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HEAT CRACK [9 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-02-04

English

Subject field(s)
  • Chemical Elements and Compounds
  • Rubber
Universal entry(ies)
(C4H6)x
formula, see observation
DEF

A synthetic thermoplastic polymer made by polymerizing 1,3-butadiene with a stereospecific organometallic catalyst (butyl lithium), though other catalysts such as titanium tetrachloride and aluminum iodide may be used.

OBS

Oil-extendable synthetic elastomer polymer made from butadiene; resilience is similar to natural rubber; it is blended with natural rubber for use in tire and other rubber products.

CONT

The cis-isomer, which is similar to natural rubber, is used in tire treads due to its abrasion and crack resistance and low heat build-up. Large quantities are also used as blends in SBR rubber. The trans-isomer resembles gutta percha and has limited utility. Liquid polybutadiene, which is sodium-catalyzed, has specialty uses as a coating resin. It is cured with organic peroxides.

OBS

Also known under a large number of commercial designations, such as: Alfine; Budium RK 622; CB 10; Diene 35 NF; Dienite X 555; Dienite X 644; FCR 126; FCR 1261 (polymer); FCR 1261PD; Hystl; LCB 150; Polyoil 110; Polyoil 130; Quintol B 1000; S 820.

OBS

Chemical formula: (C4H6)x

French

Domaine(s)
  • Éléments et composés chimiques
  • Caoutchouc
Entrée(s) universelle(s)
(C4H6)x
formula, see observation
DEF

Nom générique des polymères du butadiène [...]

CONT

Le polybutadiène est souvent utilisé en mélange avec le caoutchouc naturel, auquel il confère une bonne résistance aux basses températures. Il est également associé au caoutchouc naturel et à divers élastomères synthétiques dans la fabrication de l'ébonite. C'est cependant par ses copolymères que le butadiène est essentiel : il donne avec le nitrile acrylique des copolymères appelés «caoutchoucs nitriles»; avec le styrène, des copolymères d'un très grand intérêt [...]; en association avec l'acrylonitrile et le styrène, des terpolymères appelés ABS.

OBS

Formule brute : (C4H6)x

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Caucho
Entrada(s) universal(es)
(C4H6)x
formula, see observation
OBS

Fórmula química: (C4H6)x

Save record 1

Record 2 2006-03-16

English

Subject field(s)
  • Types of Glass
DEF

Two sheets of plate glass with a sheet of transparent resinoid between, the whole molded together under heat and pressure; it will crack without shattering.

French

Domaine(s)
  • Sortes de verre
DEF

Verre composé de deux feuilles de verre collées sur une troisième feuille en matière plastique, l'âme, qui a pour fonction de retenir énergiquement les fragments de verre en cas de bris.

CONT

Les verres de sécurité sont de deux types, le verre sandwich et le verre trempé.

OBS

Pluriel : des sandwichs; des sandwiches.

OBS

sandwichs (pl.) : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).

Spanish

Save record 2

Record 3 2003-03-17

English

Subject field(s)
  • Space Physics
CONT

As these field lines move through the star's crust they should greatly heat it, consequently producing a lot of strain. Eventually this strain should cause the crust to crack, releasing a surge of magnetic energy which would interact with the tenuous particle atmosphere and produce copious soft gamma rays.

French

Domaine(s)
  • Physique spatiale

Spanish

Save record 3

Record 4 2001-08-22

English

Subject field(s)
  • Cutting and Trimming (Machine-Tooling)
CONT

A new process, "abrasive waterjet cutting", was created by the introduction of abrasive particles into the waterjet, greatly increasing capabilities. The addition of abrasives to the waterjet stream expands cutting capability to almost any material known to man and makes it one of the most versatile tools in use today.... Abrasive waterjet is rapidly finding use in cutting hard, dense material such as glass, composites, metals, and fired ceramics. These materials are difficult to cut by older, conventional processes because they tend to fray, crack, splinter, shatter, or show heat effects.

French

Domaine(s)
  • Découpage et taillage (Usinage)
CONT

Procédé de découpe au jet abrasif. La technique de la découpe au jet d'eau haute pression forme la base de la découpe au jet abrasif. L'eau sous pression est chargée de particules abrasives extrêmement fines (grenat, corindon et olivine par ex.). [...] À l'aide d'une buse canon en métal très dur, le jet d'eau additionné d'abrasif est focalisé sur la matière. Cette technique renforce l'énergie du jet et permet de séparer et de percer des matériaux très durs de différentes épaisseurs et résistances.

Spanish

Save record 4

Record 5 1999-12-20

English

Subject field(s)
  • Foundry Practice
DEF

A fracture that occurs as material components cool and solidify at different rates; thus exerting stresses upon each other.

Key term(s)
  • hot crack

French

Domaine(s)
  • Fonderie

Spanish

Save record 5

Record 6 1988-04-29

English

Subject field(s)
  • Types of Glass
CONT

If you’re going to project photographs, you should first adhere them to a piece of annealed glass that will not crack from heat. This will also keep the photographs flat.

OBS

anneal : To treat a metal, alloy, or glass with heat and then cool to remove internal stresses and to make the material less brittle.

French

Domaine(s)
  • Sortes de verre
CONT

Si vous avez l'intention de projeter des photographies, vous devez d'abord les coller sur une plaque de verre recuit supportant la chaleur. Ainsi, vous conserverez les photographies bien plates.

Spanish

Save record 6

Record 7 1986-07-15

English

Subject field(s)
  • Ornamental Glassware
  • Glass Manufacturing
DEF

The process of subjecting glass to heat and subsequent gradual and uniform cooling for the purpose of toughening the glass and making it less likely to crack or break.

CONT

The annealing is done in an annealing oven (lehr) that today is automatically controlled and through which the glass passes on a conveyor belt.

French

Domaine(s)
  • Verrerie d'art
  • Fabrication du verre
DEF

Opération qui consiste à refroidir progressivement le verre dans une arche pour éviter les tensions internes qui viendraient le briser.

Spanish

Save record 7

Record 8 1986-07-11

English

Subject field(s)
  • Braking Systems (Motor Vehicles and Bicycles)
CONT

Minor heat cracks can usually be machined out of the surface.

French

Domaine(s)
  • Freins (Véhicules automobiles et bicyclettes)
DEF

Petites crevasses causées par la température de freinage sur les disques ou les tambours de freins.

Spanish

Save record 8

Record 9 1985-05-09

English

Subject field(s)
  • Tracks and Roadways (Rail Transport)
DEF

Crack produced during heat treatment or cooling by non-uniform contraction of the workpiece.(OREU-79, no. 1003)(RAIL)

French

Domaine(s)
  • Voies ferrées
DEF

Fissuration provoquée dans le métal par les effets immédiats ou différés d'un chauffage ou d'un refroidissement. (OREU-79, n. 1003)

Spanish

Save record 9

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