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JKMRS Volume 20, No 1, pp 7; Quantitative NMR Analysis of PTME...
2016년 03월 19일 / 조회수: 594

Quantitative NMR Analysis of PTMEG compounds

 

 

Gilhoon Kim, Hoshik Won*

 

 

Department of Applied Chemistry, Hanyang University, 55, Hanyang Daehak-Ro, Sangrok-Gu,

Ansan 426-791, Korea

 

  

Received Jan 12, 2016; Revised Feb 15, 2016; Accepted Feb 19, 2016

 

Abstract

 

PTMEG(Polytetramethylene ether glycol) is a polymer compound widely used as a wide range of applications in the textile industry. PTMEG sub-stance carrying various 1,800~2,000 molecular weight are mainly used as the raw material of the spandex production.
Molecular weight and degree of polymerization value for 4 different PTMEG samples under pilot plant scale synthetic process were determined by a new quantitative NMR method. In NMR experiments, p-toluenesulfonic acid(TSOH) was used for external standard material of PTMEG quantitative analysis. were measuring The con-centration of the primary standard TSOH was measured by UV/Vis spectroscopy. By using NMR peak assignments and the integral values of designated proton NMR peaks, We were able to measure the % composition of the synthetic PTMEG polymers, concentrations, molecular weight and the degree of polymerization that show the synthetic process of each manufacturing pilot plant.  By utilizing a newly developed quantitative NMR method were able to obtain the molecular weight of PTMEG samples within 0.08 error % range.

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