粘度法测定部分水解聚丙烯酰胺的分子量

DETERMINATION OF MOLECULAR WEIGHT OF PARTIALLY HYDROLYZED POLYARYLAMIDE BY VISCOSIMETRY

在 2 5℃、浓度为 1mol L的NaCl水溶液中 ,测定了聚合度 (DP)为 1 48× 10 3～ 3 79× 10 4的聚丙烯酰胺 (PAM)及其水解度 (h)在 0 %～ 70 %之间的部份水解聚丙烯酰胺 (HPAM)的特性粘度 ([η]) .根据聚电解质理论和Kowblansky的研究结果 ,建立了特性粘度 [η]与聚合度DP、水解度h之间的定量关系式 :[η]=0 1113DP0 83 2 9+0 9973DP0 753 1 (1- 0 81h1 2 )h .用该式处理方献数据 ,其平均误差为 13 74%

The intrinsic viscosity([ η ]) of partially hydrolyzed polyacrylamide(HPAM) was measured in 1?mol/L NaCl aqueous solution.The range of hydrolysis degree( h ) of HPAM was 0%～70% and polymerization degree( DP ) of HPAM was 1 48×10 3～3 79×10 4.By the theories of polyelectrolyte and the Kowblansky's studying conclusion,the function of [ η ] with h,DP was established as: [ η]=0 1113 DP 0 8329 +0 9973 DP 0 7531 (1-0 81h 1/2 )h M=71DP(1+2371h) The M in the equation is molecular weight of HPAM.The results from the equation are in good agreement with the experiments and the reference data.Its average error is ±13 74%.Therefore,the molecular weight of HPAM with various degree of hydrolysis was established by these two equation.