橡胶微观结构对NBR硫化加工特性的影响  

Effect of microstructure of rubber on properties of NBR vulcanization processing

作　　者：陈福花 王炳昕 刘莉[3] 

机构地区：[1]青岛中化新材料实验室,山东青岛266042 [2]青岛新材料科技工业园发展有限公司,山东青岛266111 [3]青岛科技大学高性能聚合物研究院,山东青岛266042

出　　处：《弹性体》2012年第3期83-87,共5页China Elastomerics

基　　金：山东省自然科学基金项目(ZR2010El020)

摘　　要：研究了丁腈橡胶(NBR)微观结构对NBR及NBR/炭黑混炼胶硫化加工性能的影响。研究表明:丙烯腈含量增加,分子极性增加,物理交联密度增加,致使焦烧时间缩短,正硫化时间先增长后缩短,提高了胶料的加工性能,硫化速度先增加后减小。加入炭黑后,对低丙烯腈含量的NBR1846的硫化转矩影响最大,减小了因丙烯腈含量造成的流变性能的变化,缩短了硫化时间,提高了硫化转矩和硫化程度,但炭黑对NBR的硫化速度影响不明显。The influence of the microstructure of rubber on the vulcanization processing properties of NBR was studied. The results showed that. with the acrylonitrile content （ACN）inereasing, NBR molecular polarity increases, physical crosslink density increases, the scorch time is shortened, opti- mum cure time, curing rate and chemical crosslink density climb up and then decline, and improve com- pound fluidity improves. Under smaller ACN, the influence of carbon black on the curing torque is larger. The scorch time and optimum cure time increase with carbon black. But the effect of carbon black on vulcanization speed of NBR compounds is not obvious.

关 键 词：NBR 微观结构 炭黑 界面相互作用 硫化加工特性 

分 类 号：TQ333.7[化学工程—橡胶工业]