求翻译：本论文的主要内容是用自制无卤、低烟、低毒的膨胀型阻燃剂MPOP阻燃聚丙烯，另外还对MPOP进行了共混改性，主要是与TPP进行复配，添加到聚丙烯中后研究复合材料的力学性能和燃烧性能。通过极限氧指数（LOI）测试、垂直燃烧测试、热重分析和锥形量热分析，结果表明与纯PP相比，MPOP与TPP加入PP后改善了PP的燃烧性能，极限氧指数从17.8提高到了19.9，同时并没有明显地影响聚丙烯的加工性能和破坏聚丙烯的物理、机械性能。是什么意思？

The main content of this paper with homemade halogen-free, low smoke, low toxicity of the intumescent flame retardant mpop flame retardant polypropylene, also mpop modification, and the tpp complex, added to the poly propylene to study the mechanical properties and combustion properties of the compo

This paper is the main content with home-made non-halogen, low smoke, low-inflation-flame-retardant MPOP flame-retardant polypropylene, and also to make a total of mixed MPOP living modified organisms, mainly with TPP, and add to the Polypropylene composites, mechanical properties and combustion per

The main contents of this paper are made of halogen-free, low smoke, low toxicity MPOP flame retardant intumescent flame retardant polypropylene, also MPOP is a blend of modified, primarily mixed with the TPP, added to polypropylene study on mechanical performance and combustion properties of compos