Modelle und modellreaktionen für die halogenierung von <i>cis</i>‐ und <i>trans</i>‐1.4‐polybutadien. Ein beitrag zur stereochemie der „kopf‐kopf‐polyvinylhalogenide”︁

Hörhold, Von Hans-Heinrich; Kühmstedt, R.; Hindersin, Peter; Dawczynski, Hans; Drefahl, Günther

doi:10.1002/macp.1969.021220112

Cited by 21 publications

(1 citation statement)

References 24 publications

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“…13) in the case of the chlorination of 1.4-polybutadienes and will be faced by us in a successive paperls). The latter problem has already been discussed b y HORHOLD et ~1.…”

Section: Properties Of Poly(l2-dihaloalkamer)~mentioning

confidence: 99%

The addition halogenation of polyalkenamers. I. Synthesis and properties of the homologous series of poly(1.2‐dihaloalkamer)s

1972

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The addition chlorination and bromination of a series of polyalkenamesr where n varies from 2 to 10, yield a homologous series of poly(1.2‐dihaloalkamer)s Substitution halogenation is completely avoided by operating in methylene chloride solution. Experimental features of the halogenations are examined. No appreciable degradation of the polymers accompanies the halogenation reaction. Some physical properties of poly‐(1.2‐dihaloalkamer)s are reported and compared with those of chlorinated polyethylenes. Many of the polymers exhibit X‐ray crystallinity by well oriented fibre spectra and first order transition at DTA analysis.

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“…13) in the case of the chlorination of 1.4-polybutadienes and will be faced by us in a successive paperls). The latter problem has already been discussed b y HORHOLD et ~1.…”

Section: Properties Of Poly(l2-dihaloalkamer)~mentioning

confidence: 99%

The addition halogenation of polyalkenamers. I. Synthesis and properties of the homologous series of poly(1.2‐dihaloalkamer)s

1972

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Pyrolysis‐gas chromatographic investigation on structure of chlorinated 1.4‐polybutadienes

et al. 1970

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Thermal degradation of chlorinated cis-and trans-polybutadienes was studied by means of pyrolysis-gas chromatography. The mechanism of chlorination reaction and thermal degradation of the polymers was examined over a wide range of degree of .chlorination. The steric structure of so-called head-to-head polyvinyl chloride was elucidated by analysis of such characteristic degradation products as 0-, m-, and p-dichlorobenzenes and vinylidenechloride. ZUSAMMENFASSUNG:Die thermische Degradation der Chlorierungsprodukte von cis-und trans-1.4-Polybutadien wurde mit Hilfe der Pyrolyse-Gaschromatographie untersucht. Der Mechanismus der Chlorierung und der thermischen Degradation wurde iiber einen weiten Chlorierungsgrad gepriift. Aul3erdem wnrde durch Analyse von charakteristischen Degradationsprodukten wie 0-, m-und p-Dichlorbenzol und Vinylidenchlorid die sterische Struktur der sogenannten Kopf-Kopf-Polyvinylchloride geklart.

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The addition halogenation of polyalkenamers. II. Studies concerning chain mechanism of chlorine addition to polyalkenamer double bonds

1972

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S U M M A R Y :The presence of a certain degree of crystallinity in poly(l.2-dichloroalkamer)s, obtained by addition chlorination of a homologous series of stereoregular polyalkenamers, ranging from polybutenamer t o polydodecenamer, may suggest a chain mechanism for chlorine addition. Three different approaches have been used in order to support such a mechanisnl by experimental evidences :Determination of the relative velocities of chlorine addition to the two double bonds of different dienes, used as model compounds of polyalkenamers.Investigation of the demolition products of partially chlorinated polyalkenamers.Examination of the DTA thermograms of partially chlorinated polyalkenamers. Z U S A M M E N F A S S U N G :Ein gewisser Grad von Kristallinitat in Poly-l.2-dichlor-alkameren, welche durch additive Chlorierung einer homologen Rcihc von Polyalkenameren, die das Polybutenamere bis zum Polydodecenameren umfaot, hergcstellt wurden, IiiRt einen Kettenmechanismus der Chloraddition moglich erscheinen. Um einen solchen Kettenmechanismus experimentell zu stutzen, wurden drci verschiedene Wege beschritten ; 1. Restimmung der relativen Geschwindigkeit der Chloraddition an die beiden Doppelbindungen verschiedener Diene als Modelle von Polyalkenameren.2. Untersuchung der Abhauprodukte partiell chlorierter Polyalkenamerer.3. Priifung der Differentialthermogramme von partiell chloriertem Polypentenamerem.

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Modelle und modellreaktionen für die halogenierung von cis‐ und trans‐1.4‐polybutadien. Ein beitrag zur stereochemie der „kopf‐kopf‐polyvinylhalogenide”︁

Cited by 21 publications

References 24 publications

The addition halogenation of polyalkenamers. I. Synthesis and properties of the homologous series of poly(1.2‐dihaloalkamer)s

The addition halogenation of polyalkenamers. I. Synthesis and properties of the homologous series of poly(1.2‐dihaloalkamer)s

Pyrolysis‐gas chromatographic investigation on structure of chlorinated 1.4‐polybutadienes

The addition halogenation of polyalkenamers. II. Studies concerning chain mechanism of chlorine addition to polyalkenamer double bonds

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