Mass Spectrometry of Step-Growth Polymers

Klee, Joachim E.

doi:10.1255/ejms.780

Cited by 23 publications

(13 citation statements)

References 124 publications

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“…Conversely, the actual internal energy of analyte ions is expected to be lowered by the matrix shielding either during the desorption or in the expanding plume. Furthermore, ions undergo some cooling because of collision and adiabatic gas expansion . Thus, compared to the dynamics of the ions during MALDI‐TOF analysis, the dissociation occurs at a sufficiently low time‐scale that at least a certain fraction of the complexes survive the solution‐to‐gas phase transition.…”

Section: Resultsmentioning

confidence: 99%

Mass spectrometric analysis of in vitro nuclear aggregates of polyamines

Picariello

Iacomino

Luccia

et al. 2014

Rapid Commun. Mass Spectrom.

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Section: Resultsmentioning

confidence: 99%

Mass spectrometric analysis of in vitro nuclear aggregates of polyamines

Picariello

Iacomino

Luccia

et al. 2014

Rapid Commun. Mass Spectrom.

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“…[1][2][3] The ability of MALDI TOF MS to monitor the molecular-weight distribution of synthetic polymer samples makes the technique useful for identifying the chemical composition and end-functional groups of polymer samples. [4][5][6] MS techniques have been mainly applied to the investigation of polymer segments, prepared by the hydrolysis of high-molecular-weight polymers.…”

Section: Introductionmentioning

confidence: 99%

Reaction Monitoring of Toluenediisocyanate (TDI) Polymerization on a Non-Mixable Aqueous Surface by MALDI Mass Spectrometry

Ahn

Kim

2013

ANAL. SCI.

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The polymerization reaction of toluene diisocyanate (TDI) and hydroxyl compounds has been widely used for the production of polyurea resins. Since the composition and molecular-weight distribution of polymer adducts greatly influence the final properties of the resuting polymer, the development of analytical tools capable of monitoring the polyaddition reactions is important to control them as well as the properties of the resuting polymer. Here we report that matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI TOF MS) is useful to precisely monitor time-dependent dynamic events occurring in the polymerization reaction of TDI with water. For this purpose, the polymerization reactions were conducted in two different reaction systems, continuously supplying sufficient water and depleting water after an initial exposure of water to provide an anhydrous storage condition of prepolymer adducts. Samples prepared in a time course from the two different reaction systems were analyzed by a MALDI TOF mass spectrometer. The polymerization adducts of TDI and water were monitored and showed to consist of three structural types of polymer adduct series, including diisocyanate, monoamino, and diamino series. These MALDI mass data efficiently reflected changes in the reaction conditions of each TDI polymerization reaction, thereby providing precise information at the molecular level for time-dependent events occurring during the polymerization reaction. These events included changes between the polymer adduct series and in the molecular-weight distribution of each polymer adduct series. The results obtained in this study suggest that high-throughput MALDI MS-based dynamic monitoring of polymerization can be used to precisely control the polymerization reaction as well as to rapidly monitor the state of prepolymers in storage.

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“…Matrix assisted laser desorption ionization (MALDI) mass spectrometry can provide molecular weight distributions of polymers up to 1.5 million Da. However, this can only be used for polymers with narrow polydispersity [2][3][4]. Electrospray ionization (ESI) mass spectrometry can be utilized to determine molecular weight distributions but this technique suffers from the need to dissolve the polymer in a suitable solvent [2].…”

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Time of flight secondary ion mass spectrometric determination of molecular weight distributions of low polydispersity poly(dimethyl siloxane) with polyatomic primary ions

Wells

Moon

Gardella

2009

J. Am. Soc. Mass Spectrom.

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This work reports a comparison of oligomer and fragment ion intensities resulting from primary ion bombardment with several primary ion sources (Bi n ϩ , C 60 ϩ , and Cs ϩ ) at various energies in secondary ion mass spectrometry (SIMS). Although the use of polyatomic primary ions are of great interest due to increased secondary ion efficiency and yield, we demonstrate that monatomic primary ions result in increased oligomer ion yield for polymers prepared as submonolayer films on silver substrates. The enhancement of oligomer secondary ion yield with monatomic ions is evidence that monatomic primary ions have a shallower sampling depth than polyatomic ions, resulting from a collision cascade that is less energetic at the sample surface. The results are also consistent with a lower degree of fragmentation of the resultant secondary ions, which is observed when evaluating the fragmentation data and the spectral data. (J Am Soc Mass Spectrom 2009, 20, 1562-1566

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Mass Spectrometry of Step-Growth Polymers

Cited by 23 publications

References 124 publications

Mass spectrometric analysis of in vitro nuclear aggregates of polyamines

Mass spectrometric analysis of in vitro nuclear aggregates of polyamines

Reaction Monitoring of Toluenediisocyanate (TDI) Polymerization on a Non-Mixable Aqueous Surface by MALDI Mass Spectrometry

Time of flight secondary ion mass spectrometric determination of molecular weight distributions of low polydispersity poly(dimethyl siloxane) with polyatomic primary ions

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