Physical Gelation of Hydrophobically Modified Polyelectrolytes. 1. Homogeneous Gelation of Alkylated Poly[acrylamide-co-sodium acrylate]

Langmuir ◽  
1999 ◽  
Vol 15 (13) ◽  
pp. 4335-4343 ◽  
Author(s):  
Y. Yang ◽  
D. Schulz ◽  
C. A. Steiner
Keyword(s):  
Sodium Acrylate ◽  
Hydrophobically Modified ◽  
Physical Gelation ◽  
Poly Acrylamide

Novel pH-Sensitive Poly(Vinyl Alcohol) Based Polyampholyte as Pervaporation Membrane

2016 ◽  
Vol 852 ◽  
pp. 979-983
Author(s):  
Ping Rui Meng ◽  
Liang Bo Li
Keyword(s):  
Aqueous Solution ◽  
Vinyl Alcohol ◽  
Water Resistance ◽  
Graft Copolymerization ◽  
Sodium Acrylate ◽  
Poly Vinyl Alcohol ◽  
Permeate Flux ◽  
Ft Ir ◽  
Ethanol Aqueous Solution ◽  
Poly Acrylamide

Sodium acrylate (NaAA) and acrylamide (AM) were grafted onto poly (vinyl alcohol) (PVA) using potassium persulfate as an initiator, Graft copolymerization namely poly (vinyl alcohol)-g-poly (acrylamide/sodium acrylate) (PVA-g-PAM/SAC). The poly (vinyl alcohol)-g-poly (vinylamine/sodium acrylate) (PVAMC) was prepraed by Hofmann rearrangement.The PVAMC homogeneous membrane was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM).The water resistance of the PVAMC membranes is the best when pH of the PVAMC solutions was 4, at that time the numbers of-NH3+ and-COO- groups trended to be equal, so the isoelectric point was pH=4. At 90 °C the pervaporation of PVAMC composite membrane was tested and showed that the separation factor and the permeate flux were about 1001 and 1341 g/(m2·h) for 90wt% ethanol aqueous solution, and they were about 1297 and 1040 g/(m2·h) for 90wt% isopropanol aqueous solution.

Hydrophobic Interactions of Poly(N-isopropylacrylamide) with Hydrophobically Modified Poly(sodium acrylate) in Aqueous Solution

1997 ◽  
Vol 30 (26) ◽  
pp. 8293-8297 ◽  
Author(s):  
G. Bokias ◽  
D. Hourdet ◽  
I. Iliopoulos ◽  
G. Staikos ◽  
R. Audebert
Keyword(s):  
Aqueous Solution ◽  
Hydrophobic Interactions ◽  
Sodium Acrylate ◽  
Hydrophobically Modified

scholarly journals Ecotoxicological Properties of Tulipalin A-Based Superabsorbents versus Conventional Superabsorbent Hydrogels

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Piotr Rychter ◽  
Diana Rogacz ◽  
Kamila Lewicka ◽  
Jozef Kollár ◽  
Michał Kawalec ◽  
...  
Keyword(s):  
Stress Condition ◽  
Plant Stress ◽  
Harmful Effect ◽  
Sodium Acrylate ◽  
Poly Vinyl Alcohol ◽  
Fresh Matter ◽  
Shoot Height ◽  
Negative Effect ◽  
Poly Acrylamide ◽  
Superabsorbent Hydrogels

The Phytotoxicological Aspects of a Novel Superabsorbent/Hydrogels: poly(acrylamide-co-sodium 4-hydroxy-2-methylenebutanoate), prepared from renewable monomer Tulipalin A, on the growth and development of monocotyledonous Avena sativa and dicotyledonous Raphanus sativus, was investigated and compared with the effect of borate-crosslinked poly(vinyl alcohol), poly(acrylamide), and poly(acrylamide-co-sodium acrylate) conventional hydrogels. Tulipalin A-based superabsorbent hydrogels revealed superior properties in terms of the combination of the tested properties. The results confirmed excellent suitability of Tulipalin A-based hydrogels for application as reservoirs of water during plant stress condition. Values of fresh matter (yield) and shoot height of the examined plants growing in soil amended with these hydrogels were ca 10% higher than those of plants growing in soil without hydrogels. Reference borate-crosslinked PVA hydrogels (containing increasing amount of borax cross-linker) revealed harmful effect on plants. The negative effect was observed on most of the investigated properties, increasing with content of the hydrogel in soil and concentration of the borax in it.

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