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Solvent crazing

Solvent crazing resistance Enhances Enhances Initially remains unchanged then deteriorates Enhances Deteriorates... [Pg.656]

Concentration-independent diffusion only occurs at low temperatures and/or low penetrant "activities". At high penetrant activities over a range of temperatures well below Tg the transport of penetrant into the polymer is accompanied by solvent crazing or cracking the osmotic stresses produced by the penetrant are sufficiently large to cause local fracture of the material. [Pg.695]

According to MacNulty (1974), failure by solvent crazing occurs by brittle fracture, even when the failure is slow. Always a small liquid penetration zone appears to initiate the break. [Pg.867]

The foregoing considerations about the mechanism of solvent cracking and solvent crazing suggest that the solubility parameter difference, as a quantitative measure of the interaction between polymer and solvent, will play an important part in these phenomena. [Pg.867]

So attempts to correlate solvent cracking and solvent crazing with solvent properties lead to the same conclusion as was drawn in Chap. 7 for the solubility of polymers, viz. that besides the solubility parameter at least one other solvent property must be taken into account. The method proposed by Vincent and Raha is one of several possible two-dimensional correlation methods. [Pg.869]

Kefalas VA (1995) Solvent crazing as a stress-induced surface adsorption and bulk plasticization effect. J Appl Polym Sci 58(4) 711-717... [Pg.148]

Kramer EJ, Bubeck RA (1978) Growth kinetics of solvent crazes in glassy polymers. J Polym Sci Polym Phys 16(7) 1195-1217... [Pg.148]

Kambour RP, Gruner CL, Romagosa EE (1973) Solvent crazing of dry polystyrene and dry crazing of plasticized polystyrene. J Polym Sci Polym Phys 11 (10) 1879—1890... [Pg.149]

The plots show that in both cases the craze stress S (x) is almost constant (quoted a,) along the craze, and is about 40% lower for the toluene gas graze. Again, comparison with liquid solvent crazes show that in liquids the craze stress drops to much lower values that in the low pressure solvent vapor. [Pg.255]

Crazing and fracture caused by absorbed liquids and vapours is one of the most serious limitations on the use of plastics in engineering applications. The terms solvent crazing and environmental stress cracki are... [Pg.198]

Crazing caused in earfy plastic picnic ware by the cream layer on milk led to the replacement of polystyrene ly the more eaqrensive SAN copolymer. Margarine containers are made fiom ABS (rubber-toughened SAN) for similar reasons. Recent concerns about solvent crazing have centred mmnfy upon the effects of fuel and oils on plastic components in cars. [Pg.230]

Polysulfone has a second, low-temperature glass transition at — 101°C similar to other tough, rigid thermoplastic polymers. These polymers also resist aqueous acid and alkaline environments. Properties such as physical aging and solvent crazing can be improved by annealing the parts. This also reduces molded-in stresses. [Pg.447]

A. L. Volynskii and N. F. Bakeev, Solvent Crazing of Polymers, Elsevier, New York, 1995. [Pg.7422]

See other pages where Solvent crazing is mentioned: [Pg.48]    [Pg.137]    [Pg.221]    [Pg.867]    [Pg.867]    [Pg.867]    [Pg.867]    [Pg.867]    [Pg.321]    [Pg.301]    [Pg.304]    [Pg.348]    [Pg.267]    [Pg.456]    [Pg.48]    [Pg.1069]    [Pg.1072]    [Pg.344]    [Pg.460]    [Pg.499]    [Pg.374]    [Pg.375]    [Pg.404]    [Pg.415]    [Pg.209]    [Pg.106]    [Pg.2208]    [Pg.82]    [Pg.118]    [Pg.212]    [Pg.52]    [Pg.48]   
See also in sourсe #XX -- [ Pg.304 ]

See also in sourсe #XX -- [ Pg.23 , Pg.198 , Pg.199 , Pg.404 ]

See also in sourсe #XX -- [ Pg.182 , Pg.358 ]

See also in sourсe #XX -- [ Pg.291 ]



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Craze

Solvent crazing resistance

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