聚磷酸铵改性方式对热塑性聚氨酯弹性体性能影响
孙哲123，陈雅君123，钱立军123
1. 北京工商大学化学与材料工程学院，北京 100048； 2. 中国轻工业先进阻燃剂工程技术研究中心，北京 100048； 3. 石油和化工行业高分子材料无卤阻燃剂工程实验室，北京 100048
Enhance Flame Retardant and Mechanical Properties of Thermoplastic Polyurethane Elastomer with Modified Ammonium Polyphosphate by Wet Ball Milling
Sun Zhe123, Chen Yajun123, Qian Lijun123
1. College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China; 2. China Light Industry Advanced Flame Retardant Engineering Technology Research Center,Beijing 100048,China; 3. Petroleum and Chemical Industry Engineering Laboratory of Non-halogen Flame Retardants for Polymers,Beijing 100048,China
摘要：为了得到同时具有良好阻燃性能和力学性能的热塑性聚氨酯弹性体复合材料，首先通过在湿法球磨过程中引入 3-氨基丙基三乙氧基硅烷(KH550) 制备了改性聚磷酸铵(WMAAPP)，同时将单独湿法球磨改性的聚磷酸铵(WMAPP)和溶液法引入 KH550 改性的聚磷酸铵(MAAPP)作为对比样品，分别将上述三种改性的聚磷酸铵以 5% 的含量添加到热塑性聚氨酯弹性体 (TPU)中 ，通过极限氧指数(LOI)测试 、UL 94 垂直燃烧测试、锥形量热测试以及拉伸性能测试研究其在阻燃性能和力学性能方面的区别。结果表明，TPU/WMAAPP 具有最高的 LOI 值为 28.9%，并且在锥量测试中其热释放速率峰值 (pk-HRR)、总热释放量和总烟释放量是所有改性聚磷酸铵(APP)样品中最低的 ，分别为309 kW/m2，68 MJ/m2，1 393 m2/m2。 值得注意的是 ，仅添加 5%WMAAPP 的 TPU 比添加 7.5% APP 的 TPU 的 pk-HRR还要低。在拉伸测试中，TPU/WMAAPP 的拉伸强度和断裂伸长率较 TPU/APP 均有所提高。研究结果表明，与其他的改性方式相比，在湿法球磨过程中引入 KH550 制备的改性聚磷酸铵可以使阻燃 TPU 复合材料具有更好的阻燃性能以及拉伸性能。
Abstract：In order to prepare thermoplastic polyurethane elastomer composites with good flame retardancy and mechanical properties at the same time, modified ammonium polyphosphate (WMAAPP) was prepared by introducing 3-aminopropyltriethoxysilane (KH550) in the wet ball milling process, was compared with the modified ammonium polyphosphate (WMAPP) only by wet ball milling and the modified ammonium polyphosphate (MAAPP) by introducing KH550 during solution method. The three modified ammonium polyphosphates were added to thermoplastic polyurethane elastomers (TPU) at a content of 5%, and the limiting oxygen index (LOI) test, UL 94 vertical burning test, cone calorimetry test and tensile test were used to study the differences of flame retardancy and mechanical properties of the TPU composites. The results showed that TPU/WMAAPP had the highest LOI value of 28.9%, and its peak heat release rate (pk-HRR), total heat release rate (THR) and total smoke release (TSR) were the lowest among all the modified ammonium polyphosphate (APP) samples in the cone calorimetry test, which were 309 kW/m2, 68 MJ/m2 and 1 393 m2/m2, respectively. It is worth noting that the pk-HRR of TPU with only 5% WMAAPP is lower than that of TPU with 7.5% APP. In the tensile test, the tensile strength and elongation at break of TPU/WMAAPP were improved compared with TPU/APP. The results showed that compared with other modification methods, the modified ammonium polyphosphate prepared by introducing KH550 in the wet milling process could exert the flame retardant TPU composites better flame retardant performances and tensile properties.
关键词：湿法球磨；聚磷酸铵；阻燃；热塑性聚氨酯弹性体
Keywords：wet ball milling; ammonium polyphosphate; flame retardant; thermoplastic polyurethane elastomer
基金：国家自然科学基金项目(22175006，51973006)
本文引用格式：
孙哲，陈雅君，钱立军.聚磷酸铵改性方式对热塑性聚氨酯弹性体性能影响[J].工程塑料应用，2023，51(4)：125?132.
Sun Zhe，Chen Yajun，Qian Lijun. Enhance flame retardant and mechanical properties of thermoplastic polyurethane elastomer with modifiedammonium polyphosphate by wet ball milling[J]. Engineering Plastics Application，2023，51(4)：125?132.
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