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Glass transition, rubber-blend-toughened

According to Partridge [163], toughening is efficient when, by comparison to the neat homopolymer tested under the same conditions, the impact resistance is multiplied by a factor of 10, without losing more than 25% of stiffness. The upper temperature limit for the use of rubber-modified blends is controlled by the matrix melt temperature, Tm, their lower limit by the glass transition temperature, Tg, of the particles. As soon as the viscoelastic response of the latter is too slow to accommodate an external loading, the polymer assumes a glassy state and breaks in a brittle way. [Pg.73]

The well-known examples of blends are impact modified, toughened polymers, where polymers with different glass transition temperatures are blended, such as a rubber with a thermoplastic. Many other blends are known, such as barrier polymers for packaging, where specific polar or nonpolar polymers improve the properties of polymer blends, combined to increase the resistance against transport of water and a certain gas (oxygen, carbon dioxide, etc.), such as PA (barrier to oxygen) with a polyolefin (barrier to water vapor). [Pg.513]

Williams G, Watts DC (1970) Non-symmetrical dielectric relaxation behavior arising from a simple empirical decay function. Trans Faraday Soc 66 80-85 Williams ML, Landel RR, Ferry ID (1955) The temperature dependence of relaxation mechanisms in amorphous polymers and other glass-forming liquids. J Am Chem Soc 77 3701-3707 Wood LA (1958) Glass transition temperatures of copolymers. J Polym Sci 28 319-330 Wu SH (1985) Phase structure and adhesion in polymer blends a criterion for rubber toughening. Polymer 26 1855-1863... [Pg.126]


See other pages where Glass transition, rubber-blend-toughened is mentioned: [Pg.99]    [Pg.359]    [Pg.91]    [Pg.95]    [Pg.1043]    [Pg.48]    [Pg.34]    [Pg.71]    [Pg.74]    [Pg.75]    [Pg.1229]    [Pg.1235]    [Pg.1242]    [Pg.1271]    [Pg.1509]    [Pg.1767]    [Pg.101]    [Pg.601]    [Pg.417]    [Pg.221]   


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Blends rubber

Blends toughening

Glass-rubber

Rubber toughening

Rubber transition

Rubber-toughened

Rubber-toughened blends

Toughen

Toughen Toughening

Tougheners

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