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Digitale Medien

Polymer encapsulated packing material for reversed phase liquid chromatography (1994)

Zuo, Y. M. ; Zhu, B. R. ; Liao, Y. ; [weitere]

Springer

Chromatographia 38 (1994), S. 756-760

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ISSN: 1612-1112

Schlagwort(e): Column liquid chromatography ; Polymer encapsulated packings ; Poly(ethylstyrene-divinylbenzene) ; Preparation and evaluation

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A series of polymer-encapsulated packing materials for reversed phase high-performance liquid chromatography was prepared by radical polymerization of ethylstyrene and divinylbenzene with vinyl-modified silica in solution. Some characteristics such as polymer structure, swelling propensity, residual silanols, column efficiency and retention properties were evaluated. Such material is easy to pack and yields high column efficiencies. Its superior performance for the separation of mixtures of aromatic hydrocarbons, amino- and hydroxyl group containing compounds are demonstrated by several examples.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02269632

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Digitale Medien

A study of glass fiber-epoxy composite interfaces (1989)

Liao, Y.-T.

Brookfield, Conn. : Wiley-Blackwell

Polymer Composites 10 (1989), S. 424-428

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ISSN: 0272-8397

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Maschinenbau

Notizen: Fourier transform infrared spectroscopy was utilized to characterize the interfacial bonding in glass-fiber-reinforced composites. The pH of the treating solution significantly affects the interfacial chemical bonding. The natural pH of the solution gives the maximum interfacial bonding. The decrease of the interfacial bonding is due to the side reactions that occur when NaOH or HCl is added to the solution. The temperature of the curing process has little effect on the amount of the interfacial chemical bonding. We attribute this to the reaction rate constant of the interfacial reaction being much larger than that of the epoxy polymerization. From the hygrothermal behavior, we have found the amount of silane needed for hygrothermal condition is different from that for dry condition.

Zusätzliches Material: 8 Ill.