Flame retardancy effect of surface-modified metal hydroxides on linear low density polyethylene
| Autor: | Xiangjian Kong, Jian-qing Zhao, Shu-mei Liu |
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| Rok vydání: | 2008 |
| Předmět: |
Thermogravimetric analysis
Materials science Metal hydroxide Mechanical Engineering chemistry.chemical_element Diphenylsilanediol Linear low-density polyethylene chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Cone calorimeter Hydroxide General Materials Science Composite material Boron Mass fraction |
| Zdroj: | Journal of Central South University of Technology. 15:779-785 |
| ISSN: | 1993-0666 1005-9784 |
| Popis: | Metal hydroxides (MAH) consisting of magnesium hydroxide and aluminum hydroxide with a mass ratio of 1:2 were surface-modified by γ-diethoxyphosphorous ester propyldiethoxymethylsilane, boric acid and diphenylsilanediol in xylene under dibutyl tin dilaurate catalyst at 140 °C. Phosphorus, silicon and boron elements covalently bonded to metal hydroxide particles were detected by X-ray photoelectron spectroscopy. The degradation behavior of the surface-modified MAH was characterized by thermogravimetric analysis. The results show that linear low density polyethylene (LLDPE) composite, filled with 50% (mass fraction) of MAH modified by 5.0% (mass fraction) of modifiers, passes the V-0 rating of UL-94 test and shows the limited oxygen index of 34%, and its heat release rate and average effective heat combustion in a cone calorimeter measurement decrease obviously; The mechanical properties of MAH can be improved by surface-modification. The uniform dispersion of particles and strong interfacial bonding between particles and matrix are obtained. |
| Databáze: | OpenAIRE |
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