Inverse gas chromatography for identification of poly(ethylene glycol adipate) and tripropionitrilamine on the surface of polymeric sorbent

A set of 16 inexpensive and commercially available polymer precipitants were tested for protein crystallization. Eight of them were found suitable: polyethylene glycol dimethyl ether of molecular weight (MW) 500, 1000 and 2000; di[poly(ethylene glycol)] adipate, MW 900; poly(ethylene glycol-ran-propylene glycol), MW 2500 and 12000; poly(acrylic acid) sodium salt, MW 2100; and polyethylene glycol methyl ether methacrylate, MW 1100. Two new crystallization screens, PolyA and PolyB, were formulated using these eight polymers, each containing 96 solutions – four polymers in combination with 24 common salts and buffers, covering pH values from 4.5 to 9.0. The screens were tested on 29 proteins, 21 of which were crystallized. The tests confirmed the applicability of the eight polymers as precipitants for protein crystallization.

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Dynamic mechanical analysis of fibre-reinforced plastic composites based on carboxyl terminated poly(ethylene glycol) adipate modified epoxy and E glass fibre

Polymer International ◽

10.1002/1097-0126(200008)49:8<815::aid-pi458>3.0.co;2-p ◽

2000 ◽

Vol 49 (8) ◽

pp. 815-819 ◽

Cited By ~ 10

Author(s):

D Ratna ◽

T?K Chongdar ◽

B?C Chakraborty

Keyword(s):

Ethylene Glycol ◽

Glass Fibre ◽

Mechanical Analysis ◽

Glycol Adipate ◽

Poly Ethylene Glycol ◽

Plastic Composites ◽

Ethylene Glycol Adipate ◽

Reinforced Plastic ◽

Poly Ethylene ◽

Modified Epoxy

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Dispersive Surface Energy and Acid-Base Parameters of Tosylate Functionalized Poly(ethylene glycol) via Inverse Gas Chromatography

Journal of Chemistry ◽

10.1155/2014/402325 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Feyza Sesigur ◽

Dolunay Sakar ◽

Ozlem Yazici ◽

Fatih Cakar ◽

Ozlem Cankurtaran ◽

...

Keyword(s):

Gas Chromatography ◽

Free Energy ◽

Ethylene Glycol ◽

Inverse Gas Chromatography ◽

Basic Medium ◽

Poly Ethylene Glycol ◽

Dispersive Component ◽

Dispersive Surface Energy ◽

Base Parameters ◽

Poly Ethylene

An inverse gas chromatographic (IGC) study of the sorption properties of poly(ethylene glycol) modified with tosylate (PEG-TOS) was presented. PEG-TOS was synthesized via the tosylation of the corresponding poly(ethylene glycol) (PEG) withp-toluenesulfonyl chloride in the basic medium. The synthesized PEG-Tos was characterized by FTIR-ATR and1HNMR techniques. The retention diagrams of n-hexane, n-heptane, n-octane, n-nonane, n-decane, dichloromethane, chloroform, acetone, tetrahydrofuran, ethyl acetate, and ethanol on the PEG and PEG-Tos were plotted at temperatures in K between 303 and 373 by inverse gas chromatography technique. The dispersive component of the surface-free energy,γSD, of studied adsorbent surface was estimated using retention times of different nonpolar organics in the infinite dilution region. Thermodynamic parameters of adsorption (free energy,ΔGAS, enthalpy,ΔHAS, and entropy,ΔSAS), dispersive components of the surface energies,γSD, and the acid,KA, and base,KD, constants for the PEG and PEG-Tos were calculated and the results were discussed.

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