Surfactant modified zinc borate synthesis and its effect on the properties of PET
Surfactant modified zinc borate synthesis and its effect on the properties of PET
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DOI：
10.1016/j.powtec.2013.04.006
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发表时间：
2013-08
影响因子：
5.2
通讯作者：
Berk Baltaci;Gaye Ö. Çakal;G. Bayram;I. Eroglu;S. Özkar
中科院分区：
文献类型：
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作者：
Berk Baltaci;Gaye Ö. Çakal;G. Bayram;I. Eroglu;S. Özkar
硼酸锌由氧化锌和硼酸在不存在或存在枯烯封端的聚（苯乙烯-co-马来酸酐）PSMA的情况下反应制备，PSMA作为表面活性剂以不同浓度（0.1- 1 wt.%）添加的水）加入反应介质中，以研究其对反应期间颗粒的生长和附聚的影响。通过X射线衍射（XRD）、扫描电镜（SEM）和热重分析（TGA）对合成的硼酸锌进行了表征，并与未改性的硼酸锌进行了比较。结果表明，硼酸锌（分子式为2 ZnO·3B 2 O3·3 H2O）以不规则片状结构存在。该产品保持其水合水高达300°C。表面改性硼酸锌与磷酸硼一起也用作聚对苯二甲酸乙二醇酯（PET）的阻燃剂。通过极限氧指数（LOI）测试来测定复合材料的阻燃性能。还测量了火灾过程中烟雾的透光率。加入3%的磷酸硼和2%的PSMA改性硼酸锌，复合材料的LOI值由纯PET的22.5%提高到26%。相同PET基复合材料的冲击强度从纯PET的9.6kJ/m2提高到11.4kJ/m2。
Zinc borate was prepared from the reaction of zinc oxide and boric acid in the absence or presence of cumene terminated poly(styrene-co-maleic anhydride), PSMA, added as a surfactant at varying concentrations (0.1–1wt.% of water) to the reaction medium to investigate its effect on the growth and agglomeration of particles during reaction. Synthesized zinc borates were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) in comparison to unmodified zinc borate. The results revealed that zinc borate (molecular formula 2ZnO·3B2O3·3H2O) formed as irregular platelets. The product retained its hydration water up to 300°C. Surface modified zinc borates, together with boron phosphate, were also employed as a flame retardant for poly(ethylene terephthalate), PET. The flame retardancy of the composites was determined by the limiting oxygen index (LOI) test. Smoke emission during fire, in terms of light transmittance, was also measured. The addition of 3% boron phosphate and 2% PSMA modified zinc borate increased the LOI value of composite materials to 26% from 22.5% of neat PET. Impact strength for the same PET based composite was increased to 11.4kJ/m2from 9.6kJ/m2of neat PET.