The objective of the present study is to develop and investigate the swelling behavior of pH-sensitive Superporous Hydrogel (SPH) and SPH composite (SPHC). A novel superporous hydrogel containing poly (methacrylic acid-co-acrylamide) was synthesized from methacrylic acid and acrylamide through the aqueous solution polymerization, using N,N-methylenebisacrylamide as a crosslinker and ammonium...

Polymerization was carried out using the method of radiation initiation. Experiments were on methacrylic acid derivatives with bulky substituents (isodecyl and benzyl). The regularities its formation are investigated. conditions for obtaining a homogeneous copolymer determined. A polymer molecular weight more than 10 6 g/mol obtained. An increase in viscosity an temperature solution shown.

Grafted poly (methacrylic acid-g-ethylene glycol) [P(MAA-g-EG)] copolymers were synthesized and their pH sensitivity was investigated. P(MAA-g-EG) membranes showed pH sensitivity due to complex formation and dissociation. Uncomplexed equilibrium swelling ratios were 40 to 90 times higher than those of the complexed states and varied according to copolymer composition and poly(ethylene glycol) (...

In this paper, 4-hydroxybutylvinyl polyoxyethylene ether (VPEG), methacrylic acid (MA) and methylene phosphate (MEPA) are used as main raw materials to synthesize a hexa-carbon polycarboxylate superplasticizer with high workability under the action of an iniator. The test results show that has water-reducing rate good slump-retention, its is greatly increased, which can be in practical concrete...