研究了二乙基次磷酸铝、次磷酸铝、聚磷酸三聚氰胺3种P系阻燃剂协同氰尿酸三聚氰胺对EVA/PE材料拉伸性能和阻燃性能的影响。根据实验表明,次磷酸铝阻燃剂协同氰尿酸三聚氰胺对EVA/PE复合材料的拉伸性能最好。35%氧指数对比,二乙基次磷...研究了二乙基次磷酸铝、次磷酸铝、聚磷酸三聚氰胺3种P系阻燃剂协同氰尿酸三聚氰胺对EVA/PE材料拉伸性能和阻燃性能的影响。根据实验表明,次磷酸铝阻燃剂协同氰尿酸三聚氰胺对EVA/PE复合材料的拉伸性能最好。35%氧指数对比,二乙基次磷酸铝协同氰尿酸三聚氰胺阻燃EVA/PE复合材料只需要添加25份,次磷酸铝需要添加35份,而聚磷酸三聚氰胺需要添加45份。二乙基次磷酸铝阻燃剂协同氰尿酸三聚氰胺对EVA/PE复合材料的阻燃效率比次磷酸铝和聚磷酸三聚氰胺高,当添加量达到30份时就可以达到1.6 mm V-0,同时也能够通过UL1581 VW-1阻燃级别;而次磷酸铝需要添加40份,聚磷酸三聚氰胺需要添加45份。另外,P系阻燃剂添加量的增加对EVA/PE复合材料的拉伸性能具有明显的破坏作用。展开更多
A pre-column derivatization HPLC method for the determination of peimine(P)and peiminine(PE)in Bulbus Fritillariae has been developed. Under the derivatization conditions optimized,the calibration curve is Y1=-3.83...A pre-column derivatization HPLC method for the determination of peimine(P)and peiminine(PE)in Bulbus Fritillariae has been developed. Under the derivatization conditions optimized,the calibration curve is Y1=-3.83×103+1.33 ×105X1,r=0.998 for P and Y2=-7.86 × 102+6.33 × 104X2,r=0995 for PE,where Y is the peak area and X is the weight of the alkaloid; the average recovery is 98.0%(n=5, RSD=2.1%) for P and 101.0%(n=5,RSD=4.1%)for PE,the linear range is from 0.504 μg to 3.126μg for P and from 0.520μgto 3.328μgfor PE,respectively. Results of the determination of the two alkaloids in several samples of different Fritillaria species from various parts ofthe country are presented.The results suggest that P and PE are two major chemical constituents in bulbs of different Fritillaria species,and that the method developed is generally appli-cable to the determination of the hydroxy group on aliphatic fused ring systems without steric hin-drance.展开更多
文摘研究了二乙基次磷酸铝、次磷酸铝、聚磷酸三聚氰胺3种P系阻燃剂协同氰尿酸三聚氰胺对EVA/PE材料拉伸性能和阻燃性能的影响。根据实验表明,次磷酸铝阻燃剂协同氰尿酸三聚氰胺对EVA/PE复合材料的拉伸性能最好。35%氧指数对比,二乙基次磷酸铝协同氰尿酸三聚氰胺阻燃EVA/PE复合材料只需要添加25份,次磷酸铝需要添加35份,而聚磷酸三聚氰胺需要添加45份。二乙基次磷酸铝阻燃剂协同氰尿酸三聚氰胺对EVA/PE复合材料的阻燃效率比次磷酸铝和聚磷酸三聚氰胺高,当添加量达到30份时就可以达到1.6 mm V-0,同时也能够通过UL1581 VW-1阻燃级别;而次磷酸铝需要添加40份,聚磷酸三聚氰胺需要添加45份。另外,P系阻燃剂添加量的增加对EVA/PE复合材料的拉伸性能具有明显的破坏作用。
文摘A pre-column derivatization HPLC method for the determination of peimine(P)and peiminine(PE)in Bulbus Fritillariae has been developed. Under the derivatization conditions optimized,the calibration curve is Y1=-3.83×103+1.33 ×105X1,r=0.998 for P and Y2=-7.86 × 102+6.33 × 104X2,r=0995 for PE,where Y is the peak area and X is the weight of the alkaloid; the average recovery is 98.0%(n=5, RSD=2.1%) for P and 101.0%(n=5,RSD=4.1%)for PE,the linear range is from 0.504 μg to 3.126μg for P and from 0.520μgto 3.328μgfor PE,respectively. Results of the determination of the two alkaloids in several samples of different Fritillaria species from various parts ofthe country are presented.The results suggest that P and PE are two major chemical constituents in bulbs of different Fritillaria species,and that the method developed is generally appli-cable to the determination of the hydroxy group on aliphatic fused ring systems without steric hin-drance.
