聚乙烯用阻燃剂及其复配体系的研究进展

综述了国内外聚乙烯用阻燃剂及其复配体系的研究进展,对无卤阻燃剂作了较为详细的介绍,最后对聚乙烯用阻燃剂今后的发展趋势作了简单的分析。     

超细掺锑SnO2制备工艺中前驱体洗涤分离的研究

Sb-doped SnO₂ ultrafine powders were prepared via oxidation-coprecipitation. Also the relation between surface characteristic (i.e. charged status and solvation) and precursor separation was studied. The results showed that the filter washing speed of precursor can be improved by reduced Precursor |ζ| values or lessen Precursor solvation. For example, adding to little organic solvents (such as ethanol )in Washing liquid morely accelerates to separation speed of precursor. This method and principle of washing and separation precursor can be used by other nona powders preparation with precipitation method, also sb doped SnO₂ ultrafine powders will be prepared easily in industry with it.