A DSC study of curative interactions. III. The interaction of TMTM with ZnO, sulfur, and stearic acid
| Autor: | F. W. H. Kruger, W. J. McGill |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
inorganic chemicals
Polymers and Plastics Inorganic chemistry Vulcanization chemistry.chemical_element General Chemistry Sulfur Decomposition Surfaces Coatings and Films law.invention chemistry.chemical_compound Differential scanning calorimetry chemistry Natural rubber law Ternary eutectic visual_art Polymer chemistry Tetramethylthiuram disulphide Materials Chemistry visual_art.visual_art_medium Stearic acid |
| Zdroj: | Journal of Applied Polymer Science. 42:2661-2667 |
| ISSN: | 1097-4628 0021-8995 |
| DOI: | 10.1002/app.1991.070421004 |
| Popis: | The interaction among various combinations of sulfur, tetramethylthiuram monosulphide (TMTM), ZnO, and stearic acid were studied by differential scanning calorimetry in the absence of rubber. Sulfur and TMTM reacted to form tetramethylthiuram disulphide, and the ternary eutectic mixture melted at about 80°C. The absence of the Sγ Sμ transition in sulfur/TMTM mixes was related to a sulfur/TMTM interaction, wherein the eightmembered sulfur rings were opened at temperatures well below 170°C. The interaction of stearic acid with TMTM led to the decomposition of TMTM, but the reaction was largely suppressed when both ZnO and sulfur were present in the mixture. No evidence was found for the formation of a zinc-accelerator complex of the type normally attributed a role in the accelerated sulfur vulcanization. |
| Databáze: | OpenAIRE |
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