Two kinds of new chelating resins containing heterocyclic functional group(1-amino-5-methylthio-1,3,4-thia-dizole) were synthesized from macroporous chloromethylated polystyrene.Their structures were characfterized by...Two kinds of new chelating resins containing heterocyclic functional group(1-amino-5-methylthio-1,3,4-thia-dizole) were synthesized from macroporous chloromethylated polystyrene.Their structures were characfterized by elemental analysisand infrared spectra.Their adsorption properties for Cu2 +,Pb2 +,Ni2 +,Zn2 +,Ag+and Hg2 +had been studied.The results showthatthe newly synthesized resins have highly selective for Ag+and Hg2 +and the resin has no affinity for Cu2 +、Pb2 +and Ni2 +.The in-troduction of hydrophilic polyvinyl alcohol spacer arm can increase the adsorption capacity and the length of spacer arm has effecton the adsorption capacities.展开更多
采用差示扫描量热法,研究了丙烯腈(AN)/丙烯酸(AA)共聚物在空气中的低温热解反应,利用K iss inger方法,计算了AN/AA共聚物热解反应的表观活化能,讨论了不同聚合工艺对共聚物热解反应表观活化能的影响。结果表明,随混合溶剂中二甲基亚砜...采用差示扫描量热法,研究了丙烯腈(AN)/丙烯酸(AA)共聚物在空气中的低温热解反应,利用K iss inger方法,计算了AN/AA共聚物热解反应的表观活化能,讨论了不同聚合工艺对共聚物热解反应表观活化能的影响。结果表明,随混合溶剂中二甲基亚砜含量的增加,共聚物热解反应表观活化能增加;随共聚单体AA含量的增加,共聚物热解反应表观活化能降低;当AA与AN质量配比高于5/95后,共聚物热解反应表观活化能变化不大;随反应温度增加,共聚物热解反应表观活化能增加。展开更多
文摘Two kinds of new chelating resins containing heterocyclic functional group(1-amino-5-methylthio-1,3,4-thia-dizole) were synthesized from macroporous chloromethylated polystyrene.Their structures were characfterized by elemental analysisand infrared spectra.Their adsorption properties for Cu2 +,Pb2 +,Ni2 +,Zn2 +,Ag+and Hg2 +had been studied.The results showthatthe newly synthesized resins have highly selective for Ag+and Hg2 +and the resin has no affinity for Cu2 +、Pb2 +and Ni2 +.The in-troduction of hydrophilic polyvinyl alcohol spacer arm can increase the adsorption capacity and the length of spacer arm has effecton the adsorption capacities.
文摘采用差示扫描量热法,研究了丙烯腈(AN)/丙烯酸(AA)共聚物在空气中的低温热解反应,利用K iss inger方法,计算了AN/AA共聚物热解反应的表观活化能,讨论了不同聚合工艺对共聚物热解反应表观活化能的影响。结果表明,随混合溶剂中二甲基亚砜含量的增加,共聚物热解反应表观活化能增加;随共聚单体AA含量的增加,共聚物热解反应表观活化能降低;当AA与AN质量配比高于5/95后,共聚物热解反应表观活化能变化不大;随反应温度增加,共聚物热解反应表观活化能增加。