Cyclodimer aus Bisphenol‐A‐diglycidylether und N,N′‐disubstituiertem 4,4′‐Diaminodiphenylmethan. Unvernetzte Epoxid‐Amin‐Additionspolymere, 20.

Hörhold, Hans‐Heinrich; Grützner, Rolf-Egbert

doi:10.1002/actp.1987.010380410

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…It was first reported that bisphenol A based epoxies exhibited no tendency to cyclize when cured by amines 1. Cyclics were found only under special conditions at high dilution, not in bulk reactions 2…”

Section: Introductionmentioning

confidence: 99%

Assessment of cyclization and network defects in glycidylamine‐based epoxy networks by selective degradation

Stütz¹,

Tesch²

2003

J of Applied Polymer Sci

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A special model system based on trimethylene glycol di(p-aminobenzoate) and its glycidyl derivative was evaluated to study the extent of cyclization in glycidylamine epoxies. The cured resins were degraded by alkaline hydrolysis, which left the cycles unaffected. The cycle concentration obtained by high-performance liquid chromatography was 15%. The oligomer distribution of the degradation products strongly indicated that up to 40% of the epoxy groups were lost to side reactions, and this resulted in a large number of structural defects in the network.

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Section: Introductionmentioning

confidence: 99%

Assessment of cyclization and network defects in glycidylamine‐based epoxy networks by selective degradation

Stütz¹,

Tesch²

2003

J of Applied Polymer Sci

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“…The isolation of epoxide–amine cyclomers has been described some years ago. These cyclomers were obtained by the reaction in high dilution and subsequent purification with column chromatography 19. Because of the large numbers of heteroatoms in the β‐(hydroxypropyl) amino structure and ether linkages, epoxide–amine addition polymers as well as pure oligoether diamines form complexes with metal ions20 similar to cyclic cryptants.…”

Section: Introductionmentioning

confidence: 99%

Metal‐template synthesis of cyclic epoxide–amine oligomers: Uncrosslinked epoxide–amine addition polymers, 47

Klee¹,

Hägele²,

Przybylski³

2003

J. Polym. Sci. A Polym. Chem.

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The addition reaction of 2,2-bis-[4-(2,3-epoxypropoxy)-phenyl]-propane (DGEBA) and preformed complexes of metal ions and disecondary diamines led to a large quantity of cyclic epoxide-amine oligomers. As shown by gel permeation chromatographic analysis, cycles of n ϭ 1, 2, and 3 were formed. Functional epoxide end groups of the prepared oligomers were completely missing in the IR and 1 H NMR and 13 C NMR spectra. In the fast atom bombardment and matrix-assisted laser desorption/ ionization mass spectra, the molecular ions of the n ϭ 1, 2, 3 cycles of DGEBA and N,NЈ-dibenzyl-5-oxanonanediamine-1,9 were detected at m/z ϭ 680, 1361, and 2042.

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“…[7] Cyclic oligomers of 2,2-bis[4-(2,3-epoxypropoxy)phenyl]propane (DGEBA) and disecondary aromatic diamines have been synthesized in highly diluted solutions. [8] Small amounts of series of cyclic oligomers were also found in linear epoxide-amine addition polymers of DGEBA and primary monoamines, [9,10] which were separated by precipitation of addition polymers in acetone. [6,7] Some years ago the formation of cyclic oligomers of DGEBA and primary monoamines seemed to be impossible because of the assumed high ring tension.…”

Section: Introductionmentioning

confidence: 99%

Linear Addition Polymers and Cyclic Oligomers ofN,N-Diglycidyl Aniline and Amines. Uncrosslinked Epoxide-Amine Addition Polymers, 46

Klee

Flammersheim

2002

Macromol. Chem. Phys.

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Cyclodimer aus Bisphenol‐A‐diglycidylether und N,N′‐disubstituiertem 4,4′‐Diaminodiphenylmethan. Unvernetzte Epoxid‐Amin‐Additionspolymere, 20.

Cited by 7 publications

References 3 publications

Assessment of cyclization and network defects in glycidylamine‐based epoxy networks by selective degradation

Assessment of cyclization and network defects in glycidylamine‐based epoxy networks by selective degradation

Metal‐template synthesis of cyclic epoxide–amine oligomers: Uncrosslinked epoxide–amine addition polymers, 47

Linear Addition Polymers and Cyclic Oligomers ofN,N-Diglycidyl Aniline and Amines. Uncrosslinked Epoxide-Amine Addition Polymers, 46

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