Compositional analysis of the high molecular weight ethylene oxide propylene oxide copolymer by MALDI mass spectrometry
by Houshia, Orwa Jaber; Wilkins, Charles
The compn. of narrow distribution poly ethylene oxide-propylene oxide copolymer (Mw ~ 8700 Da) was studied using matrix assisted laser desorption ionization (MALDI) mass spectrometry. The ethylene oxide-propylene oxide copolymer produced oligomers sepd. by 14 Da. The av. resolving power over the entire spectrum was 28,000. Approx. 448 isotopically resolved peaks representing about 56 oligomers are identified. Although agreement between exptl. and calcd. isotopic distributions was strong, the compositional assignment was difficult. This is due to the large no. of possible isobaric components. The purpose of this research is to resolve and study the compn. of high mass copolymer such as ethylene oxide-propylene oxide.
- Journal
- International Journal of Chemistry
- Volume
- 4
- Issue
- 3
- Year
- 2012
- Start Page
- 14-23
- URL
- https://dx.doi.org/10.5539/ijc.v4n3p14
- ISBN/ISSN
- 1916-9701; 1916-9698
- DOI
- 10.5539/ijc.v4n3p14