Über Isopren und Kautschuk. 26. Mitteilung. Über hemikolloide Hydrokatschuke

Staudinger, H.; Geiger, Ernst; Huber, E.M.; Schaal, W.; Schwalbach, A.

doi:10.1002/hlca.19300130616

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…It agrees closely with the value obtained by a summation of the atomic refractivities of the atoms in the unit of the polymer. Such observations have been reported for polymethyl acrylate (ft), polystyrene (19), rubber (20), hydrorubber (20), polyethylene glycols (7), and polybutadiene (o).…”

supporting

confidence: 68%

Relation between Specific Refractivity of Polymers and Atomic Structure of Polymer Unit.

Wiley¹

1946

Ind. Eng. Chem.

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I he refractive index and density data for twenty-six polymers have been used to determine unit refractivities, defined as the specific refractivity multiplied by the summation of the atomic weights of the atoms in the polymer unit.These unit refractivities agree with values calculated as a summation of the atomic refractivities of the atoms in the units of the polymer chain. New data are reported for poly vinyl chloroacetate and for the copolymer of styrene and maleic anhydride. THE literature contains several isolated reports that the specific refractivity of a polymer is related to the atomic structure of the unit of the polymer chain. The specific refract ivity is obtained from the density and refractive index data, using «the Lorentz-Lorenz equation, and is multiplied by the molecular weight of the polymer unit to give a refractivity ' value. This value, called "unit refractivity" in this discussion, is a characteristic of the polymer. It agrees closely with the value obtained by a summation of the atomic refractivities of the atoms in the unit of the polymer. Such observations have been reported for polymethyl acrylate (ft), polystyrene (19), rubber (20), hydrorubber (20), polyethylene glycols (7), and polybutadiene (o).

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supporting

confidence: 68%

Relation between Specific Refractivity of Polymers and Atomic Structure of Polymer Unit.

Wiley¹

1946

Ind. Eng. Chem.

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“…Staudinger, however, antedates Schmidt in pointing out the weakness of 0-bonds in general, e.g., alkyl compounds and grouping were extensively considered (146,147,149,150).…”

Section: Chs Chmentioning

confidence: 99%

Conversion of Hydrocarbons into Butadiene.

Egloff¹,

Hulla²

1944

Chem. Rev.

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Über hochpolymere Verbindungen, 126. Mitteil.: Vergleich der osmotischen und viscosimetrischen Molekulargewichts‐Bestimmungen an polymerhomologen Reihen

Staudinger

Schulz

1935

Ber. dtsch. Chem. Ges. A/B

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Uber hochpolymere Verbindunqen ( C X X VI. ). 2321mungen von Poly-styrolen, die von R. Signer4) nach der Svedbergschen Methode mittels der Ultra-zentrifuge ausgefiihrt waren, zu dem Ergebnis fiihrten, daL3 hier zwar das Viscositats-Gesetz giiltig ist, da13 also die Viscositat proportional mit dem Molekulargewicht ansteigt, jedoch die absoluten Werte fur das Molekulargewicht nach der S v e d b e r gschen Methode ungefahr doppelt so hoch als die nach der Viscositats-Methode sind, eine Unstimmigkeit, die bisher nicht aufgeklart werden konnte5).11. E i n e neue Auswertungs-Methode f u r osmotische Molekulargewichts-Bestimmungen.Eine Schwierigkeit bei der Auswertung der osmotischen Drucke von hochmolekularen Korpern besteht darin, daG diese zum Unterschied von niedermolekularen nicht dem Gesetz von van' t H o f f gehorchen :(pc ist der osmotische Druck, c ist die Konzentration in g/l).

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Über Isopren und Kautschuk. 26. Mitteilung. Über hemikolloide Hydrokatschuke

Cited by 9 publications

References 5 publications

Relation between Specific Refractivity of Polymers and Atomic Structure of Polymer Unit.

Relation between Specific Refractivity of Polymers and Atomic Structure of Polymer Unit.

Conversion of Hydrocarbons into Butadiene.

Über hochpolymere Verbindungen, 126. Mitteil.: Vergleich der osmotischen und viscosimetrischen Molekulargewichts‐Bestimmungen an polymerhomologen Reihen

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