摘要
选用极性与饱和度不同的天然橡胶(NR)、丁腈橡胶(NBR)、三元乙丙橡胶(EPDM)、活氯型丙烯酸酯(ACM)4种橡胶为基体胶,分别填充30份的不同粒径炭黑N774、N550、N234,通过使用差示扫描量热仪(DSC)、低温回缩试验机、低温脆性试验机来完成不同炭黑粒径填充各种橡胶的低温性能的表征,3种测试仪器表征的低温性能分别是玻璃化转变温度(T_(g)),回缩10%对应温度(TR_(10))以及脆性温度(T_(b))。结果表明,不同炭黑粒径下极性胶NBR、ACM的T_(g)变化幅度较大,非极性胶NR、EPDM的T_(g)变化较小,与结合胶含量成正相关;虽然NBR和ACM存在饱和性差异,但两者的T_(g)变化幅度相近,NR和EPDM间的T_(g)变化幅度也相近,橡胶的饱和性对橡胶T_(g)影响无关联。炭黑粒径对不同结构橡胶的TR_(10)影响微弱。极性胶的T_(b)更容易受到炭黑粒径的影响,而T_(b)的变化规律与橡胶的饱和性差异不存在明显的相关性。
In this study,four kinds of rubber,natural rubber(NR),nitrile rubber(NBR),ethylene propylene diene monomer(EPDM),and acrylate rubber containing active chlorine(ACM),which had different polarity and saturation,were selected as the base rubber,and 30 parts of carbon black N774,N550 and N234 of different particle sizes were filled respectively,and the low-temperature performance of various rubbers filled with different carbon black particle sizes was characterized by using differential scanning calorimeter(DSC),lowtemperature retraction testing machine and low-temperature brittleness testing machine.The low temperature performance characterized by the three test instruments is the glass transition temperature(T_(g)),the 10%retraction corresponding temperature(TR_(10))and the brittle temperature(T_(b)).The results showed that the T_(g)of polar rubber NBR and ACM under different carbon black particle sizes was large,and the T_(g)change of non-polar rubber NR and EPDM was small,which was positively correlated with the content of binding rubber.Although there are saturation differences between NBR and ACM,the T_(g)change amplitude of the two is similar,and the T_(g)change amplitude between NR and EPDM is also similar,and the saturation of rubber has no correlation with the effect of rubber T_(g).Carbon black particle size has a weak effect on TR_(10) of rubber with different structures.The T_(b)of polar rubber is more susceptible to the influence of carbon black particle size,and there is no obvious correlation between the change law of T_(b)and the saturation difference of rubber.
作者
史浩楠
赵永健
温新龙
史新妍
SHI Haonan;ZHAO Yongjian;WEN Xinlong;SHI Xinyan(College of Polymer Science and Engineering,Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China)
出处
《青岛科技大学学报(自然科学版)》
CAS
2024年第6期85-91,共7页
Journal of Qingdao University of Science and Technology:Natural Science Edition
基金
山东省自然科学基金项目(ZR2020KE054).
关键词
橡胶
玻璃化转变温度
低温回缩温度
低温脆性温度
rubber
glass transition temperature
low temperature retraction temperature
low temperature brittleness temperature
