STUDY ON POLYMER-RARE EARTH METAL ION COMPLEXES Ⅰ. FLUORESCENT PROPERTIES OF POLY(ACRYLIC ACID-CO-4-VINYLPYRIDINE)-RARE EARTH METAL COMPLEXES

A kind of copolymer of acrylic acid and vinylpyridine was synthesized and the fluorescent properties of the complexes of the copolymer with Eu~(3+) or Tb~(3+) were studied. It was found that the fluorescence intensity of the complexes of the eopolymer with Eu~(3+) was 20 times as high as that of the complexes of polyaerylic acid with Eu~(3+) and twice as high as that of the complexes of polyvinylpyridine with Eu~(3+). The effects of the composition of the copolymer and the content of Eu~(3+) or Tb~(3+) in the complexes were studied. The fluorescence lifetime of the complexes was measured and it was found that two or more kinds of energy transfer mechanism existed.     

动态渗透压法测定水溶性聚电解质的分子量

用动态渗透压法,在适量含盐的水溶液中测量聚电解质——尿素改性磺化酚醛(SPU)的分子量。选取预计平衡点附近所作H-dv/dt的上升线为基准来测定溶液的平衡渗透压。从陶南渗透压求得SPU和第二维利系数A_2,比一般统计线团的A_2大,由A_2算得的Z~2/C'_s值,表征聚离子上有效荷电情况,其大小次序与样品处理钻井泥浆的降失水性能相一致,即Z~2/C'_s数值大则泥浆失水量小。因此, Z~2/C'_s值是聚电解质特性的一个有意义的量。