ionomers are generally described by copolymers having either acrylic or methacylic acid as one component and the other component is mostly either ethylene or styrene. the objective of this research was to study the thermal behaviour and stability of ionomers of styrene with some alkali metal acrylates. these materials have been synthesized by neutralization of the respective copolymer containin...

Ionomers are generally described by copolymers having either acrylic or methacylic acid as one component and the other component is mostly either ethylene or styrene. The objective of this research was to study the thermal behaviour and stability of ionomers of styrene with some alkali metal acrylates. These materials have been synthesized by neutralization of the respective copoly...

Thermal analysis of acrylonitrile/acrylic acid P(AN/AA) copolymer films containing 5%, 10% and 20% acrylic acid dendrigrafted with citric acid (CA) is examined using differential scanning calorimetry (DSC) with various heating rates, thermogravimetry (TGA) and derivative thermogravimetric analysis (DTG). Also, the effect of carboxylic acid on thermal stabilization of the P(AN/AA) copolymers, wh...

A series of sorbents containing various amounts of borate groups were prepared by chemical immobilization ofP-aminoethylphenylboric acid on a copolymer- treated organosilane spacer glass plates. It was found thatbaker's yeast cells selectively adhered to these supports. Yeast cells stained with procion red HE-3B formeddenser and more stable layer on the copolymer-grafted supports compared onto ...

conclusions it was shown that combination of pectin and eudragits can relatively control drug release in the upper gi. on the other hand, pectin degraded in the presence of pectinase and formulations were susceptible to the colonic media. results it was shown that in the presence of pectin, formulations without erl had a relative resistance to drug release in sgf. pellets containing pectin and ...

a series of sorbents containing various amounts of borate groups were prepared by chemical immobilization ofp-aminoethylphenylboric acid on a copolymer- treated organosilane spacer glass plates. it was found thatbaker's yeast cells selectively adhered to these supports. yeast cells stained with procion red he-3b formeddenser and more stable layer on the copolymer-grafted supports compared onto ...

175.210 Acrylate ester copolymer coating. 175.230 Hot-melt strippable food coatings. 175.250 Paraffin (synthetic). 175.260 Partial phosphoric acid esters of polyester resins. 175.270 Poly(vinyl fluoride) resins. 175.300 Resinous and polymeric coatings. 175.320 Resinous and polymeric coatings for polyolefin films. 175.350 Vinyl acetate/crotonic acid copolymer. 175.360 Vinylidene chloride copolym...

BACKGROUND AND PURPOSE Dextranomer/hyaluronic acid copolymer implants are used in treating velopharyngeal insufficiency. These posterior nasopharyngeal implants can be mistaken for pathologic conditions such as retropharyngeal abscess on imaging. We studied the imaging appearance of dextranomer/hyaluronic acid copolymer implants in patients treated for velopharyngeal insufficiency. MATERIALS ...

Macromolecular complexes of acrylamide and sodium acrylate copolymer with microelements, including Cu(II), may form at preparation crop protection stimulation compositions, where the serves as an adhesive, water-retaining film-forming agent. Preparations for production also contain amino acids that protect plants under stressful conditions (cold, dry, etc.). Carboxylic groups copolymer, carboxy...

Temperature responsive poly(N-isopropylacrylamide) (PNIPAM) exhibits a lower critical solution temperature (LCST) of approximately 32 °C in aqueous solution, below which the polymer is water soluble and above which it becomes water insoluble. The LCST of PNIPAM copolymer increases responding to hydrophilic block acrylic acid (AA). The copolymer is pH and temperature responsive. The duel respons...