Supermolecular organization and polymerization of compressed ethylene

Stoiljkovic, Dragoslav; Jovanović, Slobodan

doi:10.1002/actp.1988.010391202

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…It was shown that in spite of the very great differences in the polymerization conditions (tenfold increase of pressure, wide temperature range and different methods of initiation), equal macromolecular structure and properties of PE-LD are obtained if the entropy of the compressed ethylene is constant. [1][2][3][4][5][6] In previous papers 1,2,4 from authors laboratory, the effects of the ethylene entropy on the short (ethyl, butyl and amyl) and long branches, unsaturated bonds and density of PE-LD were expressed by mathematical equations derived by regression analysis of empricial data. A method was developed to predict the structure and properties of PE-LD that could be obtained over very wide range of polymerization conditions.…”

Section: !4mentioning

confidence: 99%

Dependence of the structural parameters and properties of low density polyethylene on the synthesis conditions

Stoiljkovic

Radicevic

Jankovic

1999

JSCS

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In a previous publicaitons from the authors.laboratotry a method was developed to predict the structure and properties of low density polyethylene (PE-LD) that could be obtained over a very wide range of polymerization conditions. The method was proved using experimental data from the literature. However, some shortcomings of the method were noticed. The aim of this work was to overcome the shortcomings and to enable the better manipulation of experimental data using a computer. A computer program has been developed to establish the mathematical relationships between ethylene entropy and the structural parameters and density of Pe-LD. All available experimental data (more than 300 experimental points) have elaborated and confirmed our mathematical models and our theoretical predictions.

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Section: !4mentioning

confidence: 99%

Dependence of the structural parameters and properties of low density polyethylene on the synthesis conditions

Stoiljkovic

Radicevic

Jankovic

1999

JSCS

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Importance of Boscovich's theory of natural philosophy for polymer science

Stoiljkovic¹

2007

Polimery

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It has been generally accepted that the macromolecular hypothesis was for the first time presented by H. Staudinger (1920). It is shown in this article, however, that Roger Boscovich, in his monumental work "Theory of natural philosophy", as early as in the 18th century, pointed out that the spiral atomic chains could be formed. He also pointed that the shape of the chain could be markedly changed due to slight changes of the distances among the atoms. The elastic properties of the chains have been stressed. The author of this article also presented some examples of the applications of Boscovich's theory for the interpretation of free-radical polymerization of compressed ethylene gas and liquid methyl methacrylate. The priority of Boscovich's macromolecular hypothesis is doubtless and his theory is still applicable in the current polymer science.

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Polymerization of organized monomers

Stoiljkovic

Pilić

Radičević

et al. 2004

Hem Ind

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The current explanations of olefin and vinyl monomer polymerization propose that monomer molecules are successively added one by one to the growing polymer chain. This may be true if the monomer molecules exist as individual species in a polymerizing system, e.g. in dilute solutions of monomer. There are cases, however, in which monomer molecules are organized: bulk liquid monomer, solid monomer, a monomer monolayer adsorbed on a support, etc. Various supra-molecular species and particles of monomer exist in such cases. In the 1960-ties, Semenov, Kargin and Kabanov proposed a theory of organized monomer polymerization. In the last 25 years, our research group has further developed and applied that theory to various polymerizing systems: the radical polymerization of compressed ethene gas, the radical polymerization of liquid methyl methacrylate, olefin polymerization by transition metals and by Al-based catalysts. An outline of the main achievements are presented in this article

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Supermolecular organization and polymerization of compressed ethylene

Cited by 6 publications

References 22 publications

Dependence of the structural parameters and properties of low density polyethylene on the synthesis conditions

Dependence of the structural parameters and properties of low density polyethylene on the synthesis conditions

Importance of Boscovich's theory of natural philosophy for polymer science

Polymerization of organized monomers

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