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Перевод: elastomer

эластомер

Тезаурус:

1. Flysheet fabric: ripstop nylon with silicon elastomer coating which waterproofs both sides of the fabric and makes it more tear resistant.
2. For example, in situations requiring the selection of elastomers for use as hose-pipes or gaskets, the correct choice of elastomer is of prime importance, as contact with highly compatible fluids may cause serious swelling and impair the operation of the system.
3. It is now clear, however, that the polymer is stored in cells as a mobile elastomer.
4. The initial, almost instantaneous, elongation produced by the application of the tensile stress is inversely proportional to the rigidity or modulus of the material, i.e. an elastomer with a low modulus stretches considerably more than a material in the glassy state with a high modulus.
5. For short periods of stress in an amorphous elastomer, the entanglement and intertwining of chains with their neighbours acts as a physical restraint to excessive chain movement and the elastomer regains its original length when the stress is removed.
6. When water diffuses into an elastomer the water droplets form impurity sites.
7. This means that at 300 K polyisoprene is likely to exhibit rubber-like behaviour and be useful as an elastomer, whereas poly (methyl methacrylate) will be a glassy material.
8. This is highlighted when comparing the amorphous elastomeric cis-polyisoprene with the highly crystalline trans-polyisoprene which has no virtue as an elastomer, or cis-poly(1,3-butadiene) , with trans-poly(1,3-butadiene), .
9. The ability of an elastomer to regain its former size, when extensions of up to 400 per cent have been experienced, is associated with the long chain character of the material.
10. This almost led to grounding of the plane but replacement with an incompatible elastomer made from ethylene-propylene copolymer rectified the fault.
11. The wrong selection can have far reaching consequences; the initial choice of an elastomer for the seals in the landing gear of the DC-8 aircraft resulted in serious jamming because the seals become swollen when in contact with the hydraulic fluid.
12. Most ophthalmic research stems from these two carbon backbone polymers and an elastomer, silicone rubber, which is based on the poly (dimethyl siloxane) heterochain structure.