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- W2316777865 endingPage "9790" @default.
- W2316777865 startingPage "9779" @default.
- W2316777865 abstract "The focus of the current study is the development of chromatographic methods to understand the end-group modification of poly(ε-caprolactones) (pCLs) prepared via azide/alkyne “click” chemistry. In order to prove the efficiency of the “click” reaction with increasing molar mass of the pCLs, a detailed characterization method via several multidimensional chromatographic techniques (2D LC/SEC, coupled to mass spectrometry) was developed. In particular, we have investigated the separation of low molar mass pCLs (Mn ≤ 35 000 g·mol–1) using a gradient elution chromatographic method (eluent: ACN/THF) monitoring the end-group functionalization of the separated polymers online via ESI-TOF and/or MALDI-TOF mass spectrometry, the latter coupled via a transfer module sprayer (TM sprayer). Because of the poor solubility of high molar mass pCLs (Mn above 35 000 g·mol–1), a second chromatographic method was employed, enabling the separation of end-group-functionalized pCLs up to a molar mass of 115 400 g·mol–1. Based on the critical solution conditions of the polymers, different solvent compositions and chromatographic columns were investigated in an isocratic mode to determine the critical conditions of α,ω-dihydroxy-telechelic pCLs. Finally, the critical conditions were optimized on a silica gel modified aminopropyl column (NUC-NH2) using a solvent mixture ratio of DCM/THF of 92/8 at 35 °C. A combination of the developed LCCC methods with SEC revealed the chemical composition as well as the molar mass of all of the modified pCLs, from the low molar mass polymers up to Mn = 115 400 g·mol–1." @default.
- W2316777865 created "2016-06-24" @default.
- W2316777865 creator A5040881117 @default.
- W2316777865 creator A5048097455 @default.
- W2316777865 creator A5052969855 @default.
- W2316777865 creator A5064611725 @default.
- W2316777865 creator A5079748849 @default.
- W2316777865 date "2012-11-30" @default.
- W2316777865 modified "2023-10-10" @default.
- W2316777865 title "Multidimensional Characterization of α,ω-Telechelic Poly(ε-caprolactone)s via Online Coupling of 2D Chromatographic Methods (LC/SEC) and ESI-TOF/MALDI-TOF-MS" @default.
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- W2316777865 doi "https://doi.org/10.1021/ma3016739" @default.