LC-Multistage Mass Spectrometry for the Characterization of Poly(Butylene Adipate-co-Butylene Terephthalate) Copolyester

Abstract

A comprehensive study using liquid chromatography electrospray ionization multistage mass spectrometry (LC-ESI MS n ) was performed to get detailed structural information on poly(butylene adipate-co-butylene terephthalate) co-polyester and its product of partial degradation. LC-MS and LC-MS n identified the existence of cyclic structures in the original samples that disappear completely during the degradation. The occurrence of methanol transesterification in the degradation process was confirmed. MS 2 on the first 13 C isotope peak helped to determine the elemental composition of the fragments and facilitated end group determination. The method can be used to provide an alternative for high mass accuracy MS 2 experiments. Sequence information was also revealed for certain copolymeric structures.

Release of quercetin from micellar nanoparticles with saturated and unsaturated core forming polyesters — A combined computational and experimental study

“…Therefore, based on the different available cations in the ESI-MS (H + = 1 g/mol, Na + = 23 g/mol, K + = 39 g/mol and NH 4 + = 18 g/mol) the molecular weight of the potential degradation products can be calculated as a combination of different molecular structures derived from repeating units together with at least one of the abovementioned positive ions. As it was emphasized before [29] and further observed here (Tables S3-S4 in SI file), some of the m/z values detected corresponded to the linear fragments of the repeating units with two cations (such as m/z = 181.1 corresponds to (a .− )(NH 4 + ) 2 in the PBA degradation mass spectra) and others were related to the cyclic oligomer structures.…”

Effect of composting plant material with copolyester on quality of organic matter

“…The air more saturated with vapour favours copolyester breakdown. Song et al [13] claim that, based on the analyses of BTA (aliphatic-aromatic copolyester of terephthalate adypine acid and 1,4-butylene), partially broken down at 35 and 75ºC, the temperature affects the degree, but not the character of degradation. However, the extent of disintegration is also important, because it facilitates mechanical crushing when mixing the compost prism.…”

Mass spectrometry for the elucidation of the subtle molecular structure of biodegradable polymers and their degradation products

“…The ESI‐MS was used in ecotoxicological studies of polyester blends containing atactic poly(3‐hydroxybutyrate) as well as poly[(1,4‐ butylene terephthalate)‐co‐(1,4‐butylene adipate)] (Ecoflex, BTA) (Rychter et al, ; Rychter et al, ). Regarding this latter polymer, LC–ESI‐MS n analysis was also performed in order to get detailed information on its structure through an analysis of the products of partial degradation under alkaline conditions (Song et al, ).…”