高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (9): 1399.

• 论文 • 上一篇    下一篇

胺中和的磺化乙丙三元胶离聚物的研究

顾雪蓉, 罗凤兰, 张光华, 杨昌正   

  1. 南京大学化学化工学院, 南京, 210008
  • 收稿日期:1993-11-18 修回日期:1994-03-14 出版日期:1994-09-24 发布日期:1994-09-24
  • 通讯作者: 顾雪蓉,女,52岁,副教授.
  • 作者简介:顾雪蓉,女,52岁,副教授.
  • 基金资助:

    江苏省应用基础研究基金

Studies on the Sulfonated EPDM Ionomers Neutralized with Amines

GU Xue-Rong, LUO Feng-Lan, ZHANG Guang-Hua, YANG Chang-Zheng   

  1. College of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210008
  • Received:1993-11-18 Revised:1994-03-14 Online:1994-09-24 Published:1994-09-24

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被引次数

1

摘要： 分别用氢氧比铵、乙胺、二乙胺和三乙胺中和磺化乙丙三元胶(S-EPDM-H)溶液,制得含-SO-3(19940936-1399-1.jpg)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:随着中和试剂胺中乙基数(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。说明该离聚物中离子聚集成离子簇,成为两相体系;x>1时,离子聚集成多重离子对,离聚物为均相体系。随x的增大,离子对体积变大,氮原子的正电性下降,导致离子对间相互吸引力下降,生成的多重离子对刚性变小,试样密度下降。

关键词: 磺化乙丙三元胶, 离聚物, 介电性能

Abstract: Four different ionomers containing--SO-3(19940936-1399-1.jpg)H4-xEtx 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.

Key words: Sulfonated ethylene-propylene-triatomic rubber(S-EPDM-H), Ionomer, Dielectric property

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