2,6-Dimethylphenol polymerization with cuprous chloride and n-butylamine catalyst system: Effect of Nal addition
✍ Scribed by Kuo-Tseng Li; I-Tien Tsai
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 508 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0887-624X
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✦ Synopsis
SYNOPSIS
8,6-Dimethylphenol polymerization with catalyst systems based on CuClln-butylamine were studied under 10 kg/cm2 pure oxygen pressure. By addition of sodium iodide, the catalyst performance was dramatically improved and an unusual long induction period was observed. Both the polymer intrinsic viscosity obtained and the induction period increased significantly with the increase of NaI concentration. However, the induction period decreased rapidly with the increase of n-butylamine concentration. UV-VIS absorption spectra showed that the CuClln-butylamine complex was converted to CuI/n-butylamine complex after the addition of NaI. The hydration rate of copper halideln-butylamine complex decreased significantly with the increase of NaI and n-butylamine concentrations. Therefore the increase of polymer intrinsic viscosity and induction period by NaI addition suggest that the polymerization catalyst became more hydrolytically stable and less active at the higher NaI concentration. 0 1996 John Wiley & Sons, Inc.