A Safety Strategy for Producing Poly(Acrylic Acid) of Low Molar Mass

2017 ◽  
Vol 11 (3) ◽  
pp. 1600049 ◽  
Author(s):  
Gerardo Cáceres Montenegro ◽  
Carolina G. Gutierrez ◽  
Santiago E. Vaillard ◽  
Roque J. Minari ◽  
Jorge R. Vega ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Molar Mass ◽  
Safety Strategy ◽  
Poly Acrylic Acid

scholarly journals The pH-responsive behaviour of poly(acrylic acid) in aqueous solution is dependent on molar mass

Soft Matter ◽  
2016 ◽  
Vol 12 (9) ◽  
pp. 2542-2549 ◽  
Author(s):  
Thomas Swift ◽  
Linda Swanson ◽  
Mark Geoghegan ◽  
Stephen Rimmer
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Molar Mass ◽  
Ph Responsive ◽  
Poly Acrylic Acid

scholarly journals Inhibition of homogenous formation of calcium carbonate by poly (acrylic acid). The effect of molar mass and end-group functionality

Desalination ◽  
2014 ◽  
Vol 338 ◽  
pp. 93-105 ◽  
Author(s):  
Ali A. Al-Hamzah ◽  
Christopher P. East ◽  
William O.S. Doherty ◽  
Christopher M. Fellows
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Molar Mass ◽  
End Group ◽  
Poly Acrylic Acid

The role of poly(acrylic acid) in conventional glass polyalkenoate cements

2016 ◽  
Vol 36 (3) ◽  
pp. 221-237 ◽  
Author(s):  
Adel M.F. Alhalawani ◽  
Declan J. Curran ◽  
Daniel Boyd ◽  
Mark R. Towler
Keyword(s):  
Acrylic Acid ◽  
Molar Mass ◽  
Clinical Performance ◽  
Ion Release ◽  
Bioactive Materials ◽  
Weight Concentration ◽  
Glass Base ◽  
Over 40 Years ◽  
Poly Acrylic Acid

Abstract Glass polyalkenoate cements (GPCs) have been used in dentistry for over 40 years. These novel bioactive materials are the result of a reaction between a finely ground glass (base) and a polymer (acid), usually poly(acrylic acid) (PAA), in the presence of water. This article reviews the types of PAA used as reagents (including how they vary by molar mass, molecular weight, concentration, polydispersity and content) and the way that they control the properties of the conventional GPCs (CGPCs) formulated from them. The article also considers the effect of PAA on the clinical performance of CGPCs, including biocompatibility, rheological and mechanical properties, adhesion, ion release, acid erosion and clinical durability. The review has critically evaluated the literature and clarified the role that the polyacid component of CGPCs plays in setting and maturation. This review will lead to an improved understanding of the chemistry and properties of the PAA phase which will lead to further innovation in the glass-based cements field.

scholarly journals Hydrogel Synthesis Directed Toward Tissue Engineering: Impact of Reaction Condition on Structural Parameters and Macroscopic Properties of Xerogels

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Borivoj Adnadjević ◽  
Jelena Jovanović
Keyword(s):  
Tissue Engineering ◽  
Acrylic Acid ◽  
Molar Mass ◽  
Structural Parameters ◽  
Scaling Exponent ◽  
Reaction Conditions ◽  
Average Molar Mass ◽  
Functional Relationships ◽  
Macroscopic Properties ◽  
Poly Acrylic Acid

The existence of correlation and functional relationships between reaction conditions (concentrations of crosslinker, monomer and initiator, and neutralization degree of monomer), primary structural parameters (crosslinking density of network, average molar mass between crosslinks, and distance between macromolecular chains), and macroscopic properties (equilibrium swelling degree and xerogel density) of the synthesized xerogels which are important for application in tissue engineering is investigated. The structurally different xerogels samples of poly(acrylic acid), poly(methacrylic acid), and poly(acrylic acid-g-gelatin) were synthesized by applying different methods of polymerization: crosslinking polymerization, crosslinking polymerization in high concentrated aqueous solution, and crosslinking graft polymerization. The values of primary structural parameters and macroscopic properties were determined for the synthesized xerogels samples. For all of the investigated methods of polymerization, an existence of empirical power function of the dependence of primary structural parameters and macroscopic properties on the reaction conditions was established. The scaling laws between primary structural parameters and macroscopic properties on average molar mass between crosslinks were established. It is shown that scaling exponent is independent from the type of monomer and other reaction conditions within the same polymerization method. The physicochemical model that could be used for xerogel synthesis with predetermined macroscopic properties was suggested.

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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