Surprising properties of the kinematic shear viscosity of water

Bulavin, L. A.; Fisenko, Anatoliy I.; Malomuzh, N. P.

doi:10.1016/j.cplett.2008.01.028

Cited by 50 publications

(42 citation statements)

References 5 publications

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“…Порiв-нюючи залежностi концентрацiї вiд температури при сталому маркомолекулярному радiусi для си-стем ПВС-ДМСО i ПВС-вода, можна припустити, що вказанi змiни властивостей системи ПВС-вода зумовленi змiною властивостей розчинника -во-ди. Як показано у роботах [16,17], при темпера-турi 42 ∘ C (317 К) у водi вiдбувається динамiчний фазовий перехiд, за якого має мiсце суттєва змiна характеру теплового руху молекул води та пере-розподiл водневих зв'язкiв.…”

Section: обговорення результатIвunclassified

Effective Radii of Macromolecules in Dilute Polyvinyl Alcohol Solutions

Khorolskyi¹

2018

Ukr. J. Phys.

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ЕФЕКТИВНI РАДIУСИ МАКРОМОЛЕКУЛ У РОЗБАВЛЕНИХ РОЗЧИНАХ ПОЛIВIНIЛОВОГО СПИРТУ УДК 532.13, 544.777 На основi експериментальних даних в'язкостi розбавлених розчинiв полiвiнiлового спир-ту (ПВС) у диметилсульфоксидi (ДМСО) та водi за допомогою теорiї зсувної в'язкостi розчинiв макромолекул Маломужа-Орлова дослiджуються температурнi та концен-трацiйнi залежностi ефективних радiусiв макромолекул полiвiнiлового спирту. Пока-зано, що в iнтервалi температур 293-353 К температурнi залежностi ефективних ра-дiусiв макромолекул ПВС у ДМСО мають лiнiйний характер, тодi як у водних розчинах ПВС такi залежностi є бiльш складними: за вiдносно низьких температур i концен-трацiй величини ефективних радiусiв макромолекул залишаються незмiнними, а зро-стання температури i концентрацiї призводить до нелiнiйного зменшення ефективних радiусiв макромолекул. Концентрацiйнi залежностi ефективних радiусiв макромолекул в обох розчинниках для iнтервалу концентрацiй 0,3-3 мас.% носять нелiнiйний спадний характер.К л ю ч о в i с л о в а: розчин полiвiнiлового спирту, ефективний радiус макромолекули, ди-метилсульфоксид, теорiя Маломужа-Орлова.

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Section: обговорення результатIвunclassified

Effective Radii of Macromolecules in Dilute Polyvinyl Alcohol Solutions

Khorolskyi¹

2018

Ukr. J. Phys.

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“…For T > T H the thermal motion in water tends to the argon-like motion. Additional arguments in favor of this statement are given in [14,15]. They are based on the temperature dependences of the kinematic shear viscosity [14] and the entropy diameter [15] (the latter is similarly determined by the well known diameter of the of the coexistence curve:…”

Section: Water Structure According To the Data Of Dipole Relaxation Amentioning

confidence: 99%

“…which is characteristic of activation theory in the crystal-like region of the thermal motion of molecules [9] (here In order to correctly understand the physical meaning of parameters in (1), let us additionally discuss the temperature dependence of the kinematic shear viscosity ν w (t), which was analyzed in detail in [14]. It is shown there that ν w (t) is the temperature function that can be considered as the sum…”

Section: H Ohmentioning

confidence: 99%

Cluster structure of water in accordance with the data on dielectric permittivity and heat capacity

Malomuzh

Makhlaichuk

et al. 2013

J Struct Chem

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In the work the character of water clusterization in the whole existence domain of its liquid state is discussed: from supercooled states to the critical point. Conclusions about the cluster composition of liquid water are drawn based on the analysis: 1) of the features of dielectric relaxation; 2) character of the temperature dependence of its static dielectric permittivity, and 3) the value and temperature dependence of different contributions to the heat capacity of the system. It is shown that near the water crystallization point tetramers prevail in its structure, with an increase in the temperature trimers start to play the main role, and near the critical point of water dimers become the major associates. At temperatures near the water crystallization point the obtained results well agree with the data on emission and absorption X-ray spectroscopy.

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“…At the same time, the temperature dependence of the heat capacity of water [17] undoubtedly testifies to the necessity to consider the contributions made by hydrogen bonds (the energy of these bonds is about (1.5÷3)k B T tr ). A new view on the character of the intermolecular interaction also follows from the systematization of liquids proposed by Leonid Bulavin [18] (see also works [19][20][21]). …”

Section: Introductionmentioning

confidence: 99%

Physical Nature of Hydrogen Bond

Zhyganiuk

Malomuzh

2015

Ukr. J. Phys.

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PHYSICAL NATURE OF HYDROGEN BOND PACS 82.30.RsThe physical nature and the correct definition of hydrogen bond (H-bond) are considered. The influence of H-bonds on the thermodynamic, kinetic, and spectroscopic properties of water is analyzed. The conventional model of H-bonds as sharply directed and saturated bridges between water molecules is incompatible with the behavior of the specific volume, evaporation heat, and self-diffusion and kinematic shear viscosity coefficients of water. On the other hand, it is shown that the variation of the dipole moment of a water molecule and the frequency shift of valence vibrations of a hydroxyl group can be totally explained in the framework of the electrostatic model of H-bond. At the same time, the temperature dependences of the heat capacity of water in the liquid and vapor states clearly testify to the existence of weak H-bonds. The analysis of a water dimer shows that the contribution of weak H-bonds to its ground state energy is approximately 4-5 times lower in comparison with the energy of electrostatic interaction between water molecules. A conclusion is made that H-bonds have the same nature in all other cases where they occur.K e y w o r d s: hydrogen valence vibrations of a water molecule, frequency shift, hydrogen bond, electrostatic origin.The hydrogen bond is a phlogiston of the 20-th century. L. BULAVIN

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Surprising properties of the kinematic shear viscosity of water

Cited by 50 publications

References 5 publications

Effective Radii of Macromolecules in Dilute Polyvinyl Alcohol Solutions

Effective Radii of Macromolecules in Dilute Polyvinyl Alcohol Solutions

Cluster structure of water in accordance with the data on dielectric permittivity and heat capacity

Physical Nature of Hydrogen Bond

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