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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   JULY 2005 , Volume 14 , Number 7 (61); Page(s) 603 To 608.
 
Paper: 

SYNTHESIS OF HIGH MOLECULAR WEIGHT PARTIALLY HYDROLYZED POLYACRYLAMIDE AND INVESTIGATION OF ITS PROPERTIES

 
 
Author(s):  RABIEI AHMAD*, ZEYNALI M.E., BAHARVAND HABIB ELAH
 
* FACULTY OF POLYMER SCIENCE, IRAN POLYMER AND PETROCHEMICAL INSTITUTE, TEHRAN, I.R. IRAN
 
Abstract: 

A continuous process for the polymerization of acrylamide and hydrolysis of functional groups in alkaline condition has been carried out. It is found that acrylamide may be polymerized and hydrolyzed in a single consequential step, whereby, both degrees of polymerization and hydrolysis can be carefully controlled. The hydrolysis of polyacrylamide to 10 and 60% degrees was facilitated in suitable amount of different alkalines. The degree of hydrolysis of samples was determined by a back titration method. We have found that sodium carbonate as an hydrolyzing agent, also acts as a retarder and its addition to polymerization solution causes the rate of polymerization reaction to decrease. The measured molecular weight of samples shows that we have reached a high molecular weight (about 12 million) and excellent water solubility. Another interesting result obtained is that the copolymer solutions showed a non-newtonian shear thinning behaviour. On the other hand, the associative behaviour is observed between the samples.

 
Keyword(s): POLYELECTROLYTES, POLYACRYLAMIDE, PARTIALLY HYDROLYZED, HIGH MOLECULAR WEIGHT, ANIONIC FLOCCULANT
 
References: 
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