## Abstract Der thermische Zerfall der unsymmetrischen Arylazomalodinitrile __p__‐Methoxyphenylazomethylmalonsäuredinitril (I) und 2,6‐Dimethylphenylazomethylmalonsäuredinitril (II) erfolgt nach 1. Ordnung. Geschwindigkeitskonstanten für den Zerfall bei verschiedenen Temperaturen sowie in verschied
Über die Eigenschaften einiger wasserlöslicher Azo-Initiatoren
✍ Scribed by Nuyken, Oskar ;Kerber, Robert
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1978
- Weight
- 503 KB
- Volume
- 179
- Category
- Article
- ISSN
- 0025-116X
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✦ Synopsis
Abstract
Water soluble azo compounds of the structure 1a, b, 2a, b, 3, 4, and 5 decompose, depending on the substitution of the aromatic ring, in water already at room temperature. Therefore, they are useful initiators for solution and emulsion polymerisations in this temperature region. Reactions competing with thermolysis, as the formation of a hydrazone (pH>8) and ionic reactions with suitable reagents (phenols) are described.
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## Abstract (3‐Vinylphenylazo)‐methylmalonodinitrile (**2**) was copolymerized with styrene up to high conversion giving no remarkable change in the monomer composition. The reactions were carried out in emulsion at 5°C, in bulk at 50°C, and in solution at 60°C. The azo compound displays not only t