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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of hybrid silicon materials microcapsulated ammonium polyphosphate and its application in thermoplastic polyurethane
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Preparation of hybrid silicon materials microcapsulated ammonium polyphosphate and its application in thermoplastic polyurethane

机译：混合硅材料微胶囊铵多磷酸盐的制备及其在热塑性聚氨酯中的应用

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摘要

Silica-gel microencapsulated ammonium polyphosphate (SiOAPP), prepared by traditional sol-gel method, is still incompatible with polymer and easily attacked by moisture due to the presence of lots of hydroxyl group, so the traditional sol-gel method was optimized with polydimethyl siloxane (PDMS) to improve the related properties of microcapsules in this study. The results showed that the SiOAPP process and shell shape had changed significantly, and the APP microcapsules with silica/silicone carbon composite shell (SiOCAPP) was successfully prepared. The hydrophobicity of SiOCAPP was much better than that of the SiOAPP, the water contact angle of SiOAPP was 54 degrees, while the water contact angle of SiOCAPP could reach 111 degrees. The property reinforcements of the SiOCAPP in thermoplastic polyurethane (TPU) were studied and compared with the TPU/SiOAPP composites. The time to ignition reduced by 2 s and the maximal peak of heat release rate (pk-HRR) increased by 4.4%, but the average heat release rate and total heat release, respectively, reduced by 15.5% and 31.4%, which was a great improvement on the flame retardancy of TPU, and the char residue rate, which is related to the condensed flame retardant effect, increased by 10%. Besides, the tensile strength and elongation at break increased by 11.8% and 5.84%, respectively. Generally, the sol-gel method modified by PDMS provided an novel method to improve the comprehensive properties of APP. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45742.
机译：通过传统的溶胶方法制备的二氧化硅 - 凝胶微磷酸铵（SiOApp）与聚合物仍然不相容，并且由于许多羟基的存在而容易被水分攻击，因此用聚二甲基硅氧烷优化了传统的溶胶方法（PDMS）改善本研究中微胶囊的相关性质。结果表明，SiOApp工艺和壳体形状显着变化，并成功制备了具有二氧化硅/硅铝碳复合壳（Siocapp）的APP微胶囊。 Siocapp的疏水性比SiOApp的疏水性好多，SiOApp的水接触角为54度，而Siocapp的水接触角可以达到111度。研究了热塑性聚氨酯（TPU）中Siocapp的性质增强，并与TPU / SiOApp复合材料进行了比较。点燃减少2 s的时间和热释放速率的最大峰值（PK-HRR）增加了4.4％，但平均热释放速率和总热释放分别减少15.5％和31.4％，这是一个对TPU的阻燃性的巨大改善以及与浓缩阻燃效应有关的炭渣率增加了10％。此外，抗拉强度和断裂伸长率分别增加11.8％和5.84％。通常，PDMS修改的溶胶 - 凝胶方法提供了一种新的方法来改善应用的综合性质。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45742。

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