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添加三聚氰胺焦磷酸盐和次磷酸铝的竹纤维增强聚丙烯复合材料的阻燃性能及力学性能研究

Investigation of the Flame-Retardant and Mechanical Properties of Bamboo Fiber-Reinforced Polypropylene Composites with Melamine Pyrophosphate and Aluminum Hypophosphite Addition.

作者信息

Fang Lu, Lu Xizhen, Zeng Jian, Chen Yingyi, Tang Qiheng

机构信息

Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.

College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China.

出版信息

Materials (Basel). 2020 Jan 19;13(2):479. doi: 10.3390/ma13020479.

DOI:10.3390/ma13020479
PMID:31963882
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7014439/
Abstract

To improve the flame-retardant performance of bamboo fiber (BF) reinforced polypropylene (PP) composites, melamine pyrophosphate (MPP) and aluminum hypophosphite (AP) at a constant mass ratio of 2:1 were added. The influence of the MPP/AP mass fraction on the mechanical and flame-retardant properties of the BF reinforced PP composites were evaluated by mechanical testing, limiting oxygen index (LOI) and cone calorimetry. Mechanical tests demonstrate that tensile properties of BF/PP decreased with the increase of MPP/AP mass fraction, while flexural properties of composites exhibited very different tendencies. Both flexural strength and modulus increased slightly with the addition of MPP/AP at first, and then decreased significantly after a relatively high content of MPP/AP was loaded. This was due to the poor interfacial compatibility between PP and MPP/AP. The flame retardancy of BF/PP composites has been greatly improved. When 30% MPP/AP was loaded into the composites, the LOI increased to 27.2%, which was 42.4% higher than that of the composite without flame retardant addition. Cone calorimetry results indicated that MPP/AP worked in both gas and condensed phases during the combustion process. Peak heat release rate, total smoke production and mass loss of the composites were significantly reduced because of the addition of MPP/AP.

摘要

为提高竹纤维（BF）增强聚丙烯（PP）复合材料的阻燃性能，添加了质量比恒定为2:1的三聚氰胺焦磷酸盐（MPP）和次磷酸铝（AP）。通过力学测试、极限氧指数（LOI）和锥形量热法评估了MPP/AP质量分数对BF增强PP复合材料力学性能和阻燃性能的影响。力学测试表明，BF/PP的拉伸性能随MPP/AP质量分数的增加而降低，而复合材料的弯曲性能表现出非常不同的趋势。起初，随着MPP/AP的添加，弯曲强度和模量均略有增加，而在加载相对较高含量的MPP/AP后则显著下降。这是由于PP与MPP/AP之间的界面相容性较差。BF/PP复合材料的阻燃性得到了极大提高。当向复合材料中加入30%的MPP/AP时，LOI提高到27.2%，比未添加阻燃剂的复合材料高出42.4%。锥形量热法结果表明，MPP/AP在燃烧过程中在气相和凝聚相中均起作用。由于添加了MPP/AP，复合材料的热释放速率峰值、总产烟量和质量损失均显著降低。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1110/7014439/ea54d6b8240f/materials-13-00479-g010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1110/7014439/ea54d6b8240f/materials-13-00479-g010.jpg
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