Results 241 to 250 of about 122,896 (296)

Chromatographic determination of residual monomer content in polyfluoroacrylates

Fibre Chemistry, 1990
Some features of the gas-chromatographic analysis of residual monomers in polyfluoroacrylates have been studied. Procedures have been developed for the quantitative determination of residual monomers in homopolymers and copolymers.
T. I. Baskakova, T. A. Krendeleva, M. B. Smelovskaya, N. I. Maksakova   +3 more
openaire   +1 more source

Catalytic reduction of residual styrene monomer in polystyrene

Journal of Applied Polymer Science, 2001
AbstractStyrene monomer has a low taste and odor threshold, and its presence in the polystyrene used in food packaging applications must be as low as possible. Conventional devolatilization technology does not lower styrene contents to desired levels, so special costly devolatilization techniques have to be used.
Yongsin Kim, H. James Harwood, Duane Priddy   +2 more
openaire   +1 more source

The usage period of dentures and their residual monomer contents

The Journal of Prosthetic Dentistry, 1992
The quantity of residual monomer content in 24 maxillary dentures was detected by gas liquid chromatography. The residual monomer contents tended to be lower in dentures used for long periods than in those used for short periods. Decreases in the quantities of residual monomer in acrylic resin dentures as a result of aging can be expressed in a ...
S, Sadamori, H, Kotani, T, Hamada
openaire   +2 more sources

Residual styrene monomer in chilean foods by headspace gas chromatography

Bulletin of Environmental Contamination and Toxicology, 1986
Dosage des residus de styrene monomere dans les aliments et dans les emballages de polystyrene. Etude des variations de ces taux en fonction du temps de conservation dans les emballages plastiques (migration du styrene)
I, Santa María, J D, Carmi, A G, Ober
openaire   +2 more sources

Effect of residual monomer on the spectroscopic properties of polythiophenes

Chemical Communications, 2006
The addition of some small molecules can red shift UV-Visible absorption and quench the fluorescence of poly(3-octadecylthiophene).
Wang, Yu, Mills, Ashley A., Euler, William B., Lucht, Brett L.   +3 more
openaire   +3 more sources

Minimization of the inevitable residual monomer in denture base acrylic

Dental Materials, 2005
Residual monomer ([MMA](R)) in denture base acrylic continues to be of concern. The response surface of concentration vs. time and temperature for the equilibration of methyl methacrylate (MMA) and its polymer (PMMA) allows a prediction of the time to the minimum at any temperature for a closed system.
C Y K, Lung, B W, Darvell
openaire   +2 more sources

Some observations on the determination of monomer residues in foods

Food and Cosmetics Toxicology, 1977
Abstract The effects of various experimental parameters on the determination by headspace gas chromatography of residues of vinyl chloride and of acrylonitrile in foods were examined. Preliminary investigations on the choice of solvent, the effects of varying duration and temperature of storage and the ratio of headspace to solvent volume are ...
J C, Chudy, N T, Crosby
openaire   +2 more sources

RP-LC Determination of Residual Monomers in Polycarboxylate Superplasticizers

Chromatographia, 2011
A procedure was developed for the determination of residual monomers in polycarboxylate superplasticizer by reversed-phase high performance liquid chromatography. Seven kinds of residual monomers were quantitatively determined on a SinoChrom ODS-BP (C18) column and UV detector at 205 nm.
Jiaheng Lei, Xiaodi Du, Anfu Zhang, Hui Wu   +3 more
openaire   +1 more source

Removal of Residual Monomers from Polymers in Fluidized Beds

Industrial & Engineering Chemistry Research, 2003
We present a model for the removal of residual monomers or “purging” from polymers in fluidized beds. The purging is modeled as a diffusion-controlled process. To track the diffusion of the monomer from the polymer, the diffusion equation is solved by the method of lines coupled with the isothermal mass balance equations for either batch or ...
M. Colakyan, R. S. Eisinger
openaire   +1 more source

The lomor process: A solution for residual monomers?

Radiation Physics and Chemistry (1977), 1979
Abstract Regulatory activity over the last several years has addressed the potential problems associated with the migration of residual monomers from a number of commodity food packages. The “Acrylonitrile Decision” (FDA Docket No. 76N-0070, September 23, 1977) illuminated the issue, and has been a cause for continued debate.
openaire   +1 more source