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Polyacrylic Acid, PAA

Leadley and Watts also investigated the interaction of polyacrylic acid (PAA) with oxidized metal substrates [26]. Through careful curve fitting of the C(ls) spectra, three specific types of interaction between PAA and the oxidized metal... [Pg.271]

Polyacrylic acid (pAA) homopolymers and related copolymers have become a commercially important class of water-soluble polymers. Acrylic acid polymers can range in molecular mass from less than 1000 Da to greater than 1,000,000 Da. A representative set of analysis conditions is... [Pg.540]

A wide range of polyacrylic acids (PAAs), polymethacrylic acids (PMAAs), polyacrylamides (PAMs), their salts and homo-, co-, and terpolymer derivatives are available from a great many manufacturers around the world today. Polyacrylates especially are a backbone of BW chemical formulations and are manufactured with an almost infinite variety of average molecular weights (MWs), MW distributions, activity strengths, and other characteristics. [Pg.445]

Recently, Kong et al. [159] functionalized MWNT with polyacrylic acid (PAA) and poly(sodium 4-styrenesulfonate) (PSS) by surface-initiating ATRP (atom transfer radical polymerization) following the Schemes 1 and 2 ... [Pg.513]

Polyacrylic acid (PAA) was obtained from Scientific Polymers, Inc., Ontario, NY, as a secondary standard with a mass-averaged molecular weight of two million. The polyacrylamide (PAM) used was Separan MGL obtained from Dow Chemical Company, Midland, MI. Its reported molecular weight was in the range of 500,000 to 5,000,000. The monomer structures of PAA and PAM are illustrated in Figure 1. [Pg.292]

The labelled polyacrylic acid PAA-M, used for polarized luminescence measurements, was prepared by grafting of 9-aminoacridine on the PAA-800 000 chain (15). The degree of derivatization of the polyacid (evaluated from the UV-vis spectra of PAA-M And 9-aminoa-cridine) is very low ... [Pg.73]

Tables 7.6 and 7.7 compare the binding affinities of sites on the a-Al203 (0001), a-Al203 (1-102), and a-Fe203 (0001) surfaces and those in various types of bacteria, natural organic matter, and polyacrylic acid (PAA). The metal oxide substrates and humic acid are characterized by two binding sites, one strong and one weak, for Pb(II). The stability constant for the PAA-Pb(II) complex (i.e., ML2 species) is typically larger than those of higher affinity mineral surface binding sites (i.e., Mj). Tables 7.6 and 7.7 compare the binding affinities of sites on the a-Al203 (0001), a-Al203 (1-102), and a-Fe203 (0001) surfaces and those in various types of bacteria, natural organic matter, and polyacrylic acid (PAA). The metal oxide substrates and humic acid are characterized by two binding sites, one strong and one weak, for Pb(II). The stability constant for the PAA-Pb(II) complex (i.e., ML2 species) is typically larger than those of higher affinity mineral surface binding sites (i.e., Mj).
Comparison of ( ) binding affinities (log stability constants) for various microorganisms, natural humic acid, and polyacrylic acid (PAA) (from [181]). [Pg.501]

In a related study, Yoon et al. [181] used XSW-FY methods to study the partitioning of aqueous Pb(II) between metal oxide substrates and polyacrylic acid (PAA)... [Pg.502]

Polymethylmethacrylate (PMMA) Polyisodecylmethacrylate Polyacrylic acid (PAA) Polyacrylamide (PAAm) Hydrolyzed polyacrylamide Glyoxylyzed polyacrylamide Polyisobutylene (PIB) Polyethyleneoxide (PEO) Polystyrene Polystyrenesulfonate Polyethylenimine (PEI) Polyvinylalcohol (PVA) Polyvinylpyrrolidone (PVP) Poly-cw-isoprene (PCIP)... [Pg.121]

The structures of polyacrylic acid (PAA) and polymethacrylic acid (PMAA) are shown in Figure 5.2. [Pg.154]

Polyacrylic acid stabilised latices have been prepared by aqueous dispersion polymerisation. The method used is analogous to the non-aqueous dispersion (NAD) polymerisation methods originally used to prepare polymethyl methacrylate particles in aliphatic hydrocarbons (1. In effect the components of a NAD polymerisation have been replaced as follows aliphatic hydrocarbon by aqueous alcohol, and degraded rubber, the stabiliser, by polyacrylic acid (PAA). The effect of various parameters on the particle size and surface charge density of the latices is described together with details of their colloidal stability in the presence of added electrolyte. [Pg.171]

Figure 2. Effect of (A) Polyacrylic Acid (PAA) and (B) Xanthated Polyacrylic Acid (PAAX) Dispersants on the Flocculation of Anthracite Coal and Pyrite Suspensions with Purifloc-A22 (2 mg/1) at pH 10. Reproduced with permission from Ref. 9, Copyright 1985, Elsevier. Figure 2. Effect of (A) Polyacrylic Acid (PAA) and (B) Xanthated Polyacrylic Acid (PAAX) Dispersants on the Flocculation of Anthracite Coal and Pyrite Suspensions with Purifloc-A22 (2 mg/1) at pH 10. Reproduced with permission from Ref. 9, Copyright 1985, Elsevier.
Hydroxypropyl cellulose (HPC) Hydroxyethylcellulose (HEC) Methylcellulose (MC) Polvinyl alcohol (PVA) Polyacrylic acid (PAA) Poly (meth) acrylic acid ester (PMAA) Polyvinyl pyrrolidone (PVP) Polyethylene glycols (PEG) White wax... [Pg.154]

Early antisealants used sodium hexametaphosphate (SHMP) as a threshold agent to inhibit the growth of calcium carbonate and sulfate-based scales.6 Most antisealants on the market today contain sulfonate, phosphate, or carboxylic acid functional groups. Perhaps the most effective antisealants today contain and blend of polyacrylic acid (PAA) and phosphoric acid or polyacrylate and a hydroyethylidene diphosphonate (HEDP).12 The polyacrylate-HEDP blends also claim to have good dispersion qualities toward silts and clays.12 Some new inhibitors include a chelant and disper-ant to keep suspended solids such as iron and manganese oxides in solution. These newer antisealants are generally more effective than SHMP for a variety of potential scales.6... [Pg.178]

DNA-conjugated polymers were prepared from polyallylamine or polyacrylic acid (PAA) modified with ssDNA as a probe, and thioctic acid (TA) or 3-(pyridyldithio)propionyl hydrazide (PDPH) for self-assembled immobilization. The oligonucleotides sequences of the probes and of the fully matched and unmatched DNAs were S -TCC-TCT-TCA-TCC-TGC-TGC-TAT-GCC-TCA-TCT-T-R, 5 -AGA-TGA-GGC-ATA-GCA-GCA-GGA-TGA-AGA-GGA-3, ... [Pg.96]

FIGURE 15.6 Differential thermal gravimetry of pyrolysis for polyacrylic acid (PAA ... [Pg.750]

Many different complexing agents and adsorbents were examined. As ligands attaching ions of Cr, Co, and Cs, polyethyle-neimine (PEI), microcrystalhne chitosan (MCH), polyacrylic acid (PAA) and its derivatives, polyvinylpyrolidone (PVD) and suspension of hexacyanoferrates of transient metals were applied [62,71]. [Pg.857]

Polyacrylic acid (PAA)—P2VP mixed brushes were prepared by a similar synthetic procedure, by grafting of carboxyl-terminated poly(ferf-butyl acrylate) (PtBuA) and P2VP. Afterwards, PtBuA was hydrolyzed in the presence of p-toluene sulfonic acid. The same strategy was employed to graft mixed PEL brushes on polymer surfaces. In this case plasma treatment was used to functionalize surface of polymer substrates. We introduced amino groups on the surface of PA-6 and PTFE by treatment of the polymer samples with NH3 plasma. Then the carboxyl terminated homopolymers were grafted step by step from the melt to the solid substrate via amide bonds. [Pg.121]

Figure 9. Radiation-processed polyacrylic acid (PAA) composites for bone... Figure 9. Radiation-processed polyacrylic acid (PAA) composites for bone...
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