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采用溶液共混法将碱式硫酸镁晶须(MOSw)与聚丙烯(PP)进行共混,经过降温沉淀、抽滤洗涤及真空干燥等过程制备了一系列不同含量的聚丙烯/碱式硫酸镁晶须(PP/MOSw)复合材料。通过水平燃烧试验、锥形量热等测试手段考察了PP/MOSw复合材料的阻燃性能,结果表明,MOSw的加入对PP树脂有良好的阻燃效果。随着MOSw添加量的增大,其阻燃效果呈先升高后降低的趋势,添加量为10%时阻燃效果最好。此外,通过热重、残炭照片分析以及Raman光谱等手段研究了MOSw阻燃PP基体的机理,结果表明,MOSw的加入不仅提高了PP的热稳定性,同时使燃烧残炭层更加完整,从而表现出更好的阻燃性能。 相似文献
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Single crystalline calcium chloroborate(Ca_2B_5O_9Cl) whiskers with uniform diameter have been fabricated by a two-step process. The precursor was firstly prepared by the sedimentation reaction between CaCl_2, H_3BO_3 and Na OH aqueous solutions, and then sintered at different temperatures for 6 h with KCl as flux. The XRD indicates that the product synthesized at 600 °C is Orthorhombic Ca_2B_5O_9Cl. SEM and TEM results show that the Ca_2B_5O_9Cl is whisker with the diameter about 0.2-0.5 μm and the length up to 15 μm. SAED analysis shows that the whisker is single crystalline and grows along [001] direction. The possible formation process and growth mechanism were proposed. 相似文献
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