Development of a quantitative theory of polycondensation

Кучанов, С.И.

doi:10.1016/s0079-6700(04)00025-5

Cited by 35 publications

(58 citation statements)

References 252 publications

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“…an existing bond with an atom will clearly prevent bonding of another atom at that coordination site). Subsequent work has confirmed that the Flory principle holds for all but a few ''non-ideal'' polymers, namely those in which occupation of one coordination site affects the coordinative properties of other sites on an atom or molecule (short-range effects), or those in which the interaction of the polymer with the solvent inhibits accessibility of the coordination sites (long-range effects) (Kuchanov et al, 2004). The Flory principle also neglects intramolecular reactions (Flory, 1946;Kuchanov et al, 2004).…”

Section: Polymerisation and Precipitationmentioning

confidence: 96%

Reconciling kinetic and equilibrium observations of iron(III) solubility in aqueous solutions with a polymer-based model

Rose

Waite

2007

Geochimica et Cosmochimica Acta

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Section: Polymerisation and Precipitationmentioning

confidence: 96%

Reconciling kinetic and equilibrium observations of iron(III) solubility in aqueous solutions with a polymer-based model

Rose

Waite

2007

Geochimica et Cosmochimica Acta

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“…The mathematical modeling of step‐growth polymerizations has been an active field of research along many decades . The developed models may be classified as stochastic or deterministic . Stochastic models are typically represented by algebraic equations and predict the evolution of the MMD along the extent of reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Deterministic models require to input reaction rate, are typically represented by sets of differential equations, and the independent variable is time. Due to lack of computational facilities, the first models have been all stochastic, and adopted the following “classical” (equal reactivity) assumptions: (1) intramolecular or secondary reactions are negligible, (2) the reaction rate is independent of chain length, and (3) the polymerization is homogeneous. When applying such assumptions onto standard AA + BB polymerizations carried out to high conversion, the following is observed: (1) under stoichiometric conditions, the MMD tends to a “most probable” (or Schulz–Flory) distribution of molar mass dispersity

{\overset{false¯}{M}}_{w} / {\overset{false¯}{M}}_{n} \to 2

, and (2) under nonstoichiometric conditions, lower average molar masses and dispersities are obtained.…”

Section: Introductionmentioning

confidence: 99%

Linear segmented polyurethanes. II. A mathematical model for the prepolymerization stage

Polo

Pesoa

Nicolau

et al. 2018

J of Applied Polymer Sci

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In the first part of this sequel, an experimental investigation on the synthesis of linear segmented polyurethanes was presented, that included estimation of the kinetic constants at 60 C for the prepolymerization and finishing stages. This work presents two comprehensive mathematical models that simulate the mentioned prepolymerizations, in reactions between two poly(tetramethylene oxide) PTMO macrodiols and an excess of methylene diphenyl diisocyanate. The models require to input the molar mass distribution (MMD) of the initial macrodiol. The single-phase (or homogeneous) model calculates a final MMD of approximately 40,000 different molecular species, and somewhat underestimates the observed molar mass dispersities. The double-phases (or heterogeneous) model produces a better fit of the observed MMDs by simulating two independent polymerizations carried out in parallel. The double-phases model contains three adjustable parameters: the reaction imbalances into both phases, and an "effective" rate constant. In part III of this sequel, the presented models will be extended to simulate the finishing stages.

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“…While these behaviors are relatively well documented in the case of polysoaps and macrosurfactants [12], more complex architectures have received less attention. Nevertheless, branched polymers have also attracted considerable attention in recent years in the field of macromolecules [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Acyl Poly(Glycerol‐Succinic Acid) Oligoesters: Synthesis, Physicochemical and Functional Properties, and Biodegradability

Agach

Marinković²,

Estrine³

et al. 2016

J Surfact & Detergents

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Biobased surfactants were synthesized using poly(glycerol‐succinate) as the polar head group and variable acyl groups as hydrophobic tails. Acyl chain lengths ranged from 8 to 14 carbon atoms. The resulting oligomeric surfactants were characterized by quantitative 13C nuclear magnetic resonance (NMR), acid values and size exclusion chromatography. Investigation of the physicochemical properties of the acyl poly(glycerol‐succinate) surfactants revealed their potential for use in a wide array of applications. The acyl poly(glycerol‐succinate) functional properties appeared to be particularly concentration‐dependent. This study highlights the relative impact of acyl chain length on the polymeric structure, physicochemical and functional behaviors, and biodegradability of the acyl poly(glycerol‐succinate) surfactants.

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Development of a quantitative theory of polycondensation

Cited by 35 publications

References 252 publications

Reconciling kinetic and equilibrium observations of iron(III) solubility in aqueous solutions with a polymer-based model

Reconciling kinetic and equilibrium observations of iron(III) solubility in aqueous solutions with a polymer-based model

Linear segmented polyurethanes. II. A mathematical model for the prepolymerization stage

Acyl Poly(Glycerol‐Succinic Acid) Oligoesters: Synthesis, Physicochemical and Functional Properties, and Biodegradability

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