Über einige wasserfreie Acetate und Hydroacetate aus der Reihe der seltenen Erden

Kotowski, Alfons; Lehl, Herbert

doi:10.1002/zaac.19311990120

Cited by 13 publications

(2 citation statements)

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“…The rare earth organoacid compounds were prepared by modified literature procedures 15–22. Ten grams of lanthanum oxide was mixed with 11.1 g of glacial acetic acid in 100 mL of water.…”

Section: Methodsmentioning

confidence: 99%

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

Deng

Yuan

Xiong

et al. 1999

J. Appl. Polym. Sci.

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Ring-opening polymerization of lactone and lactide have been initiated with rare earth organoacid compounds, such as lanthanum acetate in bulk. The polymerization mechanism is in agreement with the "nonionic-coordination-insertion" mechanism, which involves the selective cleavage of the acyl-oxygen bond of the monomer. These organoacid rare earth initiators can give high yield of medium to high molecular weight products. An interesting aspect of this investigation is the good agreement between the performance of the initiator and the solubility of the initiator in the monomer. However, the relatively slow initiation step makes it difficult to control the molecular weight and results in a broad molecular weight distributions.

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“…The rare earth organoacid compounds were prepared by modified literature procedures 15–22. Ten grams of lanthanum oxide was mixed with 11.1 g of glacial acetic acid in 100 mL of water.…”

Section: Methodsmentioning

confidence: 99%

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

Deng

Yuan

Xiong

et al. 1999

J. Appl. Polym. Sci.

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“…Since this decreased the amount of B available for reaction to MgB 2 , excess Mg was oxidized. The literature [18] has revealed that Y(C 2 H 3 O 2 ) 3 decomposes to free C, Y 2 O 3 , etc. The free C is substituting boron, and Y 2 O 3 are usually increasing the MgO and YB 4 content.…”

Section: Experiments Detailsmentioning

confidence: 99%

EnhancedJ_c–Bproperties of MgB₂tapes by yttrium acetate doping

Wang¹,

Gao²,

Zhang³

et al. 2011

Supercond. Sci. Technol.

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We report the effect of yttrium acetate addition on in situ powder-in-tube processed MgB 2 /Fe tapes. The amount of yttrium acetate was varied from 0 to 20 wt% and sintering was performed at 700-850 • C for 1 h in a flowing Ar atmosphere. We found that a significant J c -B enhancement was easily achieved in high field by yttrium acetate doping. At 4.2 K, the transport J c for the best yttrium-acetate-added tapes (10 wt%) reached almost 10 4 A cm −2 at 12 T. The improvement of J c performance in the yttrium-acetate-doped samples can be attributed to the combination of the carbon substitution for B and stronger flux pinning.

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Die Grundlagen der Chemie in wasserfreier Essigsäure

Maaß¹,

Jander²

1953

Fortschritte Der Chemischen Forschung

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Über einige wasserfreie Acetate und Hydroacetate aus der Reihe der seltenen Erden

Cited by 13 publications

References 1 publication

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

EnhancedJ_c–Bproperties of MgB₂tapes by yttrium acetate doping

Die Grundlagen der Chemie in wasserfreier Essigsäure

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Über einige wasserfreie Acetate und Hydroacetate aus der Reihe der seltenen Erden

Cited by 13 publications

References 1 publication

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

Polymerization of lactides and lactones. II. Ring-opening polymerization of ?-caprolactone andDL-lactide by organoacid rare earth compounds

EnhancedJc–Bproperties of MgB2tapes by yttrium acetate doping

Die Grundlagen der Chemie in wasserfreier Essigsäure

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EnhancedJ_c–Bproperties of MgB₂tapes by yttrium acetate doping