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Bestimmung der zur Kristallisation notwendigen minimalen Sequenzlänge an Polyvinylchlorid

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Zusammenfassung

Taktisches Polyvinylchlorid wird als Copolymer aus kristallisierfähigen syndiotaktischen und nichtkristallisierfähigen isotaktischen Sequenzen aufgefaßt. In Anlehnung an dieFlorysche Theorie der Kristallisation von Copolymeren wird aus der Syndiotaxie und dem Kristallinitätsgrad eine untere Grenzlänge der kristallisierten Sequenzen bestimmt. Die Syndiotaxie der Proben war aus Kernresonanz- und UR-Messungen bekannt, der Kristallinitätsgrad wurde röntgenographisch gemessen.

Die minimale Sequenzlänge beträgt etwa 12 Monomereinheiten.

Summary

In this paper stereoregular polyvinylchloride is considered as a copolymer of syndiotactic parts being and isotactic parts not being able to crystallize. Following the conception ofFlory's theory of copolymer crystallization a lower limit of the length of crystallized sequences is determined by using syndiotacticity and degree of crystallinity. The syndiotacticity of the samples was known from NMR- and IR-experiments. The degree of crystallinity was measured by x-ray-diffraction.

The minimum sequence length is nearly 12 monomer units.

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Schrifttum

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Author notes

  1. K. -H. Hellwege

    Present address: Deutschen Kunststoff-Institut Darmstadt, Deutschland

Authors and Affiliations

  1. Deutschen Kunststoff-Institut Darmstadt, Deutschland

    U. Johnsen & D. Kochott

Authors
  1. K. -H. Hellwege
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  2. U. Johnsen
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  3. D. Kochott
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Additional information

Vorgetragen am 12. September 1963 auf der Physikertagung 1963 in Hamburg.

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Hellwege, K.H., Johnsen, U. & Kochott, D. Bestimmung der zur Kristallisation notwendigen minimalen Sequenzlänge an Polyvinylchlorid. Kolloid-Z.u.Z.Polymere 194, 5–7 (1964). https://doi.org/10.1007/BF01499970

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  • DOI: https://doi.org/10.1007/BF01499970

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