Struktur und eigenschaften von ABS‐polymeren. VIII. Das elutionsverhalten von homo‐ und copolymeren aus styrol und acrylnitril in der gelchromatographie. Aufstellung einer eichkurve für lösungsmittel unterschiedlicher güte

Kranz, Von Dietmar; Pohl, Horand Uwe; Baumann, Helmuth

doi:10.1002/apmc.1972.050260106

Cited by 28 publications

(9 citation statements)

References 16 publications

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“…A similar observationwas reported on changing from chloreform to DMF (13) and from tetrahydrofUran to DMF (14). Methyl ethyl ketone and DMF (a = 0.60 -0.64) are poor solvents for polystyrene, and in GPC separations with these eluents the plot of log hydrodynamic volume versus VR for polystyrene is displaced to high VR with respect to a plot for,another polymer for wnich these same eluents are good solvents (13,15). Similar results have been reported for polystyrene at 35°C in the thetasolvent cyclohexane (15,17,18).…”

Section: Results and Disgussionsupporting

confidence: 86%

“…Fora simple pore structure, the total internal pore volume Vi is related to the surface area S by vi = y r s/2 (12) where r is the average pore size of the pore size distribution and y is a numerical factor which depends on the pore geometry and on the definition of mean pore size (28). Weshall therefore assume that S is directly proportional to V., so that in equation (11) (4), (5) and (11) suggests that KP is given by (13) where KP is the distribution coefficient for polymer-sorbent interaction and will.be · greater than unity when polymer is retarded in the stationary phase. In a somewhat simpler thermodynamic interpretation of a network-limited GPC Separation (29), it was suggested that KP is determined by an enthalpy contribution, i.e.…”

Section: Thermodyeamic Interpretationmentioning

confidence: 99%

“…GPC Separations with dimethylformamide (DMF) which is widely used as an eluent for polar synthetic polymers are influenced by polymer-sorbent interaction (10). In particular, the displacement of hydrodynamic volume calibration curves for polystyrene with respect to curves for other polymers in DMF has been observed with separations on crosslinked polystyrene gels (10)(11)(12)(13)(14). DMF is a poor solvent for linear polystyrene with a values between 0.60 and 0.64.…”

Section: Introductionmentioning

confidence: 99%

“…DMF is a poor solvent for linear polystyrene with a values between 0.60 and 0.64. Consequently, deviations from the universal calibration J • V • DAWKINS plot of hydrodynamic volume for crosslinked polystyrene gels have been observed with organic eluents having a in the range 0.5 -0.7 and values of 6 either less than or greater than that for polystyrene (10)(11)(12)(13)(14)(15)(16)(17)(18)(19). In one of the first attempts to show that GPC Separations with porous glass were size dependent (20), the plot of log polymer size versus VR was influenced by eluent polarity.…”

Section: Introductionmentioning

confidence: 99%

“…When the solute is polystyrene (~1 = 9.1) in an eluent such that ~1 and ~2 are very different, giving a < 0.1, e.g. cyclohexane (~1 = 8.2) in Figure 1 and DMF as eluent (10)(11)(12)(13)(14), then ~ for polystyrene is greater than unity.…”

mentioning

confidence: 99%

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Theory of gel permeation chromatography. Mechanism of separation and the influence of polymer-sorbent interaction

Dawkins¹

1979

Pure and Applied Chemistry

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-The displacement of hydrodynamic volume universal calibration curves to high retention volumes for some polymer-solvent systems in gel permeation chromatography is explained in terms of a network-limited separation consisting of a steric exclusion mechanism and a second mechanism resulting from polymer-sorbent interaction. This treatment is consistent with a thermodynamic interpretation of gel permeation chromatography in which the distribution coefficient (~ 1.0) for polymer-sorbent interaction is determined by an enthalpy change for polymer partition or polymer adsorption in the porous packing. Experimental data obtained with crosslinked polystyrene gels and inorganic packings may be represented by the network-limited treatment. Separations in which the distribution coefficient for polymer-sorbent interaction is less than unity correspond to partial exclusion by polymer incompatibility with the sorbent.

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Section: Results and Disgussionsupporting

confidence: 86%

Section: Thermodyeamic Interpretationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Theory of gel permeation chromatography. Mechanism of separation and the influence of polymer-sorbent interaction

Dawkins¹

1979

Pure and Applied Chemistry

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Acrylonitrile Polymers, ABS Resins

Kulich¹,

Pace²,

Fritch³

et al. 2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Acrylonitrile–butadiene–styrene (ABS) polymers are composed of elastomer dispersed as a grafted particulate phase in a thermoplastic matrix of styrene and acrylonitrile copolymer (SAN). The presence of SAN grafted onto the elastomeric component, usually polybutadiene or a butadiene copolymer, compatabilizes the rubber with the SAN component. Property advantages provided by this graft terpolymer include excellent toughness, good dimensional stability, good processibility, and chemical resistance. The system is structurally complex. This allows considerable versatility in the tailoring of properties to meet specific product requirements. Consequently, research and development in ABS systems is active. Numerous grades of ABS are available, including new alloys and specialty grades for high heat, flaming‐retardant, or static dissipative product requirements. Good chemical resistance combined with the relatively low water absorptivity \documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}${{(}{\rm{<}}1{\%}{)}}$\end{document} results in high resistance to staining agents. Antioxidants substantially improve oxidative stability. Applications involving extended outdoor exposure require the use of stabilizing additives, pigments, and protective coatings. In manufacturing, grafting is achieved by the free‐radical copolymerization of styrene and acrylonitrile monomers. The three commercial processes for manufacturing ABS are emulsion, mass, and mass‐suspension. ABS is sold as an unpigmented product for on‐line coloring using color concentrates during molding, or as precolored pellets. ABS can be processed by compression and injection molding, extrusion, calendering, and blow‐molding. Post‐processing operations include cold forming, painting, and adhesive bonding. As a “bridge” polymer between commodity plastics and higher performance engineering thermoplastics, ABS has become the largest selling engineering thermoplastic.

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Acrylonitrile–Butadiene–Styrene (ABS) Polymers

Kulich¹,

Gaggar²,

Lowry³

et al. 2003

Kirk-Othmer Encyclopedia of Chemical Technology

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Acrylonitrile–butadiene–styrene (ABS) polymers are composed of elastomer dispersed as a grafted particulate phase in a thermoplastic matrix of styrene and acrylonitrile copolymer (SAN). The presence of SAN grafted onto the elastomeric component, usually polybutadiene or a butadiene copolymer, compatabilizes the rubber with the SAN component. Property advantages provided by this graft terpolymer include excellent toughness, good dimensional stability, good processibility, and chemical resistance. The system is structurally complex. This allows considerable versatility in the tailoring of properties to meet specific product requirements. Consequently, research and development in ABS systems is active. Numerous grades of ABS are available, including new alloys and specialty grades for high heat, flaming‐retardant, or static dissipative product requirements. Good chemical resistance combined with the relatively low water absorptivity \documentclass{article}\usepackage{amssymb}\pagestyle{empty}\begin{document}${(<1\%)}$\end{document} results in high resistance to staining agents. Antioxidants substantially improve oxidative stability. Applications involving extended outdoor exposure require the use of stabilizing additives, pigments, and protective coatings. In manufacturing, grafting is achieved by the free‐radical copolymerization of styrene and acrylonitrile monomers. The commercial processes for manufacturing ABS are discussed. ABS is sold as an unpigmented product for on‐line coloring using color concentrates during molding, or as precolored pellets. ABS can be processed by compression and injection molding, extrusion, calendering, and blow‐molding. Post‐processing operations include cold forming, painting, and adhesive bonding. As a “bridge” polymer between commodity plastics and higher performance engineering thermoplastics, ABS has become the largest selling engineering thermoplastic.

show abstract

Struktur und eigenschaften von ABS‐polymeren. VIII. Das elutionsverhalten von homo‐ und copolymeren aus styrol und acrylnitril in der gelchromatographie. Aufstellung einer eichkurve für lösungsmittel unterschiedlicher güte

Cited by 28 publications

References 16 publications

Theory of gel permeation chromatography. Mechanism of separation and the influence of polymer-sorbent interaction

Theory of gel permeation chromatography. Mechanism of separation and the influence of polymer-sorbent interaction

Acrylonitrile Polymers, ABS Resins

Acrylonitrile–Butadiene–Styrene (ABS) Polymers

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