TERMIUM Plus®

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POLYMER SIZE [9 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2021-03-11

English

Subject field(s)
  • Chemical Elements and Compounds
  • Wastewater Treatment
  • Water Treatment (Water Supply)
CONT

A synthetic organic anionic polymer is used in addition to chemical coagulants to bring smaller particles together thereby increasing their size and further enhancing clarification.

French

Domaine(s)
  • Éléments et composés chimiques
  • Traitement des eaux usées
  • Traitement des eaux
CONT

Outre les coagulants chimiques, un polymère anionique organique synthétique est utilisé pour provoquer l'agglomération des particules plus petites, augmentant ainsi leur taille pour améliorer le procédé de clarification.

Spanish

Save record 1

Record 2 2012-10-04

English

Subject field(s)
  • Scientific Measurements and Analyses
DEF

Distance from the elements of the polymer chain to its center of gravity.

CONT

Determination of polymer size has been addressed... mathematically and experimentally.... The mathematical relationship employs two parameters :... the mean end to end distance, and... the mean radius of gyration.

French

Domaine(s)
  • Mesures et analyse (Sciences)
OBS

[...] on s'attend à ce que l'épaisseur de la couche adsorbée [...] soit de l'ordre de grandeur du rayon de giration de la macromolécule pour un polymère monodispersé [...]

Spanish

Save record 2

Record 3 2011-04-08

English

Subject field(s)
  • Trade Names
  • Plastic Materials
OBS

Tradename for a series of fine particle size styrene-and acrylic-based polymer and copolymer emulsions...

OBS

Ubatol™: A trademark of Cray Valley.

Key term(s)
  • Ubatol

French

Domaine(s)
  • Appellations commerciales
  • Matières plastiques
OBS

UbatolMC : Marque de commerce de la société Cray Valley.

Spanish

Save record 3

Record 4 - external organization data 2002-02-25

English

Subject field(s)
  • Chemistry
  • Compartment - Canadian Nuclear Safety Commission
CONT

Especially designed or prepared assemblies and components for use in gaseous diffusion enrichment, including :... Gaseous diffusion barriers(a) especially designed or prepared thin, porous filters, with a pore size of 100 Å to 1 000 Å(angstroms), a thickness of 5 mm(0. 2 in.) or less, and for tubular forms, a diameter of 25 mm(1 in.) or less, made of metallic, polymer or ceramic materials resistant to corrosion by UF6...

OBS

Regulation cited: Nuclear Non-Proliferation Import and Export Control Regulations.

French

Domaine(s)
  • Chimie
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Assemblages et composants spécialement conçus ou préparés pour utilisation dans l'enrichissement par diffusion gazeuse, notamment : [...] Barrières de diffusion gazeuse a) filtres (minces) et poreux spécialement conçus ou préparés, qui ont des pores d'un diamètre de 100 Å à 1 000 Å (angströms), une épaisseur égale ou inférieure à 5 mm (0,2 po) et, dans le cas des formes tubulaires, un diamètre égal ou inférieur à 25 mm (1 po) et sont constitués de matériaux métalliques, polymères ou céramiques résistant à la corrosion par l'UF6 [...]

OBS

Règlement cité : Règlement sur le contrôle de l'importation et de l'exportation aux fins de la non-prolifération nucléaire.

Spanish

Save record 4

Record 5 1998-02-24

English

Subject field(s)
  • Plastics Manufacturing
CONT

The solids conveying in the feed hopper is generally a gravity flow of particulate polymer; the material moves down the feed hopper by its own weight. Unfortunately, this does not always work without problems. Some materials have poor bulk flow characteristics and may get stuck in the feed hopper. This problem is called arching or bridging. It is likely to occur when the particle shape is irregular, when the particle size is small, and when the internal friction of the bulk material is high.

French

Domaine(s)
  • Plasturgie

Spanish

Save record 5

Record 6 1990-05-03

English

Subject field(s)
  • Industrial Tools and Equipment
  • Plastic Materials
CONT

The size of the system(polymizer) is dependant on the volume of polymer required to supply the clarifier, paper machine, etc.

French

Domaine(s)
  • Outillage industriel
  • Matières plastiques

Spanish

Save record 6

Record 7 1989-12-18

English

Subject field(s)
  • Biological Sciences
CONT

The gel entrapment method involves entrapping of the enzymes within the interstitial spaces of crosslinked water insoluble polymer gels.... The usual method of gel formation is to polymerize acrylamide in an aqueous solution of the soluble enzyme and a crosslinking agent such as N, N-methylenebis(acrylamide). The resulting gel block can be mechanically dispersed into particles of desired size. The broad distribution of pore size of the gel inevitably results in leakage of the entrapped enzyme even after prolonged washing whilst the generation of free radicals in the course of the reaction may affect the activity of the entrapped enzymes.

OBS

See record "entrapment".

French

Domaine(s)
  • Sciences biologiques
CONT

Les enzymes sont en général immobilisées soit par fixation covalente sur un support membranaire, soit par utilisation d'un agent de pontage qui provoque la réticulation des molécules de protéine active ou la coréticulation de l'enzyme avec une protéine inerte. Les techniques d'inclusion dans un gel ou de confinement d'enzymes en solution sont progressivement remplacées pas les méthodes chimiques d'immobilisation. Les capteurs sont le plus souvent de type électrochimique.

Spanish

Save record 7

Record 8 1988-04-30

English

Subject field(s)
  • Oil Production
CONT

Investigations to determine pore size of reservoir media have shown the smaller pores to be of the same magnitude as the polymer molecule. A mercury porosimeter test... on a Berea sandstone showed about 14% of the pore volume to be less than 1 micron in diameter...

French

Domaine(s)
  • Production pétrolière
CONT

[...] les laboratoires pétroliers se sont intéressés aux solutions de polymère en tant que fluide de balayage de l'huile en place dans les réservoirs [...] de nombreuses études [ont porté] sur l'écoulement en milieu poreux dans des conditions où la taille des macromolécules n'est pas négligeable par rapport aux dimensions des pores.

Spanish

Save record 8

Record 9 1988-04-30

English

Subject field(s)
  • Oil Production
CONT

To better understand the roles of adsorption, inaccessible pore volume and entrapment, comprehension of polymer size and pore size is necessary. Determination of polymer size has been addressed... mathematically and experimentally... Gogarty concluded that the effective size of polymer units was between 0. 45-0. 8 microns.

French

Domaine(s)
  • Production pétrolière
CONT

[...] de très nombreuses études sur l'écoulement en milieu poreux dans des conditions où la taille des macromolécules n'est pas négligeable par rapport aux dimensions des pores [...] ont permis [...]

OBS

[...] le comportement rhéoépaississant aux grandes vitesses [...] ne [dépend] pas des dimensions relatives macromolécules-pore [...]

Spanish

Save record 9

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