甲基丙烯酸锌补强氢化丁腈橡胶的反应活化能及硫化温度对氢化丁腈橡胶性能的影响  

Reaction Activation Energy of Zinc Acrylate Reinforced Hydrogenated Nitrile Rubber and Influence of Cure Temperature on Its Mechanical Property

作　　者：郑方远 王雷雷 卢雪 赵菲[2] Fangyuan Zheng;Leilei Wang;Xue Lu;Fei Zhao(SINOPEC(Beijing)Research Institute of Chemical Industry Co.,Ltd.Yanshan Branch,National Engineering Research Center for Synthesis of Novel Rubber and Plastic Materials,Beijing 102500,China;Key Laboratory of Rubber-Plastic and Engineering,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]中石化(北京)化工研究院有限公司燕山分公司橡塑新型材料合成国家工程研究中心,北京102500 [2]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《高分子材料科学与工程》2024年第12期78-84,共7页Polymer Materials Science & Engineering

摘　　要：采用差示扫描量热(DSC)分析了在过氧化物1,4-双叔丁基过氧异丙基苯(BIBP)作用下,甲基丙烯酸锌(ZDMA)自聚、氢化丁腈橡胶(HNBR)硫化及ZDMA补强HNBR时各组分的反应活化能及硫化温度对HNBR性能的影响。结果表明,单用体系中,HNBR的硫化反应活化能高于ZDMA的自聚活化能。而在ZDMA/HNBR体系中,由于ZDMA对HNBR硫化的助交联作用,其自聚反应的活化能升高,HNBR硫化反应及ZDMA与HNBR间的离子交联反应的活化能降低。这意味着ZDMA补强HNBR时,硫化温度升高将更有利于ZDMA的自聚补强,但会使HNBR的硫化及ZDMA与HNBR间的交联反应程度降低。不同硫化温度得到的HNBR硫化胶的交联密度和物理力学性能验证了这一结果:硫化温度升高,HNBR的交联密度降低,HNBR的硬度和定伸应力降低,而补强PZDMA形成的数量增多,使HNBR的拉伸和撕裂强度升高。The reaction activation energy of self-polymerization of zinc dimethacrylate(ZDMA),vulcanization of hydrogenated nitrile rubber(HNBR)and corresponding reaction ingredient in ZDMA reinforced HNBR with 2,4-di-tert-butylisopropylbenzene peroxide(BIBP)was determined by DSC.The results show that in single system,the reaction activation energy of HNBR’s vulcanization is higher than that of ZDMA’s self polymerization.While in the ZDMA reinforced HNBR system,the reaction activation energy of ZDMA’s self polymerization is higher than that of HNBR’s vulcanization and crosslinking between HNBR and polymerized ZDMA(PZDMA)due to the co-crosslinking function of ZDMA.The change of activation energy indicates that in the ZDMA reinforced HNBR system,higher cure temperature is beneficial to the self-polymerization of ZDMA,while less crosslinks tend to be formed in HNBR and between HNBR and PZDMA.The results also show that with the increasing of cure temperature,HNBR vulcanizates have lower hardness and modulus due to the decrease of crosslink density,and higher tensile and tear strength resulted from the formation of more reinforcing particles of PZDMA.The result is coincided with the obtained reaction activation energy.

关 键 词：氢化丁腈橡胶 甲基丙烯酸锌 补强 活化能 

分 类 号：TQ333.7[化学工程—橡胶工业]