Estimation of Glass Transition on Temperatures from Gas Chromatographic Studies on Polymers

Lavoie, A.; Guillet, J. E.

doi:10.1021/ma60010a027

Cited by 95 publications

(25 citation statements)

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“…The A samples have demonstrated the typical behaviour observed for bulk specimens for the retention of organic vapours over a wide temperature range. 9,10 The shape of the curve is consistent with three regions of retention. The low temperature linear region is the region of adsorption on a rigid substrate; no mixing or bulk diffusion occurs in this region.…”

Section: Results and Discussion Removal Of Sizing Agentsupporting

confidence: 62%

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Partlett

Thomas

2000

Polym. Int.

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Section: Results and Discussion Removal Of Sizing Agentsupporting

confidence: 62%

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Partlett

Thomas

2000

Polym. Int.

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“…The degree of crystallinity can be used in eq. [2] to calculate the Avrami parameters. Formally, the Avrami treatment refers to the volume fraction of crystallinity whereas IGC yields mass fraction values.…”

Section: Measurement Of Crystallization Kineticsmentioning

confidence: 99%

Investigation of mesophase transitions in liquid crystals using inverse gas chromatography

Price¹,

Shillcock²

1995

Can. J. Chem.

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Inverse Gas Chromatography, IGC, has been used to study phase transitions in three low molar mass liquid crystals and one side-chain liquid crystalline polymer. This extension of previous work has shown that transitions between all of the various mesophases can be detected and their temperatures measured with an accuracy and precision comparable to that of more conventional techniques. For one of the compounds, 4,4'-(n-hexyloxy)cyanobiphenyl, the kinetics of solidification from the supercooled nematic phase have been measured. The process took place in two stages which could be interpreted in terms of a modified version of the Avrami model of polymer crystallization. An explanation of the results is that the solid support is providing a large number of nucleation sites for the initial part of the solidification, which is completed in a slow, diffusionlimited process. However, further work is required to confirm this mechanism.Key words: inverse gas chromatography (IGC), liquid crystals, mesophase transitions, activity coefficients, retention volumes.Resume : On a utilisC la chromatographie en phase gazeuse inverse (IGC) pour Ctudier les transitions de phase de trois cristaux liquides de faibles masses molaires et d'un polymkre cristal-liquide avec chai'ne latCrale. Cette extension du travail prCcCdent a permis de dCmontrer que l'on peut dCtecter toutes les transitions entre les diverses mCsophases et de mesurer leurs tempkratures avec une exactitude et une prkcision comparables i celles des techniques plus conventionnelles. Pour l'un des composCs, le 4,4'-(n-hexyloxy)cyanobiphCnyle, on a mesurC la cinCtique de la solidification B partir de la phase nCmatique surrefroidie. Le processus se produit en deux Ctapes que l'on peut interpreter en fonction d'une version modifiCe du modkle d'Avrami de la cristallisation d'un polymkre. On peut expliquer les rksultats en supposant que le support solide fournit un grand nombre de sites de nuclCation pour la partie initiale de la solidification que est complCtCe par un processus lent, B diffusion limitCe. Toutefois, des travaux ultCrieurs seront nicessaires pour confirmer ce micanisme.

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“…This procedure was established by Guillet and his colleagues. [7][8][9][10][11] It is worth noting that there is only one case, [8] where the T g of PAN is measured by an IGC method.…”

Section: Introductionmentioning

confidence: 99%

Glass‐Transition Temperature (T_g) of Free‐Radically Prepared Polyacrylonitrile by Inverse Gas Chromatography, 1. A Study on T_g of Atactic Monodisperse Polystyrenes

Minagawa

Kanoh

Tanno

et al. 2002

Macro Chemistry & Physics

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The glass‐transition temperature (Tg) of several atactic monodisperse polystyrenes (PSt)s was studied by an inverse gas chromatographic (IGC) analysis, as a preliminary study for the detection of the Tg of polyacrylonitrile. The Tg of PSt with different molecular weights was clearly obtained by this method. The agreement in the Tg values obtained by IGC and by differential scanning calorimetry (DSC) was quite good within the molecular‐weight range Mp = 7 600–2 430 000 (where, Mp = (Mn × Mw)1/2). This method has a wide universality for the detection of the Tg of polymers. Several essential factors were extracted for the establishment of the optimum conditions for IGC measurements, such as the concentration of polymer toward a clay matrix (10 wt.‐%), and the type of lower probe, decane. The best probe was determined empirically from the most effective detection in the IGC measurements of PSt.Molecular‐weight dependence of the Tg of PSt. Experimental data obtained here are indicated by an arrow. Other data was taken from ref.21magnified imageMolecular‐weight dependence of the Tg of PSt. Experimental data obtained here are indicated by an arrow. Other data was taken from ref.21

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Estimation of Glass Transition on Temperatures from Gas Chromatographic Studies on Polymers

Cited by 95 publications

References 0 publications

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Investigation of mesophase transitions in liquid crystals using inverse gas chromatography

Glass‐Transition Temperature (T_g) of Free‐Radically Prepared Polyacrylonitrile by Inverse Gas Chromatography, 1. A Study on T_g of Atactic Monodisperse Polystyrenes

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Estimation of Glass Transition on Temperatures from Gas Chromatographic Studies on Polymers

Cited by 95 publications

References 0 publications

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Characterization of surface-modified poly(ethylene terephthalate) fibres by inverse gas chromatography

Investigation of mesophase transitions in liquid crystals using inverse gas chromatography

Glass‐Transition Temperature (Tg) of Free‐Radically Prepared Polyacrylonitrile by Inverse Gas Chromatography, 1. A Study on Tg of Atactic Monodisperse Polystyrenes

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Glass‐Transition Temperature (T_g) of Free‐Radically Prepared Polyacrylonitrile by Inverse Gas Chromatography, 1. A Study on T_g of Atactic Monodisperse Polystyrenes