炭黑用量对不同橡胶低温性能的影响(Ⅰ)  

Effect of Carbon Black Dosage on Low Temperature Performance of Different Rubber(I)

作　　者：史浩楠 赵永健 温新龙 史新妍[1] 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)

机构地区：[1]青岛科技大学高分子科学与工程学院,橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2024年第5期112-118,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)。

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,炭黑N550用量采用0、10、30、50、70份,使用差示扫描量热仪(DSC)、低温回缩试验仪、低温脆性试验机对不同用量炭黑填充硫化胶低温性能进行表征,3种测试仪器表征的低温性能分别是玻璃化转变温度(Tg),回缩10%对应温度(TR10)以及脆性温度(Tb)。结果表明,极性胶NBR、ACM的T_(g)、T_(R10)随炭黑用量增加变化幅度较大,而非极性胶NR、EPDM的T_(g)、T_(R10)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)、T_(R10)变化幅度相近。同样的,NR和EPDM也表现出相同规律,说明橡胶的饱和性对橡胶的Tg与TR10影响无关联。炭黑填充量对橡胶Tb的影响规律因橡胶种类的差异而表现出多元化,与结合胶含量无关,且与橡胶的极性和饱和性不存在明显的关系,其中EPDM橡胶表现出了最低的脆性温度,且远低于其Tg。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)with different polarity and saturation were selected as the matrix rubber,and the dosage of carbon black N550 was 0,10,30,50 and 70 parts,and the low-temperature performance of sulfurized rubber filled with different amounts of carbon black was characterized by differential scanning calorimeter(DSC),low-temperature retraction tester and low-temperature brittleness testing machine.The corresponding low temperature performance of the three test methods is glass transition temperature(T_(g)),10%retraction corresponding temperature(T_(R10))and brittleness temperature(Tb).The results showed that the T_(g)and T_(R10)of polar rubber NBR and ACM changed greatly with the increase of carbon black dosage,while the T_(g)and T_(R10)of non-polar rubber NR and EPDM changed less,which was positively correlated with the content of binding glue.Although there is a saturation difference be-tween NBR and ACM,the T_(g)and T_(R10)changes are similar.Similarly,NR and EPDM also exhibit the same pattern,indicating that the saturation of rubber has no correlation with the effect of T_(g)and T_(R10)of rubber.The influence of carbon black filling amount on rubber Tb is diversified due to the difference of rubber types,which has nothing to do with the content of binding glue,and has no obvious relationship with the polarity and saturation of rubber,among which EPDM rubber shows the lowest brittle temperature and is much lower than its T_(g).

关 键 词：橡胶 玻璃化转变温度 低温回缩温度 低温脆性温度 

分 类 号：TQ330.7[化学工程—橡胶工业]