Characterising the degradation of the polymer slip additive erucamide in the presence of inorganic antiblock agents
| Autor: | Christopher W. Peloso, Stephen W. Bigger, John Scheirs, Michael J. O’Connor |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Optical absorbance Reaction mechanism Polymers and Plastics Inorganic chemistry Impurity effect Polymer Slip (materials science) Condensed Matter Physics Low-density polyethylene Silanol chemistry.chemical_compound chemistry Transition metal Mechanics of Materials Materials Chemistry |
| Zdroj: | Polymer Degradation and Stability. 62:285-290 |
| ISSN: | 0141-3910 |
| DOI: | 10.1016/s0141-3910(98)00009-3 |
| Popis: | The antagonism between five commercial grades of erucamide and seven commercial grades of inorganic antiblock agents used in LDPE film formulations is investigated. Mixtures of erucamide and antiblock agents were thermally aged in air at 90°C and the increase in discoloration of the mixtures was quantified by measuring the optical absorbance at 440 nm. The formation of coloured degradation products of erucamide appears to be autocatalytic and increases with increasing pH of the antiblock agent. The experimental results suggest impurities in commercial antiblock agents such as transition metal oxides and alkaline earth metal oxides as well as surface silanol groups in silica antiblocks play significant roles in the degradation of erucamide. A mechanism is proposed to account for the observed variation in the extent of antagonism exhibited by the different antiblock agents. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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