Inverse gas chromatography in the investigation of polymer surfaces:
acid-base and dispersive properties of polydimethacrylates
Polimery 1994, No 7-8, 464
The dispersive and acid-base properties of the surfaces of the crosslinked polymers were described by the dispersive component of the surface free energy Υsd and by the KA and KD parameters representing the ability of a given surface to interact, respectively, as electron acceptor or electron donor. The measurements were carried out for some model polymers obtained by photopolymerization of 2,2'-thiobisethanol dimethacrylate, 2,2'-oxybisethanol dimethacrylate, 1,5-pentanediol dimethacrylate and 1,4-butanediol dimethacrylate. It was found that KA,KD and Υsd parameters succesfully describe the changes in acid-base and dispersive properties of the polymer surface due to introduction of a heteroatom into ester group as well as to changes in polymer crosslinking density. KA and KDare also sensitive to substantial changes occuring on the polymer surface during annealing (3 h, 80 and 160°C, in He or air). These changes highly depend on the polymer type.
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