nbsp;
粘度過難關%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26gt;10000cP%26nbsp;
pH%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;5.0~6.0%26nbsp;
干燥時間%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;30分鐘%26nbsp;
耐水試驗%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;8天無變化%26nbsp;
耐10%HCl試驗%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp; 8天無變化%26nbsp;
耐10%NaOH試驗%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp; 8天無明顯變化%26nbsp;
粘合強度%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;%26nbsp;最大為18N/cm2%26nbsp;
回收廢FPS制建材用膠粘劑,不僅可解決環境污染問題,又可產生很好的經濟效益。