Thermisches Verhalten und Struktur von Copolymeren der Maleinsäure‐bzw. Fumarsäurehalbester

Rätzsch, M.; Steinert, Volker; Seiler, Steffen; Büttner, Birgit

doi:10.1002/actp.1984.010350507

Acta Polymerica

1984

DOI: 10.1002/actp.1984.010350507

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Thermisches Verhalten und Struktur von Copolymeren der Maleinsäure‐bzw. Fumarsäurehalbester

M. Rätzsch¹,

Volker Steinert²,

Steffen Seiler³

et al.

Abstract: Herrn Prdfessor Dr. Dr. h. c. Hermann Hare zum 75. Geburtstag gewidrriet Das thermische Verhalten von Maleinsaurehalbester-Copolymeren, die durch Veresterung van MaleinsaureanhydridCopolymeren hergestellt wurden, und der Copolymere der Malein-sowie Fumarsaurehalbester wird untersucht. Daraus werden Ruckschlusse auf die Struktur der Copolymere gezogen. Die Schwierigkeiten bei der experimentellen Durchfuhrung der Cyclisierungsreaktion in Losung, die zur Umsetzung in der Festphase gefuhrt haben, werden beschriebe… Show more

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Cited by 6 publications

References 9 publications

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Copolymerization of monomethyl maleate and ‐fumarate with styrene

1985

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The copolymerization of monomethyl maleate (MMM) or monomethyl fumarate (MMF) with styrene is investigated. The dependence of the copolymerization rates on the composition of the monomer mixture and the monomer reactivity ratios r are determined. An identical structure of the MMM and MMF polymer radicals was found, that is the k,,-values of both copolymerization systems are equal (monomer 1 = styrene; monomer 2 = MMM or MMF).From this knowledge the difference of the copolymerization rates between MMM and MMF can be attributed to the k,,-values.

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Copolymerization of monomethyl maleate and ‐fumarate with styrene

1985

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Structural analysis of alkene/maleic anhydride copolymers

Rätzsch¹,

Zschoche

Steinert

et al. 1986

Makromol. Chem.

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Structural investigations on maleic anhydride (MAn) copolymers with ethene, propene and styrene, their products of hydrolysis, and their methyl half-esters by means of I3C NMR spectroscopy are presented. The spectra of 2,3-diethylsuccinic acid and its anhydrides in the erythro-and threo-configuration and of butylsuccinic acid and its anhydride were obtained and compared with the spectra of the copolymers. In each case the results show the formation of both threo(trans)-and erythro(c~)-structures. At a polymerization temperature of 60 "C the proportions were 88% threo to 12% erythro for ethene/MAn copolymers and 80% threo to 20% erythro for propene/MAn copolymers, a ratio which was confirmed also by the hydrolyzed forms. Copolymerization at 150°C leads, in the case of propene/MAn, to 67% threo and 33% erythro. The production of ethene/MA copolymer via the copolymerization of ethene and fumaric acid half-ester and its saponification to ethene/fumaric acid leads to a ratio of 38% threo to 62% erythro. These results are in accordance with the thermal stabilities of the configurations. In the case of styrene/MAn copolymer it is not possible to obtain a unique interpretation of the configurations from the spectra. For the conversion of propene/MAn and styrene/MAn copolymers by means of methanol to half-esters it can be derived from the I3C NMR spectra how many of the half-ester moieties are obtained in the neighbourhood of the methyl and phenyl groups, respectively, of the olefin. a) Revised manuscript of August 16, 1985.

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Struktur und Reaktivität von alternierenden Maleinsäure‐Anhydrid‐Copolymeren

Rätzsch¹,

Steinert²

1987

Zeitschrift fuer Chemie

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Alternating copolymers that contain maleic anhydride (MAn) as a component occur in two different stereochemical configurations which are differentiated by their reactivity. Model compounds, 2, 3‐dialkylsuccinic acids and their anhydrides, were investigated and it was demonstrated that there is a distinct difference between threo and erythro configurations in their chemical and physical behaviour. Both configurations also occur in the alternating copolymers. The relative reactivity of the anhydride group compared to other carbon acid derivates and the mechanism of reaction to catalized and uncatalized nucleophiles are discussed. The reaction results of model compounds and of alternating MAn‐copolymers to aromatic and aliphatic amins are presented. The cyclization reaction to corresponding imides is described, and their dependence from the amine basicity and from steric effects of amine and its copolymers, produced without and with catalyzer, is outlined.

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Thermisches Verhalten und Struktur von Copolymeren der Maleinsäure‐bzw. Fumarsäurehalbester

Cited by 6 publications

References 9 publications

Copolymerization of monomethyl maleate and ‐fumarate with styrene

Copolymerization of monomethyl maleate and ‐fumarate with styrene

Structural analysis of alkene/maleic anhydride copolymers

Struktur und Reaktivität von alternierenden Maleinsäure‐Anhydrid‐Copolymeren

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