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孙学红, 崔宝平, 孙举涛
(青岛科技大学 高分子科学与工程学院,山东 青岛 266042)
摘要: 为了揭示天然橡胶(NR)高温疲劳性能与硫化特性的关系,采取屈挠疲劳模式,考察了NR硫化胶100 ℃下的疲劳寿命与普通硫化体系(CV)、半有效硫化体系(SEV)、CV~SEV过渡体系及工艺正硫化时间(t90)、理论正硫化时间(t100)的关系,并与25 ℃的性能进行对比。研究结果表明:硫化时间采取t90时,25 ℃下普通硫化体系(CV)的疲劳寿命最高,100 ℃下半有效硫化体系(SEV)的最高;不同配方的硫化胶,100 ℃下的屈挠疲劳寿命均高于25 ℃下的;25 ℃下疲劳时,硫化时间以t100为佳,100 ℃下疲劳时,硫化时间以t90为佳。
关键词: 天然橡胶; 屈挠疲劳; 硫化体系; 硫化时间; 高温疲劳
中图分类号: O 063文献标志码: A
引用格式:孙学红, 崔宝平, 孙举涛. NR的高温疲劳性能与其硫化特性的关系\[J\].青岛科技大学学报(自然科学版),2017,38(4):90-94.
SUN Xuehong,CUI Baoping,SUN Jutao. Relationships between high temperature fatigue and curing characteristics for NR compounds\[J\]. Journal of Qingdao University of Science and Technology(Natural Science Edition),2017,38(4):90-94.
Relationships Between High Temperature Fatigue and Curing Characteristics for Natural Rubber Compounds
SUN Xuehong, CUI Baoping, SUN Jutao
(College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: In order to reveal the relationship between the high temperature fatigue properties of NR and curing characteristics, the effects of Conventional Vulcanization (CV),CV~SEV, Semi Effective Vulcanization (SEV) and t90,t100 curing time on the high-temperature fatigue life (at 100 ℃) of NR compounds were studied by flex cracking fatigue, and were compared with the data at 25 ℃. The results showed that the highest fatigue life of CV was highest at 25 ℃, while at 100 ℃ it was the one of SEV. For these different NR compounds, their fatigue life at 100 ℃ was higher than that of the one at 25 ℃. And t100 should be chosen as the curing time when it was fatigued at 25 ℃, while it was t90 when fatigued at 100 ℃.
Key words: natural rubber; flex cracking fatigue; curing system; high temperature fatigue
收稿日期: 2016-03-10
基金项目: 国家自然科学基金项目(51372128);绿色轮胎与橡胶协同创新中心开放课题资助项目(2014GTR0001).
作者简介: 孙学红(1972—),女,副教授,博士.
文章编号: 1672-6987(2017)04-0090-05; DOI: 10.16351/j.16726987.2017.04.014