摘要
分别用氢氧化铵、乙胺、二乙胺和三乙胺中和磺化乙现三元胶（Ｓ－ＥＰＤＭ－Ｈ）溶液，制得含－ＳＯ３＾－Ｎ＾＋Ｈ４－ｘＥｔｘ离子对的４种离聚物。元素分析、应力－应变、介电性能和密度测试结果表明：随着中和试安中乙基数（ｘ）的增加，中和度、离聚物的机械强度和密度均下降，介电损耗β＇峰移向低温。ｘ＝０时，β＇峰分裂成β和α两个损耗峰。说明该离聚物子聚集成离子簇，成为两相体系；ｘ＞１，离子聚集成多重离子。
Four different ionomers containing-ionic groups were prepared by neutralizing the sulfonated EPDM with ammonium hydroxide,ethylamine,diethylamine and triethylamine respectively.The elemental analysis, stress-strain, dielectric properties and density measurement data showed that the neutralization degree,tensile strength,temperature of β′relaxation peaks and the density of the ionomers all decreased with the increase of the ethyl group numbers(x)in different amines, which were utilized as a neutralizing agent.When x=0, relaxation peak splited into two relaxation peaks αand β,which indicated that the ionic groups(-SO3NH4)in the ionomers aggregated into compact ion clusters, and resulted in two phases morphology.However,in the case of x>1 and the precursor S-EPDM-H, the homogeneous phase morphology system was still maintained because the ionic groups only gathered into multiplets. As the number x increased,the volume of the ion pair increased and the positive charge of the nitrogen atoms decreased, hence the cohesionenergy of the ion pairs, as well as the rigidity of the multiplet and the densities of the samples decreased.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第9期1399-1403,共5页
Chemical Journal of Chinese Universities
基金
江苏省应用基础研究基金
关键词
磺化
乙丙三元胶
离聚物
胺中和
Sulfonated ethylene-propylene-triatomic rubber(S-EPDM-H),Ionomer,Dielectric property
