Results 161 to 170 of about 4,986,391 (226)
Some of the next articles are maybe not open access.
, 1997
The conformational transitions of polyacrylic (PAA-205 and PAA-250) and polymethacrylic (PMA-100) acids have been investigated by means of electric birefringence and zero-shear viscosity measurements over a wide pH and concentration range.
H. Hoffmann, M. Liveri, F. P. Cavasino
semanticscholar +1 more source
The conformational transitions of polyacrylic (PAA-205 and PAA-250) and polymethacrylic (PMA-100) acids have been investigated by means of electric birefringence and zero-shear viscosity measurements over a wide pH and concentration range.
H. Hoffmann, M. Liveri, F. P. Cavasino
semanticscholar +1 more source
The thermal decomposition of polymethacrylic acid
Polymer, 1960Abstract When polymethacrylic acid decomposes thermally at 200°C two separate reactions occur. The minor one is depolymerization which results in small yields of monomer. The major reaction is anhydride formation by elimination of water between pairs of carboxyl groups.
D.H. Grant, N. Grassie
openaire +2 more sources
, 1993
The complex formation between poly(acrylic acid) (PAA) or poly(methacrylic acid) (PMA) with poly(ether-ester)s such as poly[oxymaloyloxypoly(oxyethylene)]s (PMEGs) and poly[oxytartaroyloxypoly(oxyethylene)]s (PTEGs) as well as with their derivatives with
M. Ignatova +4 more
semanticscholar +1 more source
The complex formation between poly(acrylic acid) (PAA) or poly(methacrylic acid) (PMA) with poly(ether-ester)s such as poly[oxymaloyloxypoly(oxyethylene)]s (PMEGs) and poly[oxytartaroyloxypoly(oxyethylene)]s (PTEGs) as well as with their derivatives with
M. Ignatova +4 more
semanticscholar +1 more source
Kinetics of hydrolysis of polymethacrylic acid esters
Polymer Science U.S.S.R., 1975Abstract Polymethacrylic acid esters have been used as examples in the development of methods for the preparation of stereoregular polymer models with a random distribution of units in the macromolecular chains, and these are used to determine individual rate constants reflecting the effect which adjacent units have on the reactivity of functional ...
V.V. Kreshetov +8 more
openaire +2 more sources
, 1958
The a.c. conductance of partially neutralized fractions of polyacrylic and polymethacrylic acids has been investigated in salt-free solutions. Experimental variables included frequency (10 to 50,000 cycles), nature of counterions (potassium, sodium, and ...
H. Eisenberg
semanticscholar +1 more source
The a.c. conductance of partially neutralized fractions of polyacrylic and polymethacrylic acids has been investigated in salt-free solutions. Experimental variables included frequency (10 to 50,000 cycles), nature of counterions (potassium, sodium, and ...
H. Eisenberg
semanticscholar +1 more source
The decay of radicals in esters of polymethacrylic acid
European Polymer Journal, 1969Abstract Free radicals produced by mechanical destruction of polymethylmethacrylate, polyethyl-methacrylate, polybutylmethacrylate and polyallylmethacrylate has been studied by the ESR method. The radicals decay in two temperature ranges around −40° and 50° (or + 5°).
B. Baková, Milan Lazár
openaire +2 more sources
EDC/NHS activation mechanism of polymethacrylic acid: anhydride versus NHS-ester
, 2015Polymer brushes of polymethacrylic acid (PMAA) and PMAA-associated polymer blends of PMAA/PNIPAM (poly-N-isopropylacrylamide) were prepared on porous silicon for further investigation of the EDC/NHS (1-ethyl-3-(3-dimethylaminopropyl)carbodiimide/N ...
Qin Yan +4 more
semanticscholar +1 more source
Journal of Nanoscience and Nanotechnology, 2010
Au nanoparticles stabilized by polystyrene-co-polymethacrylic acid microspheres (PS-co-PMAA) were prepared and characterized via X-ray diffraction (XRD), and transmission electron microscope (TEM).
Xin Zhang, Haitao Zhao, Jianhui Wang
semanticscholar +1 more source
Au nanoparticles stabilized by polystyrene-co-polymethacrylic acid microspheres (PS-co-PMAA) were prepared and characterized via X-ray diffraction (XRD), and transmission electron microscope (TEM).
Xin Zhang, Haitao Zhao, Jianhui Wang
semanticscholar +1 more source
, 2012
Methacrylic acid was polymerized on the 3-(methacryloxy)propyl trimethoxysilane-modified silica core. The carboxylic acid groups of polymethacrylic acid (PMAA) not only provide the “active-sites” for growth of the pyrrole monomers but also act as doping ...
Wenqin Wang +3 more
semanticscholar +1 more source
Methacrylic acid was polymerized on the 3-(methacryloxy)propyl trimethoxysilane-modified silica core. The carboxylic acid groups of polymethacrylic acid (PMAA) not only provide the “active-sites” for growth of the pyrrole monomers but also act as doping ...
Wenqin Wang +3 more
semanticscholar +1 more source
The gelation of aqueous solutions of polymethacrylic acid☆
Polymer, 1962Abstract The dependence of rigidity and viscosity on concentration and temperature of aqueous solutions of polymethacrylic acid was measured in a specially designed viscoelastometer. The solutions show no rigidity up to a certain critical concentration range (depending on the degree of polymerization) of about one per cent in which the rigidity rises
A. Silberberg, J. Eliassaf
openaire +2 more sources