The swelling behavior of disintegrating agents produced from microparticles of crosslinked, hydrophilic polymers was investigated as a function of time by using a swelling force measurement apparatus. The swelling force produced due to swelling of poly(acrylic acid-co-2-hydroxyethyl methacrylate) and poly(acrylic acid) was measured in various buffered solutions as a function of time and the swe...

We present the hysteresis of the response of the poly(N-isopropylacrylamide)-co-acrylic acid microgel-based etalons to solution temperature and pH changes. We find that the optical hysteresis of the etalon can be controlled using various solution ionic strengths and/or counterions, as well as by varying the microgel's acrylic acid concentration.

We describe here the first example of the synthesis of 4-arm star poly(acrylic acid) for use as a water-soluble drag reducing agent, by applying Cu(0)-mediated polymerization technique. High molecular weight 4-arm star poly(tert-butyl acrylate) (Mn = 3.0-9.0 x 10 5 g mol -1 ) was first synthesized using 4,4’-oxybis(3,3-bis(2-bromopropionate)butane as an initiator and a simple Cu(0)/TREN catalys...

Blends of polyacrylonitrile (PAN) with three different sacrificial polymers: poly (acrylic acid) (PAA), (methyl methacrylate) (PMMA), and (styrene-co-acrylonitrile) (SAN), were gel spun, oriented through the drawing process, stabilized carbonized to obtain porous carbon fibers. Carbon fibers an average pore diameter 15 nm, 31 37 nm 115 have been obtained from PAN-PAA (90/10), PAN-PMMA PAN-SAN (...

Two temperature sensitive drug carriers, poly (N-isopropylacrylamide-co-acrylic acid) (PNIPA-co-AA) and poly (N-isopropylacrylamide-vinyl pyrrolidone-acrylic acid) (PNIPA-VP-AA), were successfully synthesized through free radical mechanism. The diameters of PNIPA-co-AA and PNIPA-VP-AA particles can be regulated to be less than 100 nm, which were related to surfactant sodiumdodecyl sulfate and i...