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Network force-temperature relations

Force-temperature relations lead to a quantitative assessment of the relative amounts of entropic and energetic components of the elasticity of the network. [Pg.185]

Because the two states available to a polymer network can co-exist in a macroscopic sample, unique thermoelastic coefficients are observed. The coefficients of interest are those of force-temperature and of length-temperature. These are related to each other by the identity... [Pg.371]

Ammonia adsorption was studied on several activated carbons with different textural and chemical characteristics by flow adsorption microcalorimeter. The textural and chemical nature of the samples was measured by N2 and CO2 adsorption and temperature programmed desorption (TPD-MS) respectively. The ammonia adsorption consists in reversible (related to physisorption) and irreversible (related to chemisorption on chemical groups) components. From the molar heats of adsorption it can be concluded that the samples have a wide distribution of acidic sites some of which are very strong. However, they are not always easily accessible to ammonia because constrictions in the pore-network hinder the access, forcing the adsorbed molecules to re-arrange. [Pg.239]

The integration of Eq. (8.17) between specified limits leads to a relation between the equilibrium tensile force, /eq, and the melting temperature. This is analogous to integrating the Clapeyron equation for vapor-liquid equilibrium. In this case, if the equation of state relating the pressure and volume of the Uquid is known, the dependence of the pressure on temperature is obtained. For the present problem the equation of state relating the apphed force to the length of the network is required. This information can be obtained from the theory of rubber elasticity.(6-9)... [Pg.363]

The relations between the force, length and temperature when conditions are varied so that the fiber traverses the two-phase region, are also illustrated in this figure. Consider, for example, a network that is maintained under conditions... [Pg.368]

See other pages where Network force-temperature relations is mentioned: [Pg.183]    [Pg.366]    [Pg.368]    [Pg.249]    [Pg.458]    [Pg.436]    [Pg.86]    [Pg.182]    [Pg.369]    [Pg.36]    [Pg.147]    [Pg.111]    [Pg.215]    [Pg.84]    [Pg.203]    [Pg.286]    [Pg.326]    [Pg.107]    [Pg.309]    [Pg.285]    [Pg.286]    [Pg.973]    [Pg.201]    [Pg.125]    [Pg.576]    [Pg.7]    [Pg.336]    [Pg.20]    [Pg.363]    [Pg.394]    [Pg.158]    [Pg.90]    [Pg.1570]    [Pg.167]    [Pg.198]    [Pg.2]    [Pg.384]    [Pg.18]    [Pg.845]    [Pg.369]   
See also in sourсe #XX -- [ Pg.358 ]



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Force-temperature relations

Relation network

Temperature network

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