硫化工艺对天然橡胶发泡材料静刚度和动静刚度比的影响  

Effect of Curing Conditions on Static Stiffness and Spring Ratio of NR Foam

作　　者：谭宇[1] 胡庆华[1] 胡天辉[1] 陈平[1] 黄自华[1] 

机构地区：[1]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《橡胶工业》2014年第1期36-39,共4页China Rubber Industry

摘　　要：研究硫化温度、时间和压力对天然橡胶(NR)发泡材料静刚度(Ks)和动静刚度比(Kd/Ks)的影响。结果表明:在一段硫化中,NR发泡材料的Ks随着硫化温度的升高、时间的延长和压力的增大而增大,Kd/Ks随着温度的升高而增大,随着时间的延长而减小,几乎不随压力变化。在二段硫化中,NR发泡材料的Ks和Kd/Ks随着硫化温度的升高和时间的延长而减小,随着压力的增大而先增大后减小。当一段硫化条件为115℃/10MPa×15min、二段硫化条件为150℃/10MPa×10min时,NR发泡材料能满足减震垫板成型的指标要求。The effects of curing temperature, time and pressure on the static stiffness （Ks） and spring ratio（Kd/Ks） of NR foam were investigated. The results showed that,at the first curing stage, as the curing temperature, time and pressure increased, the K＋ of NR foam increased; the Kd/K＋ in- creased as the curing temperature increased, decreased as the curing time prolonged, and stayed almost unchanged as the curing pressure increased. At the second curing stage, when the curing temperature and time increased,the Ks and Kd/Ks of NR foam decreased. When the curing pressure increased,the K＋ and Ka/K＋ increased at first and then decreased. The optimized curing conditions were 115℃/10 MPa×15 min and 150℃/10 MPa×10 rain for the first and second curing stage,respectively. The NR foam prepared at the optimized conditions met the technical requirements of damping plate.

关 键 词：天然橡胶 发泡材料 硫化条件 

分 类 号：TQ332[化学工程—橡胶工业]