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Furfural‐based phosphonic acid cation exchange resins from N ‐vinylcarbazole and its polymer. II
Author(s) -
Biswas Mukul,
Packirisamy S.
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070270118
Subject(s) - dibasic acid , thermogravimetric analysis , thermal stability , furfural , polymer , chemistry , titration , polymer chemistry , isothermal process , organic chemistry , nuclear chemistry , materials science , catalysis , physics , thermodynamics
Thermal stabilities of the crosslinked N ‐vinylcarbazole/poly( N ‐vinylcarbazole)‐furfural polymers and of the phosphonic acid resins prepared thereform were studied by thermogravimetric analysis. The overall thermal stability of the crosslinked polymers is greater than the same for poly( N ‐vinylcarbazole) and is further improved upon phosphorylation. The resins are stable in 5 N acids and water at 100°C. Isothermal oxidative degradation studies of the resins indicate significant increase in the capacities. pH metric titration of the resins shows the presence of mono and dibasic phosphonic acid groups. The resins realize about 90% of their capacities within 2 min of equilibration.