SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS*

YANG Guang; CHEN Qun; WANG Yuanshen; YANG Changzheng; WU Xuewen

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SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS*

Papers | Updated：2021-06-21

- SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS*
- Vol. 12, Issue 4, Pages: 302-308(1994)
- Affiliations：
  
  1.   Analytical Center
  2.   East China Normal University
  3.   Shanghai 200062
- Author bio：
- Funds：
- DOI：
  CLC： TQ317
- Published：20 December 1994
- Accepted：
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[1]杨光,陈群,王源身,杨昌正,邬学文.SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS[J].Chinese Journal of Polymer Science,1994,{4}(04):302-308.

YANG Guang, CHEN Qun, WANG Yuanshen, et al. SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS*[J]. 1994, 12(4): 302-308.
[1]杨光,陈群,王源身,杨昌正,邬学文.SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS[J].Chinese Journal of Polymer Science,1994,{4}(04):302-308. DOI：

YANG Guang, CHEN Qun, WANG Yuanshen, et al. SOLID-STATE VARIABLE-TEMPERATURE NMR STUDY ON THE PHASE SEPARATION OF POLYETHER POLYURETHANE ZWITTERIONOMERS*[J]. 1994, 12(4): 302-308. DOI：

摘要

正

Polyether-polyurethane zwitterionomers based on 4

4’-diphenylmethane diisocyanate（MDI）

methyl diethanolamine （MDEA）

and polytetramethylene oxide glycol （PTMO） werestudied with variable-temperature wide-line

H NMR. It is found that upon ionization

degree ofphase separation in the polymer system decreased at first due to the loss of hard segmentregularity

while further ionization increased the degree of phase separation through increasinghard phase cohesion and difference of polarity between hard and soft segments.

Abstract

Polyether-polyurethane zwitterionomers based on 4

4’-diphenylmethane diisocyanate（MDI）

methyl diethanolamine （MDEA）

and polytetramethylene oxide glycol （PTMO） werestudied with variable-temperature wide-line

H NMR. It is found that upon ionization

degree ofphase separation in the polymer system decreased at first due to the loss of hard segmentregularity

while further ionization increased the degree of phase separation through increasinghard phase cohesion and difference of polarity between hard and soft segments.

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