用橡胶加工分析仪测定过氧化物硫化三元乙丙橡胶的交联密度  

Measurement of crosslink density of peroxide cured ethylene-propylene-diene monomer by rubber process analyzer

作　　者：徐正伟[1] 范青博 邱桂学[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2015年第6期452-455,共4页China Synthetic Rubber Industry

摘　　要：利用橡胶加工分析仪(RPA)测得二(叔丁基过氧化异丙基)苯(BIPB)硫化三元乙丙橡胶(EPDM)的硫化曲线,依据理想橡胶弹性方程计算得到EPDM硫化胶的交联密度,并与平衡溶胀法和单轴拉伸法测得结果进行了比较。结果表明,由平衡溶胀法、单轴拉伸法和硫化曲线法测得EPDM硫化胶的交联密度呈现相似的变化规律,即交联密度随着BIPB用量的增加而增大,但又因分子链缠结不同而存在差异;平衡溶胀法与硫化曲线法测得EPDM硫化胶的交联密度相关性比较好,因而利用RPA测定硫化胶的交联密度是可行的。Based on the ideal rubber elasticity equation, crosslink density of di（tert-butylperoxyiso- propyl） benzene （BIPB） cured ethylene-propylene- diene monomer （EPDM） was calculated from cure curves measured by rubber process analyzer （RPA）, and the measured results were compared with those measured by equilibrium swelling method and stress-strain method. The results showed that the values of crosslink density obtained by abovementioned 3 methods all increased with increasing content of BIPB, exhibiting a similar change trend,however, there were difference among the data by the 3 methods owing to the different extents of entan- glement. But those from equilibrium swelling and cure curve methods had a good correlation, so that RPA cure curve method was available to measure crosslink density.

关 键 词：二(叔丁基过氧化异丙基)苯 三元乙丙橡胶 交联密度 平衡溶胀法 单轴拉伸法 橡胶加工分析仪 

分 类 号：TQ333.4[化学工程—橡胶工业]