Extreme difference of polarities in a single material: Poly(acrylic acid)-based amphiphilic conetworks with polyisobutylene cross-linker

2017 ◽  
Vol 55 (11) ◽  
pp. 1818-1821 ◽  
Author(s):  
Szabolcs Pásztor ◽  
Béla Iván ◽  
Gergely Kali
Keyword(s):  
Acrylic Acid ◽  
Extreme Difference ◽  
Cross Linker ◽  
Single Material ◽  
Poly Acrylic Acid

A new approach for the immobilization of poly(acrylic) acid as a chemically reactive cross-linker on the surface of poly(lactic) acid-based biomaterials

2017 ◽  
Vol 71 ◽  
pp. 862-869 ◽  
Author(s):  
Ksenia S. Stankevich ◽  
Nadezhda V. Danilenko ◽  
Ruslan M. Gadirov ◽  
Semen I. Goreninskii ◽  
Sergei I. Tverdokhlebov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acrylic Acid ◽  
Poly Lactic Acid ◽  
New Approach ◽  
Cross Linker ◽  
Poly Acrylic Acid

Synthesis and properties of sodium alginate/poly(acrylic acid) double-network superabsorbent

e-Polymers ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 271-278 ◽  
Author(s):  
Jie Wu ◽  
Yanmei Zhou ◽  
Yang Meng ◽  
Jiaxing Zhang ◽  
Qingbing Liu ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Metal Ion ◽  
Step Method ◽  
Experimental Conditions ◽  
Double Network ◽  
Metal Ion Removal ◽  
Removal Capacity ◽  
Cross Linker ◽  
Poly Acrylic Acid

AbstractA tough double-network (DN) superabsorbent was synthesized by a two-step method using N,N-methylenebisacrylamide as a covalent cross-linker for one monomer [acrylic acid (AA)], Ca2+ (CaCl2) as an ionic cross-linker for the other monomer (sodium alginate [SA]) and ammonium peroxodisulfate as the redox initiator. The optimized experimental conditions for the absorbency in deionized water were determined according to orthogonal experiments. Unlike conventional chemical cross-linked single-network superabsorbents, SA/poly(acrylic acid) (PAA) DN superabsorbents exhibit superb mechanical properties. Compared with the tensile strength of PAA-only superabsorbents, that of SA/PAA DN superabsorbents showed an approximately 371.9% increase with increasing amount of 6 wt.% SA. We also investigated the capacity of SA/PAA DN superabsorbents to remove heavy metal ions. It was found that the addition of SA can truly increase the metal ion removal capacity of the PAA superabsorbents and that the affinity order was Pb2+>Zn2+.

scholarly journals Mechanically tough and highly stretchable poly(acrylic acid) hydrogel cross-linked by 2D graphene oxide

RSC Advances ◽  
2020 ◽  
Vol 10 (18) ◽  
pp. 10949-10958 ◽  
Author(s):  
Stephen Don Sarkar ◽  
Md. Mosfeq Uddin ◽  
Chanchal Kumar Roy ◽  
Md. Jahangir Hossen ◽  
Majharul Islam Sujan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Acrylic Acid ◽  
Highly Stretchable ◽  
Cross Linker ◽  
Poly Acrylic Acid

Incorporation of a novel GO based cross-linker into the conventional poly(acrylic acid) hydrogel remarkably enhances the toughness and stretchability.

Preparation and Water-Absorbing Capacity of Poly(Acrylic Acid)/Montmorillonite Composites

2013 ◽  
Vol 404 ◽  
pp. 393-397
Author(s):  
Kui Chen ◽  
Tian Yun Zhang ◽  
Xiao Ping Zheng
Keyword(s):  
High Temperature ◽  
Acrylic Acid ◽  
Polymerization Reaction ◽  
Microporous Structure ◽  
Reaction Condition ◽  
Nanophase Materials ◽  
Cross Linker ◽  
The Relationship ◽  
Superabsorbent Composites ◽  
Poly Acrylic Acid

Poly (acrylic acid)/montmorillonite (PAA/MMT) superabsorbent composites was synthesized by high temperature rapid-induced solvent polymerization reaction. The structure of this composites was investigated by XRD. The relationship between reaction condition and water-absorbing capacity of this composites was researched. The result shows that, when montmorillonite content is less than 5 wt%, PAA/MMT composites is nanophase materials. With the increase of cross linker, neutralization degree of acrylic acid, or montmorillonite content, water-absorbing capacity of prepared composites first rises then decreases. When cross linker content is 0.225 wt%, neutralization degree is 70%, and montmorillonite content is 5 wt%, PAA/MMT composites possess microporous structure and its water-absorbing capacity is 511 times of the solid weight itself.

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

Reactions of macroions with ester and carboxylic groups of polymers

1987 ◽  
Vol 52 (9) ◽  
pp. 2194-2203
Author(s):  
Miloslav Kučera ◽  
Dušan Kimmer ◽  
Karla Majerová ◽  
Josef Majer
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Bond Formation ◽  
Covalent Bond ◽  
The Other ◽  
Poly Methyl Methacrylate ◽  
Other Hand ◽  
Carboxylic Groups ◽  
Poly Acrylic Acid

In the reaction of dianions with poly(methyl methacrylate), only an insignificant amount of insoluble crosslinked product is obtained. If, however, the concentration of grafting dianions approaches that of ester groups, the amount of poly(methyl methacrylate) which may thus be crosslinked becomes quite significant. Dications, too, can bring about crosslinking of only an insignificant number of poly(methyl methacrylate) chains. Carboxylic groups in poly(acrylic acid) react with dianions and dications in an anhydrous medium similarly to ester groups. On the other hand, in the presence of a cocatalytic amount of water dications are more readily bound to carboxylic groups, forming a covalent bond. The relatively highest efficiency was observed in the bond formation between dication and the poly[styrene-alt-(maleic anhydride)], both in an anhydrous medium and in the presence of H2O.

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