Composites based on polyethylene terephthalate (PET) and surface-modified carbon microspheres (CMSs) were prepared by melt mixing. The surface modification of CMSs was conducted with low-temperature plasma technology first, and a phosphorus-nitrogen flame retardant, guanidine phosphate (GDP), was then grafted onto CMSs. The modification of CMSs was done to improve both the filler dispersity in the PET matrix and the flame-retardant performance of composites. The obtained CMSs-GDP was characterized by FTIR spectra and a scanning electron microscope (SEM). The grafting ratio was characterized and calculated by thermal gravimetric analysis (TGA). The grain size analysis was used to describe the dispersity of CMSs. The mechanical properties of the PET/CMSs-GDP composite were measured using a universal testing machine. The PET/CMSs-GDP composite can achieve a limiting oxygen index (LOI) value of 32.4% and a vertical burning test (UL94) V-0 rating at 3% CMSs-GDP loading.
展开▼
机译：通过熔融混合制备基于聚对苯二甲酸乙二醇酯（PET）和表面改性的碳微球（CMS）的复合材料。然后，首先用低温等离子体技术进行CMS的表面改性，然后将磷氮气阻燃剂（GANIDINE磷酸盐（GDP）接枝到CMS上。完成CMS的修改以改善PET基质中的填充分散性和复合材料的阻燃性能。获得的CMS-GDP的特征在于FTIR光谱和扫描电子显微镜（SEM）。通过热重分析（TGA）表征和计算接枝比。晶粒尺寸分析用于描述CMSS的分散性。使用通用试验机测量PET / CMS-GDP复合材料的机械性能。 PET / CMSS-GDP复合材料可实现限制氧指数（LOI）值32.4％，垂直燃烧试验（UL94）V-0等级，在3％CMSS-GDP负载下。
展开▼
