均匀化工艺参数对天然橡胶理化性能的影响
Influence of Homogenization Process Parameters on Physicochemical Properties of NR
刘丽 1贾爱瑞 1卢媛 1路官山 1张丽杰1
作者信息
- 1. 山东玲珑轮胎股份有限公司,山东 招远 265400
- 折叠
摘要
对照GB/T 15340-2008的均匀化工艺,从开炼机辊温、辊距和过辊次数考察均匀化工艺参数对天然橡胶(NR)理化性能的影响,并验证优化均匀化方案的适用性.结果表明:在NR均匀化过程中,辊温对室温没有依赖性,室温不需严格控制;NR的理化性能对辊距不敏感,对过辊次数较敏感,过辊6次的NR的门尼粘度接近未均匀化的NR的门尼粘度,NR的优化均匀化方案为辊距(1.7±0.17)mm,辊温(25±5)℃,过辊次数 6;采用优化均匀化方案与采用GB/T 15340-2008的均匀化工艺的NR的挥发分含量、塑性保持率和硫化特性没有明显差异;采用优化均匀化方案均匀化的NR的门尼粘度[ML(1+4)100℃]明显增大,优化均匀化方案在国内实验室适用,所加工的NR的均匀性和重复性均较好.
Abstract
With reference to the homogenization process of GB/T 15340-2008,the influence of homogenization process parameters on the physicochemical properties of natural rubber(NR)was investigated in terms of roll temperature,roll distance and number of roll passes through the rollers in open mill,and the applicability of the optimized homogenization scheme was verified.The results showed that,during the homogenization process,the roller temperature had no dependence on the room temperature,so that the room temperature did not need to be strictly controlled.The physicochemical properties of NR were not sensitive to the roller distance,but were more sensitive to the number of passes through the rollers.The Mooney viscosity of NR after 6 passes through the rollers was close to that of NR without homogenization.The optimized homogenization scheme for NR was roller distance of(1.7±0.17)mm,roller temperature of(25±5)℃and passes through the rollers of 6.There was no significant difference in the volatile matter content,plasticity retention and vulcanization characteristics of NR homogenized by the optimized homogenization scheme and the homogenization process of GB/T 15340-2008.The Mooney viscosity[ML(1+4)100℃]of NR homogenized by the optimized homogenization scheme was significantly improved.The optimized homogenization scheme was applicable in domestic laboratories,and the processed NR had good uniformity and repeatability.
关键词
天然橡胶/均匀化/工艺参数/理化性能Key words
NR/homogenization/process parameter/physicochemical property引用本文复制引用
出版年
2025
NETL
NSTL
万方数据