الخلاصة:
In order to create grafting polymer, at first, CMS was prepared with starch and chloroacetic acid in an alkali – methanol media, and Carboxymethyl starch (CMS) was prepared by different DS, then AAM was grafted on CMS by redox system using oxidant and reductant.
For investigation of the effect of reaction variables on nitrogen content N%, the synthetic conditions were systematically optimized through studying the influential factors.
Research background
In order to study the nitrogen continent N% for a crosslinking polymer (CMS PAAM –PMBA) prepared by the redoxy system, Kjeldahl method was used
Research objective
Studying the effect of nitrogen content (N%) of (CMS PAAM –PMBA) which prepared by using the redoxy system
Research importance
Studying the nitrogen continent N% by to a Kjeldahl method of a grafting polymer by using
1- Different DS of CMS
2- Using redoxy system on CMS with AAM to make crosslinking substance
Methodology
Experimental analytical approach
Research results
The reactions of grafted copolymer variables that affect the nitrogen continent N% of the grafted polymer were studied. It is seen that with increasing the amount of CMS, the grafting decreasing, and that may have attributed to the increasing of the carboxy groups and hydrophilic group which the residue monomer concentration in the reaction mixture which leads to increasing of radical centers, causing high crosslinking points grafted polymer.
The higher nitrogen content of CMS PAAM –PMBA graft copolymer, APS =0.08g, Sod thiosulfate =0.5g, MBA= 0.8 g, AAm = 5 g, water = 1 ml, H2SO4 = 3 ml, temp. (90oC) and Time = until reaction completes (1.50 min)
