Synthesis and Properties of Anion Exchangers Derived from Chloromethyl Styrene Codivinylbenzene and Their Use in Water Treatment
Table 1
Carbon and nitrogen analysis for the various experimental runs.
(a) Effect of Functionalization agent on the amount of Nitrogen in polymer (after immersing polymer in TEA/EtOH, anhydrous TMA, aqueous TMA and ethanolic TMA at room temp. for 4 days). (VBC 66 wt%, DVB 6 wt%, BPO 3 wt% and 25 wt% Solvent (Xylene).
Type of amine
TN%
TC%
TEA/EtOH
1.86
67.5
Anhydrous TMA
0.42
75.1
TMA/H2O
3.98
69.6
TMA/EtOH
4.06
65.4
(b) Effect of cross-linker on the Nitrogen content (after immersing polymer in TMA/EtOH at room temp. for 4 days) (VBC 66, 64, 62, and 60 wt%, DVB 6,8,10,12, respectively, BPO 3 wt% and 25 wt% Solvent (Xylene).
Divenylbenzene ratio
TN%
TC%
6 wt% DVB
3.09
69.50
8 wt% DVB
2.02
72.00
10 wt% DVB
1.97
75.50
12 wt% DVB
0.97
76.90
(c) Effect of Solvent on the Nitrogen content (after immersing polymer in TMA/EtOH at for 4 days). (VBC (64 wt%, DVB 8 wt%, BPO 3 wt% and 25 wt% Solvent)
Solvent
TN%
TC%
THF (Tetrahydrofuran)
2.12
76.10
Xyl.
4.77
66.1
Xyl., THN (1:1)
5.2
67.7
(d) Effect of temperature on the Nitrogen content (after immersing polymer in TMA/EtOH for 4 days). (VBC (64 wt%, DVB 8 wt%, BPO 3 wt% and 25 wt% Solvent (THN, Xyl 1 : 1)
Temp
TN%
TC%
Room temp.
4.06
65.4
40°C
4.34
61.2
60°C
5.2
67.7
(e) TN% and TC% for different DVB ratios at C for 4 days in Xyl/THN (1:1) and ethanolic TMA.
