硫酸铜含量对硫酸铜与丁腈橡胶之间配位交联反应的影响  

EFFECT OF COPPER SULFATE CONTENT ON COORDINATION CROSSLINKING REACTION BETWEEN COPPER SULFATE AND ACRYLONITRILE-BUTADIENE RUBBER

作　　者：袁晓芳[1] 吴国章[1] 吴驰飞[1] 

机构地区：[1]华东理工大学材料科学与工程学院高分子合金研究室,上海200237

出　　处：《高分子学报》2007年第3期272-276,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50473031)资助项目

摘　　要：利用丁腈橡胶(NBR)的可配位侧基——腈基(—CN)与金属盐硫酸铜(CuSO4)的铜离子(Cu2+)之间的配位反应制备了一种配位交联CuSO4/NBR.影响该配位交联反应的因素众多,如热压温度、热压时间、增塑剂等等,考察了CuSO4含量对其的影响.通过X射线光电子能谱(XPS)、动态力学分析(DMA)、差示扫描量热分析(DSC)等手段对CuSO4与NBR之间的配位交联反应进行了分析,并对所得配位交联的CuSO4/NBR进行了交联密度及力学性能的测试.结果发现,随CuSO4含量的不断增加,CuSO4与NBR的配位交联程度逐渐增强,且所得配位交联CuSO4/NBR显示出从典型橡胶到韧性塑料再到脆性塑料的力学转变特性.另外,通过扫描电子显微镜(SEM)及X射线能谱仪(EDX)对材料的微观结构进行了分析,发现CuSO4在聚合物基体中不仅充当交联剂的角色,而且还起着增强填料的作用.A novel approach to in situ crosslinking of copper sulfate （CuSO4 ）/acrylonitrile-butadiene rubber （NBR） between nitrile groups （-CN） of NBR and copper ions（Cu^2＋ ） of CuSO4 was developed. The coordination crosslinking reaction is influenced by many factors, such as the temperature and the time of heat pressing, the -CN content in NBR, the crystal water of metal salts, addition of the plasticizer and etc. The effect of the CuSO4 content on the coordination crosslinking reaction was investigated using X-ray photoelectron spectroscopy （XPS）, dynamic mechanical analysis （ DMA）, differential scanning calorimetry （ DSC）, equilibrium swelling method and tensile tests. The results show that the extent of coordination crosslinking reaction between CuSO4 and NBR increases with the rise of CuSO4 content. The coordination crosslinked NBR exhibits distinguishing mechanical behavior with increasing the CuSO4 content,from a typical rubber to a ductile and finally to a brittle plastics. Moreover, the scanning electron microscope （SEM） and energy dispersive X-ray spectrum （EDX） results suggested that the coordination crosslinking occurs on the surface of the CuSO4 particles, and the CuSO4 particles not only act as the crosslinking agents, but also the reinforcing inorganic filler in the matrix. These are the essential reasons why the coordination crosslinked CuSO4/ NBR exhibits the special and excellent mechanical properties.

关 键 词：配位反应 交联 丁腈橡胶 硫酸铜 

分 类 号：TQ330.1[化学工程—橡胶工业]