Phase behaviour of amphiphilic side-chain polymers

Autor:	G. Brezesinski, Carsten Tschierske, N. Pietschmann, Horst Zaschke, Frank Kuschel
Rok vydání:	1989
Předmět:	chemistry.chemical_classification Materials science Mesophase General Chemistry Polymer Condensed Matter Physics Differential scanning calorimetry Chemical engineering chemistry Phase (matter) Amphiphile Side chain Organic chemistry General Materials Science Lamellar structure Alkyl
Zdroj:	Liquid Crystals. 5:1697-1709
ISSN:	1366-5855 0267-8292
DOI:	10.1080/02678298908045680
Popis:	The present study describes the phase behaviour of a low-molar-mass 1,3-diol with a linear alkyl chain in aqueous solution. From the combined results of differential scanning calorimetry and optical polarizing microscopy a phase diagram was constructed. The low-molar-mass diol forms a lamellar mesophase only in the presence of water. The influence of the linkage of the amphiphilic molecule to different polymer backbones on the stability of the mesophase was investigated. It is evident that amphiphilic side-chain polymers show a distinct stabilization of the mesophase. Moreover, comparison between the polyacrylate, polymethacrylate and polysiloxane indicates a strong influence of the main-chain flexibility on the stability of the liquid-crystalline phase. The type of the liquid-crystalline phase of the side-chain polyacrylate in the water-saturated state was identified by X-ray investigations as lamellar. The hydration behaviour of the polymers was investigated by 2H-N.M.R. and isopiestic measurem...
Databáze:	OpenAIRE
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