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Synthesis and matrix‐assisted laser desorption/ionization time‐of‐flight characterization of bisphenol‐A copolyformals containing nickel(II)/Schiff base, eicosane and 2‐butene units in the main chain
Author(s) -
Vitalini Daniele,
Spina Emanuela,
Rapisardi Roberto,
Scamporrino Emilio,
Mineo Placido
Publication year - 2006
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.2657
Subject(s) - chemistry , polymer chemistry , copolymer , differential scanning calorimetry , mass spectrometry , gel permeation chromatography , thermogravimetry , glass transition , schiff base , matrix assisted laser desorption/ionization , polymer , desorption , chromatography , organic chemistry , inorganic chemistry , physics , adsorption , thermodynamics
Some bisphenol‐A copolyformals, containing in the main chain different amounts of a Ni‐diimine nonlinear optical (NLO)‐chromophore, eicosane and/or 2‐butene units, were synthesized by condensation reaction between dibromomethane and suitable mixtures of Ni(II)/Schiff base complex, 1,20‐di(bisphenol‐A)ether‐eicosane and/or 1,4‐di(bisphenol‐A)ether‐2‐butene. Structural composition and thermal properties of polymeric materials were inferred by analyses by matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOFMS), nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and thermogravimetry (TG). MALDI‐TOF data show that both Ni‐diimine and unsaturated units are present in the copolyformals with a homogeneous arrangement in all the polymer mass range (GPC data). It has also been ascertained that the glass transition temperature (Tg) of the copolymers changes as a consequence of the abundance of aliphatic units in the macromolecules (DSC data). Cross‐linking experiments of the copolymer at temperatures near the Tg value and under UV irradiation were also performed. Copyright © 2006 John Wiley & Sons, Ltd.