| Autor: |
J. C. Randall, J. Preston, W. B. Black, R. W. Morrison |
| Rok vydání: |
1973 |
| Předmět: |
|
| Zdroj: |
Journal of Macromolecular Science: Part A - Chemistry. 7:99-118 |
| ISSN: |
0022-233X |
| DOI: |
10.1080/00222337308061133 |
| Popis: |
The problem of chemical order of polyamide-hydrazides prepared from terephthaloyl chloride with an unsymmetrical monomer, p-aminobenzhydrazide, is discussed. An NMR method for identifying the molecular structure of species formed in the early stages of poly condensation has enabled the course of a polymerization to be followed during this time and the final degree of order to be predicted qualitatively. These studies have provided a demonstration that the structure of these polymers can be controlled to a significant degree by appropriate variations in experimental conditions. But even under the most adverse conditions usually employed, poly amide-hydrazides are found to be at least “partially ordered” copolymers. The techniques developed for this study may find application in the study of other polymer forming reactions with monomers having two functional groups with dissimilar reactivities. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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