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C.t.n. Kozykeeva R.A., C.t.n. Assilbekova A.D.

International Kazakh-Turkish University named after H.A. Yassaui, citi Shimkent

 

Influence of functional group to the process of polyelectrolyte formation

         Learning structural formation of soil despertion  in presence of soluble polyelectrolyte has main theoretical and practical meaning. /1.2./ It connects with, that fertility of soil in equal levels depends on chemical composition and structural condition.  However, last years in all regions of Kazakhstan structural condition of soil goes worse, because of increasing negative influence of economical activities of person. For this reason, the comparative study of effects of  polyelectrolyte  having different densities, nature and  level of ionization  functional group in the structure of soil,- is actual problem in modern chemistry. To find the answer to the given problem we choose mono functional  polyelectrolyte – carboxyl group containing polyacrylic  acid (PAA) which are presents the product of polymerization aqueous acrylic acid solution in ph changing conditions with hydrogen peroxide H2O2. Also, to learn chosen anion  type polyelectrolyte contains very dense  carboxyl group, which is produced by copolymerization urea with acrylic acid where mole ration between monomers is 1: 2 named as SMA, also carboxyl acid contains   polyelectrolyte STMAK has taken by copolymerization of MK with TM where mole ration of monomers is 1:2.

         Changes in properties of chosen polyelectrolyte has studied by measuring taken [Í t] and given  [Í g]  viscosity, [Í t] and given  [Í g]  electro-conductivity which depends on concentration and ph of solution  polyelectrolyte. Structural formation of PE action marked by determining changes of quantity water solidly aggregates with unstructured sulpher earthly  soil region Shimkent by the methods of adding concentration  and ph solution of  polyelectrolyte.  /3/

         Table 1 shows that the meaning of studied Í t and Xg  gives opposite effect, it increase with decreasing concentration.

 

Table 1. Changes of viscous Í , electrical conductivity ǽ, structural  formed  process and ph of polyelectrolyte solution in depending on concentration.

¹

Ñ, g/le

 Í t

Í g

Xg

Xt

ðÍ

RW %

Êeñd

SMA

1

 

 

 

 

 

5,80

0,00

0,00

2

0,010

0,09

9,00

0,62

62,00

4,15

15,30

30,50

3

0,025

0,18

7,20

1,49

59,63

3,70

20,00

16,00

4

0,050

0,28

5,60

2,75

53,5

3,38

24,50

9,75

5

0,100

0,49

4,90

5,20

52,00

2,85

29,30

5,83

6

0,250

1,25

5,00

9,18

36,58

2,55

35,65

2,83

7

0,500

3,36

6,72

16,50

33,00

2,35

43,50

1,74

8

1,000

8,25

8,25

25,30

25,30

2,22

50,00

1,00

STMAK

1

 

 

 

 

 

5,85

 

 

2

0,010

0,13

13,00

0,78

78,00

3,50

18,55

37,55

3

0,025

0,17

7,43

1,65

65,00

3,25

25,00

19,30

4

0,050

0,27

5,75

2,70

55,00

2,90

30,00

11,55

5

0,100

0,35

3,50

4,85

48,00

2,70

36,35

6,85

6

0,250

0,55

2,25

10,50

42,00

2,50

41,45

2,96

7

0,500

0,91

1,85

19,05

38,00

2,39

46,55

1,79

8

1,000

1,70

1,70

36,20

36,20

2,20

52,00

1,00

PMAK

1

0,010

0,36

36,00

0,42

42,00

3,95

7,10

18,00

2

0,025

0,75

28,35

0,75

29,60

3,75

10,55

11,05

3

0,050

1,45

28,20

1,15

23,25

3,50

14,00

7,35

4

0,100

2,05

20,75

1,80

18,30

3,30

20,50

5,25

5

0,250

4,10

16,45

3,55

14,25

2,90

28,85

3,05

6

0,500

7,65

15,30

5,07

10,14

2,70

34,50

1,80

7

1,000

16,20

16,20

 

8,20

2,55

38,00

1,00

         Such regularity connects with the measure of decreasing concentration and the changes of ph value from acid to neutral, because of weakening ion force of  

   polyelectrolyte solution growth the quantity of ionization functional group in the chain of macromolecule. To the author’s  opinion it leads to grow value of  Í g  because of conversion macromolecule from rolling up  condition to more unwrapped conformational condition. Growth of the value of Xg , explains by increasing quantity of ionization functional group, which takes part in transferring electrical current.  

         Changes in analyses VPA about growth of quantity depends from concentration of adding   polyelectrolyte. However, quantity of water solidly aggregates depends not only  from  concentration added  polyelectrolyte solution, but also from appearance, dense and level of ionization functional group. This difference especially seems in comparing value Keñd calculated by formula, which is reflects effectiveness of structural formation action.

         For this meaning, short meaning of [Xt] in neutral ph meaning connects with the same quality of contrary charge. Strengthen structural formed  action in ph conditioned with presence of maximum quality of active ionization functional group, which is capable to form connection with surfaced parts and unfolded condition of macromolecule which testified highest meaning of viscous. (Table 2)

         By the way, it reveals that the value of  Kecd increase  with less adding concentration. However, it is necessary to take into consideration , that the value and character of changed Kecd depends  on from nature and dense of functional group. We could dispose polyelectrolyte to the line of  STMAK > PMAK > SMA, by their structural formed abilities.

         Lesser PE  SMA 's structural formed ability, espessially in concentrated parts, connects with considerable dicreasing quantity of free functional group, which could made connectin with surface soiled parts and to shorten  the length of macromolecule chain, then it comes to loose oval properties /6/.

         STMAK with the weak structural formed action could connect with strongest interfunctional  interaction of its electro statistical character with weak positive charged amid and negative charged carboxyl group . More highest structural formed action of STMAK as compared with another PE to all investigated  interval concentration could be explained with the higher dense of the same type of functional group disposed along the chain of macromolecule, differed from each other valued constant ionization, conditioned  by unfolded conformational condition of macromolecule with wide interval concentration and ph solution. Presence of correlation between constant ionization functional group  with the length of macromolecule’s chain and also with structural formed  action of PE could be traced to define [Í]  ; [ǽ]  and changes in quantity of  VPÀ  in depends of  VPÀ   and ph solution . (Table 2)

Table 2. Changes of viscous [Í g], electrical conductivity Xt and  structural  formed  process of pol倘electrolyte in depends of ph solution.

¹

ðÍ

Í g

Xg

RW %

Í g

Xg

RW %

SÒÌÀÊ

PMAK

1

1,55

2,10

60,25

22,5

3,85

25,55

22,55

2

2,45

4,15

36,35

29,75

4,55

9,15

25,50

3

3,45

7,15

7,30

32,00

6,75

3,85

28,00

4

4,50

21,65

3,25

35,15

13,35

2,45

31,00

5

5,50

41,65

2,30

39,10

25,60

2,30

34,00

6

6,80

48,50

1,40

47,55

27,35

2,10

34,55

7

7,35

53,45

1,55

53,30

28,50

2,00

39,35

8

8,55

58,40

2,53

55,75

30,90

3,95

41,75

9

9,35

39,75

6,05

58,70

30,65

5,45

43,55

10

10,90

30,75

9,30

61,50

25,14

9,60

44,50

11

12,05

23,60

17,50

63,50

15,50

19,50

46,00

         To save more higher structural formed activity of  PE, even some levels of strengthening in more higher meaning of  ph could connected in changing summaries of macrons charges which is stipulated for further better condition of macromolecule to form connection with  the surface of soil part.

         Thus, given statistics lets to reveal presence of correlation between nature, dense and level of ionization functional group and structural formed action of PE, which is necessary to take in to consideration how important this factor, which is influenced to the process of structural formed of soil in presence of polyelectrolyte. 

Literature

1.     Yergojin E.E., Tausarova B.T. Rastvorimie elektroliti.À.                                                                                                       Nicolayev A.F.,Vodorastvorimie polimeri.L.Khimia1991. -Ð.112-120

2. Sidrov T.M., Ahmadov K.S. Poluchenie iskusstvennih structur v pochve s                                   pomoshu polimernih preparatov // Guminovie I polimernie prearati v selskom hoziaistve – Tashkent: 1961. –Ð. 77-79

3. Ahmedov K.S., Aripov E.A. I dr./Vodorastvorimie polimeri I ih vzaimodeistvie s dispersnimi sistemami-Tashkent:FAN 1969.-P.31-4