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Citation: Bo Shuqin, Hao Kejun. DEPENDENCE OF INTRINSIC VISCOSITY OF POLYACRYLAMIDE AND HYDROLYZED POLYACRYLAMIDE ON CONCENTRATION OF ADDED SALT AND TIME[J]. Chinese Journal of Applied Chemistry, ;1986, 3(6): 76-79. shu

DEPENDENCE OF INTRINSIC VISCOSITY OF POLYACRYLAMIDE AND HYDROLYZED POLYACRYLAMIDE ON CONCENTRATION OF ADDED SALT AND TIME

Bo Shuqin ,
Hao Kejun

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 25 September 1985
Available Online: 23 May 1986

The dependence of the intrinsic viscosities of polyacrylamide(PAM)and hydrolyzedpolyacrylamide(HPAM) in water on the concentration of added salt (sodium nitrate)and time was studied.The intrinsic viscosities of HPAM decrease with the increase ofthe concentration of added salt.When the salt concentration is high,the ratio[η)/M isinversely proportional to the concentration of salt added to the polyelectrolytes. The Solution instability of PAM and HPAM was examined in 1M NaNO₃ aqueoussolution for samples with different molecular weight and hydrolyzed degree. The solu-tion viscosities decrease with time. After a certain period of storage the ratio ((ηsp/C)t₀ - (ηsp/C)ti)/(ηsp/C)t₀ is found to be proportional to the logarithm of M_w. M_w stands for the apprent molecular weight of HPAM.
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