Theory of polydispersity correction procedures for the determination of molecular weight dependences

Raczek, J.

doi:10.1016/0014-3057(82)90168-9

Cited by 10 publications

(1 citation statement)

References 17 publications

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“…In this case the weight-average molecular weights of the light scattering measurements must be transferred to viscosity-average values, a procedure which is easily performed when the molecular weight distribution and the value are known. 26 From the GPC experiments (cf.…”

Section: Spontaneous Polymerization Of Ema Cema and Mcamentioning

confidence: 99%

Spontaneous polymerization of methyl methacrylate. 8. Polymerization kinetics of acrylates containing chlorine atoms

Lingnau¹,

Meyerhoff²

1984

Macromolecules

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Section: Spontaneous Polymerization Of Ema Cema and Mcamentioning

confidence: 99%

Spontaneous polymerization of methyl methacrylate. 8. Polymerization kinetics of acrylates containing chlorine atoms

Lingnau¹,

Meyerhoff²

1984

Macromolecules

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A general method for the determination of “monomolecular property versus molar mass relationships” from measurements on polymolecular polymers

Bareiss¹

1983

Makromol. Chem.

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Monomolecular property ( p ) versus molar mass ( M ) relationships" of the type p = K p . Map as would result from an experimental determination of p and M of a polymer-homologous series of strictly monomolecular polymers can also be obtained from a polymer-homologous series of polymolecular polymer samples or fractions, provided their correct corresponding averages 3 and Mare determined (Principle of Corresponding Averages). In order to obtain the monomolecular intrinsic viscosity [a] vs. M relationship (Mark-Houwink relationship), the corresponding averages weight-average intrinsic viscosity ( [ q ] , = [ q ] ) and viscosity-average molar mass (Mr,) of a series of polymer-homologous, polymolecular polymer samples or fractions have to be determined experimentally. Accordingly, the corresponding monomolecular relationships sedimentation coefficient s vs. M , diffusion coefficient D vs. M , and mean-square radius of gyration ( r 2 > vs. M a y obtained by the determination of a series of couples of the corresponding averages Svs. M, D vs. M, and (?) vs. M , respectively. The experimental determination of the corresponding averages presented is possible by different methods, including the determination of the molar mass distribution.

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Efficiency of polymer fractionation—A review

Mencer

1988

Polymer Engineering & Sci

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With respect to molecular masses, polymers are polydispersive. Since many of their properties depend on the distribution of molecular masses, to study this correlation it is necessary to have samples of narrow molecular mass distribution or samples with accurately defined distribution. In spite of the developmental progress of fast instrumental methods (analytical and preparative gel chromatography) used to determine the molecular mass distribution curve and to obtain higher amounts of fractions of narrow molecular mass distributions, there still exists an interest in classical methods of fractionation. On the basis of a survey of monographs on polymer fractionation, numerous publications and personal experience, this review describes primarily what is an efficient fractionation. Afterwards, factors that affect fractionation efficiency according to the type of effects arc given and causes of their action are described. Conditions under which efficient fractional precipitation and fractional solution methods are applied are considered separately. At the end of the review, criteria on the basis of which fractionation efficiency is evaluated are considered in detail.

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Theory of polydispersity correction procedures for the determination of molecular weight dependences

Cited by 10 publications

References 17 publications

Spontaneous polymerization of methyl methacrylate. 8. Polymerization kinetics of acrylates containing chlorine atoms

Spontaneous polymerization of methyl methacrylate. 8. Polymerization kinetics of acrylates containing chlorine atoms

A general method for the determination of “monomolecular property versus molar mass relationships” from measurements on polymolecular polymers

Efficiency of polymer fractionation—A review

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