@article {godinho1993preparation,
	title = {Preparation and liquid-crystalline properties of toluene-4-sulphonyl urethane of hydroxypropylcellulose},
	journal = {Liquid Crystals},
	volume = {14},
	number = {3},
	year = {1993},
	pages = {653{\textendash}659},
	publisher = {Taylor \& Francis},
	abstract = {<p style="text-align:justify; font-size:12px; font-family:Helvetica">A novel liquid-crystalline polymer, the toluene-4-sulphonyl urethane of hydroxypropylcellulose (TSUHPC), was prepared through chemical modification of hydroxypropylcellulose (HPC) of Mw = 60000 g mol-1. The resulting polymer was characterized by infrared spectroscopy, differential scanning calorimetry (DSC) and polarizing microscopy. It was found that thermotropic liquid crystal phases are formed between about 60{\textdegree}C and 110{\textdegree}C. Concentrated solutions of TSUHPC in acetone and N,N-dimethylacetamide exhibit cholesteric behaviour, at room temperature. When approaching the lyotropic mesophase to solid transition, either by cooling or by solvent evaporation, very interesting arborescent structures of a seemingly fractal nature may be observed, depending on the kinetics of the transition. A banded texture can be observed when the polymer is sheared near the transition to the isotropic phase.</p>
},
	url = {http://www.tandfonline.com/doi/abs/10.1080/02678299308027744},
	author = {Godinho, Maria Helena and Borges, Jo{\~a}o Paulo and Bordado, Jo{\~a}o Carlos and Maria Teresa Cidade and Martins, Assis Farinha}
}
