نتایج جستجو برای: flory theories
تعداد نتایج: 115585 فیلتر نتایج به سال:
Linear 1,2-polybutadiene is crosslinked at 0 degrees by gamma-irradiation while strained in simple extension, with extension ratios from 1.3 to 2.0. During irradiation times up to several hours, entanglement slippage is slight, since the temperature is only slightly above the glass transition. Subsequently, samples are released and reach their equilibrium states of ease at room temperature. Fro...
We report on the self-assembly behaviour of two homologue series of rod-coil block copolymers in which, the rod, a pi -conjugated polymer, is maintained fixed in size and chemical structure, while the coil is allowed to vary both in molecular weight and chemical nature. This allows maintaining constant the liquid crystalline interactions, expressed by Maier-Saupe interactions, omega , while var...
Effectiveness of furfural as an organic inhibitor in 5 percent hydrochloric acid which is used in acid pickling of steel was evaluated. Lungmuir, Frumkin and Flory-Huggins isotherms [1, 2] were used to determine the parameters of effective adsorption, free energy and entropy of adsorption. Furfural indicated an inhibition less than 17 percent in concentrations of 0.001 mole per liter for a dura...
abstract target-oriented approaches to translation studies are regarded as recent theories of translation. one of the most famous theories among these approaches is descriptive translation studies presented by toury (1995). this theory gives a new dimension to translation studies and gives importance to the descriptive rather than prescriptive studies. it also identifies three sets of transla...
Kathryn L. Stone, Robert D. Bjornson, Gregory G. Blasko, Can Bruce, Renee Cofrancesco, Nicholas J. Carriero, Christopher M. Colangelo, Janet K. Crawford, J. Myron Crawford, Nancy C. daSilva, Joseph D.Deluca, James I. Elliott, Margaret M. Elliott, P. John Flory, Ewa J. Folta-Stogniew, Erol Gulcicek, Yong Kong, TuKiet T. Lam, Ji Y. Lee, Aiping Lin, Mary B. LoPresti, Shrikant M. Mane, Walter J. Mc...
ethylene was homopolymerized over ziegler-natta catalyst and the homopolymerization was modeled using moment equations. mechanism was modeled according to five different reaction centers of catalyst. for each center, there are different reaction rate coefficients; therefore the final product of each center would be expected to be different. modeling results showed good conformity to the experim...
The one dimensional direct polymer in random media model is investigated using a variational approach in the replica space. We demonstrate numerically that the stable point is a maximum and the corresponding statistical properties are for the delta correlated potential in good agreements with the known analytic solution. In the case of power-law correlated potential two regimes are recovered: a...
We report measurements of the bulk modulus of individual poly(N-isopropylacrylamide) microgels along their swelling transition. The modulus is determined by measuring the volume deformation of the microgel as a function of osmotic pressure using dextran solutions. We find that the modulus softens through the transition, displaying a nonmonotonous behavior with temperature. This feature is corre...
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