The activation energy for the rate of polymerization was between 9 and 13 kcal/mol except for 100% neutralized acrylic acid, which had an activation energy of 18 kcal/mol. These data suggest that a transition in mechanism occurred at 100% neutralization. Increasing the ionic strength by the ...
摘要: This invention is directed to certain N,N'-dinitroso phenylenediamines useful as polymerization inhibitors for acrylic acids and esters thereof. Also disclosed are compositions containing such compounds, and methods for inhibiting polymerization using such compounds and compositions....
Acrylic, any of a broad array of synthetic resins and fibres that are based on derivatives of acrylic and methacrylic acid. Both acrylic acid (CH2=CHCO2H) and methacrylic acid (CH2=C[CH3]CO2H) have been synthesized since the mid-19th century, but the pra
While oxygen functions as an inhibitor in acrylic acid polymerizations, MEHQ was shown to function as a retarder. The decrease in the rate of polymerization allowed the calculation of an inhibition constant for this system. MEHQ was found to remain in the polymerizing mixture throughout the ...
-acetylaminoacrylic acid was kinetically investigated in dimethylsulfoxide (DMSO) and aqueous DMSO. The polymerization conforms to a conventional radical equation (rule of square root), independently of pH. However, the polymerization rate is greatly dependent on pH: The rate decreases with pH increas...
Summary This chapter contains sections titled: Introduction The Photodegradation Mechanism Polymer Structures The Time-Resolved EPR Experiment Tacticity and Temperature Dependence of Acrylate Radicals Structural Dependence Oxo-Acyl Radicals Spin Polarization Mechanisms Solvent Effects Dynamic Effects Conclusions关键...
Plasma graft polymerization of Acrylic Acid and immobilization of Heparin to improve blood compatibility of Polyethylene terephthalate (PET). 来自 Semantic Scholar 喜欢 0 阅读量: 27 作者:S Eftekhari,H Mirzadeh 摘要: Polymeric materials have been attracted the attention of researchers in various R&D ...
These acrylic acid polymers are crosslinked with allyl sucrose or allyl pentaerythritol. The polymerization solvent used previously was benzene; however, some of the newer commercially available grades of carbomer are manufactured using either ethyl acetate or a cyclohexane–ethyl acetate cosolvent mixture....
Polymer production: Acrylic acid is widely used in the production of polymers such as acrylic resins and superabsorbent polymers. Its purpose in this field involves its ability to undergo polymerization reactions, forming long chains of repeating units. The mechanism of action in polymer production inv...
Synthesis and characterization of chitosan-g-poly(acrylic acid)/sodium humate superabsorbent A novel chitosan-g-poly(acrylic acid)/sodium humate (CTS-g-PAA/SH) multifunctional superabsorbent was prepared by graft polymerization among chitosan, acry... J Liu,W Qin,A Wang - 《Carbohydrate Polymers...