STUDY ON THE DIELECTRIC PROPERTY OF POLYETHER-POLYURETHANE ZWITTERIONMERS

GU Xue-rong; CHEN Nan-dou; ZHONG Jun-shi; YANG Chang-zheng

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STUDY ON THE DIELECTRIC PROPERTY OF POLYETHER-POLYURETHANE ZWITTERIONMERS

Research Article | 更新时间：2021-03-19

- STUDY ON THE DIELECTRIC PROPERTY OF POLYETHER-POLYURETHANE ZWITTERIONMERS
- Acta Polymerica Sinica Issue 4, Pages: 284-289(1988)
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- Published：20 August 1988，
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GU Xue-rong, CHEN Nan-dou, ZHONG Jun-shi, YANG Chang-zheng. STUDY ON THE DIELECTRIC PROPERTY OF POLYETHER-POLYURETHANE ZWITTERIONMERS. [J]. Acta Polymerica Sinica (4):284-289(1988)
DOI：

GU Xue-rong, CHEN Nan-dou, ZHONG Jun-shi, YANG Chang-zheng. STUDY ON THE DIELECTRIC PROPERTY OF POLYETHER-POLYURETHANE ZWITTERIONMERS. [J]. Acta Polymerica Sinica (4):284-289(1988) DOI：

摘要

以4

4＇-二苯基甲烷二异氰酸酯(MDI)、N-甲基二乙醇胺(MDEA)和聚四氢呋喃(PTMD)以2:1:1(mol比)合成聚醚型聚氨酯

MDEA的叔胺基与γ-丙磺内酯反应

制备了不同磺化程度的双离子型离聚物.在不同温度与频率(-150-30℃

20Hz—100KHz)下

测定了其介电性能.结果表明

随离子化程度的提高

ε＇增大

α弛豫介电损耗峰移向低温

说明相分离越趋完善;β弛豫单元的活化能(△Hβ)基本不变;α弛豫单元的活化能(△Hα)依次变小.介电测量结果与动态力学方法研究结果相吻合.

Abstract

Polyether polyurathane based on 4

4'-diphenylmethane diisocyanate (MDI)

N-methyl di-ethanolamine. (MDEA) and pplytetramethylene oxide (PTMO) were synthesized in the tertiary molar ratio of 2:1:1. As a result of the reaction of the tertiary amine of MDEA with γ-propane Sulfone

a series of zwitterionomers were prepared in different degrees of sulfo-nation. The dielectric properties of these samples were determined in different temperatures ( - 150 to 30℃) and frequencies (20 Hz to 100 kHz)

It was found that as the degree of sul-fonation increases

the real permittivity (ε') is increased and the dielectric loss peak of a-relaxation shifts to lower temperatures indicating as improvement of phase seperation and the activation energy of a-relaxation (Ha) was decreased while thet of β-relaxation (Hβ) was nearly unchanged. The results of the dielectric measurement coincide with the dynamic me-chanical analysis.

关键词

介电性能聚氨酯离聚物

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