Parameters of the Alfrey-Price and taft equations

Kodolov, V.I.; Spasskii, S.S.

doi:10.1016/0032-3950(76)90100-3

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…where M i is the monomer concentration, mol L −1 , and r xy is the monomer reactivity ratio in the process of chain initiation, chain growth, and chain termination (it can be obtained by Q–e values of Alfrey–Price); we can draw a conclusion in Table that the results measured by infrared spectroscopy and the designed monomers ratios are basically consistent.…”

Section: Resultsmentioning

confidence: 60%

Microscopic morphology, rheological behavior, and mechanical properties of polymers: Recycled acrylonitrile‐butadiene‐styrene/polybutylene terephthalate blends

Zhan

Zhu

et al. 2019

J of Applied Polymer Sci

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In this study, styrene‐acrylonitrile‐glycidyl methacrylate (SAG) series copolymers were specially designed for producing the recycled acrylonitrile‐butadiene‐styrene (rABS)/poly(butylene terephthalate) (PBT)/SAG blends, which were prepared through the process of continuous melt blending and batch feeding. The effects of viscosity composition, SAG chemical composition, and SAG content on the morphology, and rheological and mechanical properties of the blends have been investigated. As demonstrated by morphological observation, the variety of viscosity composition of the blends affects the size of dispersed PBT droplets. Moreover, high viscosity of rABS matrix seems to facilitate the formation of smaller dispersed phase size of blends. Various SAG chemical compositions have different stabilities on the morphology of the blends, which affects the deformation, fragmentation, and coalescence of dispersed phase droplets. In addition, a finer phase morphology can be achieved when the density distribution of epoxy group is optimal in SAG copolymer. Rheological characterization manifested that the rheological properties of the blends depends strongly on its composition and structure, while the crosslinking degree is associated with the concentration of reactive groups and extent of reaction. Thereby, the rheological behavior of the blends during processing can be controlled by changing the reactive sequence and adding the quantity of epoxy group. The test on mechanical properties verified that a recycled product with excellent performance can be obtained by altering processing methods and the blends formula, which may be further applied to the 3D printing materials required by fused deposition modeling technology. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48310.

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Section: Resultsmentioning

confidence: 60%

Microscopic morphology, rheological behavior, and mechanical properties of polymers: Recycled acrylonitrile‐butadiene‐styrene/polybutylene terephthalate blends

Zhan

Zhu

et al. 2019

J of Applied Polymer Sci

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“…where values a and b -parameters, which correct the influence polar and steric (spaced) effects on reactivity in polymerization, the relation (ε 0 -ε)/ε 0 [3,4] correspondents to Taft constant σ (polarity constant), and the relation (V 0 -V)/V 0 -Taft constant E s (steric or spaced constant) [3] .…”

Section: Discussionmentioning

confidence: 99%

“…For the relative energetic parameters the following formula (εε 0 )/ε 0 is proposed [3] , where ε 0 corresponds to the surface energy for standard chemical fragment. In turn, analogous relative parameters are proposed [4] for the volume characteristics (V-V 0 )/V 0 .…”

Section: Introductionmentioning

confidence: 99%

Opinion: Chemical--Mesoscopics..for the Mesoparticles Reactivity Explanation

Kodolov

Chukhontseva

2020

non-met. mater. sci.

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The estimation of chemical particles reactivity and the determination of chemical reactions direction are the actual theme in new scientific trend – Chemical Mesoscopics. Paper includes the proposal about the using the theory of free energy linear dependence from physical organic chemistry and their applications for prognosis of reactions flowing. The semi-empiric constants is given according to mesoscopic physics definitions as well as the transformed Kolmogorov–Avrami equation is discussed. It is the development of Chemical Mesoscopics for organic reactivity estimation including nanostructures reactivity.

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“…For the relative energetic parameters the following formula (ε-ε 0 )/ε 0 is proposed [24], where ε 0 corresponds to the surface energy for standard chemical fragment. In turn, analogous relative parameters are proposed [25] for the volume characteristics (V-V 0 )/V 0 .…”

Section: The Proposal For the Estimation Of Nanostructures Reactivity Estimationmentioning

confidence: 99%

“…and then this expression after transformation stand in the eq. 3, than the equation 5 is receivedlg (W -W 0 ) = (τ/τ 0 ) n exp {[(ε 0 -ε)/ε 0 ]a + [(V 0 -V)/V 0 ]b}, (9) where values a and b -parameters, which correct the influence polar and steric (spaced) effects on reactivity in polymerization, the relation (ε 0 -ε)/ε 0 [24,25] correspondents to Taft constant σ (polarity constant), and the relation (V 0 -V)/V 0 -Taft constant E s (steric or spaced constant) [25]. The application of above notions for the Chemical Mesoscopics development is very perspective because stimulates the mathematic apparatus creation for the chemical processes flowing direction prediction.…”

Section: The Proposal For the Estimation Of Nanostructures Reactivity Estimationmentioning

confidence: 99%

Mini Review: Some Peculiarities of Chemical Mesoscopics and This Scientific Trend Development Perspective

Ivanovitch¹,

Vladimirovna²,

Valer’evitch³

2021

SJC

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In present mini review the definition of new scientific trend "chemical mesoscopics", which is based on the ideas of the mesoscopic physics (mesoscopics) and also more latest mesoscopic chemistry, is given. This new scientific trend includes quantum notions on mesoparticle reactivity in chemical reactions. In these cases the negative charges quants interactions (interference) are considered as well as the interactions of negative and positive charges (annihilation). The schemes of the chemical bonds formation at the reactions flowing into mesoscopic reactors are presented. The especial attention is devoted to the interactions of metal (Copper, Nickel) carbon mesoparticles with such oxidizers as Ammonium Polyphosphate and Aluminum Oxide. In these reactions it is observed the reduction of Phosphorus and Aluminum, the growth of mesocomposite metal atomic magnetic moment and the simultaneous increasing of spin quantity on the mesocomposite carbon shell. The introduction of "annihilation" notion explains the increasing of magnetic characteristics. The modification of polymeric materials (on example of epoxy resins) by metal carbon mesocomposites is considered. For the mesoparticle (nanostructures) reactivity estimation the proposals are done. These proposals are concluded in the using of Fractal Theory ideas (Kolmogorov -Avrami equations) together with energetic analogs of reactivity theory.

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Parameters of the Alfrey-Price and taft equations

Cited by 3 publications

References 6 publications

Microscopic morphology, rheological behavior, and mechanical properties of polymers: Recycled acrylonitrile‐butadiene‐styrene/polybutylene terephthalate blends

Microscopic morphology, rheological behavior, and mechanical properties of polymers: Recycled acrylonitrile‐butadiene‐styrene/polybutylene terephthalate blends

Opinion: Chemical--Mesoscopics..for the Mesoparticles Reactivity Explanation

Mini Review: Some Peculiarities of Chemical Mesoscopics and This Scientific Trend Development Perspective

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