Differential scanning calorimetry (DSC) was used for the determination of decomposition rate constants, activation energies, and reaction enthalpies of different monomeric azo compounds. In all cases, except for 2-arylazo-2-nitropropanes the decomposition was found to follow first order kinetics. The amount of azo-groups in polymeric azo compounds and their decomposition kinetics were determined by this method.

Azogruppen enthaltende Polycarbonate wurden als Initiatoren zur Herstellung von Pfropfcopolymeren aus unterschiedlichen Vinylmonomeren eingesetzt. Die Zusammensetzung der Pfropfcopolymeren wurde gravimetrisch sowie durch Elementaranalyse, IR‐ und 1H NMR‐Spektroskopie bestimmt. Die Länge der Seitenketten wurde nach Hydrolyse des Polycarbonatrückgrates gemessen.

Polycarbonate 3 was synthesized by copolymerisation of 4-(p-hydroxyphenylisopropyl)phenol with [3,5-Bis(hydroxymethyl)phenylazo]-methylmalonodinitrile (2a). This azo groups containing polycarbonate was employed as initiator for graft copolymerisations. The content of azo functions in the resulting copolymers was determined by 'H NMR, microanalysis, and DSC-measurements, and R.by vapor pressure osmometry. Grafting was carried out with styrene in 1,4-dioxane and the resulting products were characterized by IR, 'H NMR, HPLC, and vapor pressure osmometry.

No abstract