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三聚氰胺多聚磷酸盐(MPOP)阻燃聚丙烯(PP)。另外还对MPOP进行了共混改性，主要是与磷酸三苯酯(TPP)进行复配，添加到PP中后研究其复合材料的力学性能和阻燃性能。通过热重分析(TG)、极限氧指数（LOI）测试、垂直燃烧测试和锥形量热分析，得出的结果表明：与纯PP相比，MPOP与TPP加入PP后改善了PP的阻燃性能，LOI值从17.8提高到了19.9，锥形量热仪分析后的成炭率明显增大，同时并没有明显地影响PP的加工性能和破坏PP的物理、机械性能。是什么意思？

The main content of this paper is with homemade halogen, low smoke, low toxicity of the intumescent flame retardant melamine polyphosphate (to mpop) flame-retardant polypropylene (pp). Also mpop modification, triphenyl phosphate (tpp) complex, to study the pp in composites mechanical properties and

This paper is the main content with home-made non-halogen, low smoke, low-inflation-flame-retardant 3 brought together more than melamine phosphates (MPOP) flame retardant polypropylene (PP). In addition to the total of MPOP living modified organisms, mainly mixed with 3 phosphate esters (TPP) direc