Results 31 to 40 of about 122,896 (296)

The ring-opening polymerization of D,L-lactide in the melt initiated with tetraphenyltin [PDF]

, 1984
Melt polymerization conditions for D,L-lactide initiated with tetraphenyltin were studied with regard to polymer molecular weight and weight distributions.
Berg, J.W.A. van den, Feijen, J., Kohn, F.E., Ridder, G. van de   +3 more
core   +2 more sources

Testing of residual monomer content reduction possibility on acrilic resins quality [PDF]

Hemijska Industrija, 2011
Poly (methyl methacrylate) (PMMA) is material widely used in dentistry. Despite the various methods used to initiate the polymerization of acrylic resins, the conversion of monomer to polymer is not complete thus leaving some unreacted methyl ...
Kostić Milena, Krunić Nebojša, Nikolić Ljubiša, Nikolić Vesna, Najman Stevo, Kostić Ivan, Rajković Jelena, Manić Miodrag, Petković Dušan   +8 more
doaj   +1 more source

The Buoyant Behavior of Viral and Bacterial DNA in Alkaline CsCl [PDF]

, 1963
In equilibrium density gradient centrifugation, the banding polymer species is electrically neutral. The banding species for a negative polyelectrolyte with a polyanion P_(n)^(-z)n (where n is the degree of polymerization, and z the titration charge per
Davidson, Norman, Dove, William F., Jr., Morris, Janet, Vinograd, Jerome   +3 more
core   +1 more source

Double walled carbon nanotube/polymer composites via in-situ nitroxide mediated polymerisation of amphiphilic block copolymers [PDF]

, 2004
Because of their unique physical, chemical, and structural properties, carbon nanotubes (CNT) are playing an increasingly important role in the development of new engineering materials [1].
Billon, Laurent, Dagréo, Sylvie, Datsyuk, Vitaliy, Dupin, Jean-Charles, Flahaut, Emmanuel, Guerret-Piécourt, Christelle, Laurent, Christophe, Peigney, Alain   +7 more
core   +3 more sources

Isohexide and sorbitol-derived, enzymatically synthesized renewable polyesters with enhanced Tg [PDF]

, 2016
Sugar-based polyesters derived from sorbitol and isohexides were obtained via solvent-free enzymatic catalysis. Pendant hydroxyl groups, coming from the sorbitol units, were present along the polyester backbone, whereas the two isohexides, namely ...
Gustini, Liliane, Koning, Cor, Lavilla, Cristina, Martínez de Ilarduya Sáez de Asteasu, Domingo Antxon, Muñoz Guerra, Sebastián   +4 more
core   +2 more sources

Copper(0)-mediated radical polymerisation in a self-generating biphasic system [PDF]

, 2013
Herein, we demonstrate the synthesis of well-defined poly(n-alkyl acrylate)s via copper(0)-mediated radical polymerisation in a self-generating biphasic system. During the polymerisation of n-butyl acrylate in DMSO, the polymer phase separates to yield a
Amir Atme, Athina Anastasaki, Biedroń, Boyer, Boyer, Carmichael, Christopher Waldron, Ciampolini, Contel, Cyrille Boyer, D'Hooge, David Haddleton, Ding, Faucher, Grimes, Haddleton, Haddleton, Haddleton, Haddleton, Hong, Jakubowski, Kamigaito, Kickelbick, Konkolewicz, Levere, Lou, Matyjaszewski, Matyjaszewski, Michael R. Whittaker, Mohan, Mueller, Mueller, Nguyen, Nguyen, Nguyen, Nguyen, Nguyen, Noda, Nystroem, Otazaghine, Paul Wilson, Per B. Zetterlund, Percec, Perreault, Pintauer, Pintauer, Popescu, Ragagnin, Sarbu, Shen, Silverstein, Soeriyadi, Tsarevsky, Wright   +53 more
core   +1 more source

EVALUATION OF THE MECHANICAL PROPERTIES AND RESIDUAL MONOMER CONTENT OF COPOLYMER ACRYLIC RESINS POLYMERIZED BY DIFFERENT METHODS

Selcuk Dental Journal, 2018
Background:The aim of this study was to evaluate the effect of adding four different monomers on the flexural strength, elastic modulus, impact strength and residual monomer content of denture base resins polymerized by copolymerization mechanism.Methods:
Ayşegül Köroğlu, Onur Şahin, Doğu Ömür Dede, Şeyda Adıgüzel, Baki Hazer   +4 more
doaj   +1 more source

Safety assessment of the substance dimethyl carbonate for use in food contact materials [PDF]

, 2017
Publisher ...
Bolognesi, Claudia, Castle, Laurence, Cravedi, Jean-Pierre, Croera, Cristina, EFSA Panel on Food Contact Materials Enzymes, Flavourings and Processing Aids (CEF), Engel, Karl-Heinz, Fowler, Paul, Franz, Roland, Grob, Konrad, Gürtler, Rainer, Husøy, Trine, Kolf-Clauw , Martine, Kärenlampi, Sirpa, Lampi, Eugenia, Mennes, Wim, Milana, Maria Rosaria, Penninks, André, Silano, Vittorio, Smith, Andrew, Svensson, Kettil, Tavares Poças, Maria de Fátima, Tlustos, Christina, Wölfle, Detlef, Zorn, Holger, Zugravu, Corina-Aurelia   +24 more
core   +3 more sources

A novel treatment and derivatization for quantification of residual aromatic diisocyanates in polyamide resins

Scientific Reports, 2022
In the scientific context, the environmental and healthy impact of polymers is more related to the residual monomer content rather than their macromolecular structure, due to the monomer capability to interact with membrane cells. For this a novel method
Genny Pastore, Serena Gabrielli, Ezio Leone, Manuela Cortese, Dario Gentili, Giovanna Biondi, Enrico Marcantoni   +6 more
doaj   +1 more source

Block copolymers of poly(L-lactide) and poly(ε-caprolactone) or poly(ethylene glycol) prepared by reactive extrusion [PDF]

, 1996
Blends of poly(L-lactide) (PLLA) and poly(-caprolactone) (PCL) were prepared in a co-rotating twin screw miniextruder (40 rpm, 200°). It was attempted to prepare multiblock copolymers by allowing a controlled number of transesterification reactions ...
Bernard, A., Dijkstra, P.J., Feijen, J., Stevels, W.M., Witte, P. van de   +4 more
core   +3 more sources