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Structure and properties of styrene-divinylbenzene copolymers
Polymer Bulletin, 1994The influence of binary mixtures of alcohols with different diluents on the porous structure of styrene-divinylbenzene (Sty-DVB) copolymers was investigated. Two series of binary mixtures were tested: one with isoamyl alcohol (1-AmA) and another with benzyl alcohol (BA). For systems containing 1-AmA, the hydrogen bonds between alcohol and polar solvent
D. Rabelo, F. M. B. Coutinho
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Heterogeneities of styrene-divinylbenzene-copolymers
Polymer Bulletin, 1989The heterogeneity of copolymers of styrene and divinylbenzene was investigated. The distribution of divinylbenzene units within the crosslinked copolymer yields information about the inhomogeneity of the network formed. Proceeding from the monomer reactivity ratios, the monomer compositions and from the conversion we set up histogramms of the ...
Gerhard Schwachula, Georgi Popov
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Kinetics of devitrification of styrene‐divinylbenzene copolymers
Die Angewandte Makromolekulare Chemie, 1984AbstractThe dependence of glass temperature on the heating rate for styrene‐divinylbenzene solvent modified network copolymers has been investigated by differential scanning calorimetry. The McMillan equation has been utilized to determine apparent activation energies of vitrification.
Marek Eder +2 more
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The swelling of filled styrene-divinylbenzene copolymers
Polymer Science U.S.S.R., 1966IT IS now known that the addition of fillers to polymers, especially rubbers, results in additional network formation. In our earlier studies [1-3] we examined the effect of a filler on structure formation in thermoplastic polymers. Study of the special features of structure formation in the case where formation of the polymer takes place ...
Yu.S. Lipatov, L.M. Sergeyeva
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Structure of some styrene–divinylbenzene copolymers
Journal of Applied Polymer Science, 1995AbstractStructures of copolymers of styrene and divinylbenzene (50% crosslinking degree) prepared in suspension polymerization in the presence of mixtures of nonsol (heptane or decane) and sol (toluene or tetralin) diluents were investigated. The studies showed that the diluents enriched with nonsol solvents resulted in an increase of pore volumes and ...
M. Wojaczyñska, B. N. Kolarz
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On the structure of macroreticular styrene‐divinylbenzene copolymers
Die Angewandte Makromolekulare Chemie, 1988AbstractThe influence of the removal of various diluents, pore forming agents from the porous styrene‐ethylstyrene‐acrylonitrile‐divinylbenzene copolymers on the structure of the matrix was investigated by several methods. The most advantageous pathway to preserve the initial structural edifice of the porous networks performed in the presence of ...
Ignat Poinescu +3 more
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Synthesis of porous styrene divinylbenzene copolymers
Die Angewandte Makromolekulare Chemie, 1985AbstractThe copolymerization of styrene with divinylbenzene in the presence of tri‐n‐butylphosphate or a mixture of di‐2‐ethylhexylphosphoric acid and chlorobenzene was studied in order to perform porous networks, solvent impregnated copolymers, etc. The diluents behave as strong precipitants allowing to prepare permanent porous copolymers having low ...
Ignat Poinescu +2 more
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Scanning electron microscopy of styrene-divinylbenzene copolymers
Polymer Bulletin, 1995Styrene-divinylbenzene copolymers were synthesized by suspension polymerization in presence of di(2-ethylhexyl) phosphoric acid and methyl ketone as diluents. The surface and bulk morphology of the beads were investigated through scanning electron microscopy. The influence of diluent-copolymer interaction, dilution degree and interfacial tension on the
D. Rabelo +3 more
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Fluorinated styrene divinylbenzene copolymer as catalyst support
Applied Catalysis, 1991Abstract Styrene divinylbenzene copolymer (SDB) is an inert high surface area material suitable for supporting noble metal catalysts. Because SDB is hydrophobic, the resulting catalysts are free from capillary condensation and remain active in the presence of water. Although SDB supported catalysts are stable at moderate temperatures, it is desirable
J.J. Wu, L. Fu, K.T. Chuang
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Mechanism of hypercrosslinking of chloromethylated styrene–divinylbenzene copolymers
Reactive and Functional Polymers, 1999Abstract Hypercrosslinked polymers are remarkable materials exhibiting extremely high apparent surface area and exceptional sorption properties. Their special morphology is a result of the fixation of expanded position of polymer chains in a good (swelling) solvent by methylene crosslinking bridges created by the Friedel–Crafts reaction of ...
Pavel Veverka, Karel Jeřábek
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