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Nanostructure and Thermal Behaviour of Liquid Crystalline Oligoester

100%

Janicki J.

Acta Physica Polonica A

2002

vol. 101

issue 5

761-766

The nanostructure and thermal behaviour of liquid crystalline oligoester were examined by combination of real-time synchrotron small-angle and wide-angle X-ray scattering methods with differential scanning calorimetry. The synthesized oligoester exhibits ability to form a thermotropic mesophase. It was shown that solid crystalline state is observed in the temperature range 25 to 123ºC and liquid crystalline state between 118-156ºC. The transition temperature determined from dynamic small-angle and wide-angle X-ray scattering experiments agrees very well with the results obtained from differential scanning calorimetry.

Small-Angle X-Ray Scattering Studies of Pore Structure in Cellulose Membranes

51%

Ślusarczyk C., Fryczkowska B., Sieradzka M., Janicki J.

Acta Physica Polonica A

2016

vol. 129

issue 2

229-232

Small-angle X-ray scattering experiments were carried out on cellulose membranes obtained by phase inversion from a solution of the polymer in 1-ethyl-3-methylimidazolium acetate, by coagulation in water and selected primary alcohols. The invariant, Q, and the Guinier radius, R_{G}, computed directly from the small-angle X-ray scattering curve allowed us to estimate the pore dimensions and the pore volume fraction. It was found that both content and dimensions of pores depend on molecular mass of the coagulant used. Also, it was found that the dipole moment of coagulant molecules has a large influence on the volume content of the pores.

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2 Acta Physica Polonica A

1 2016

1 2002

2 Janicki J.

1 Fryczkowska B.

1 Sieradzka M.

1 Ślusarczyk C.

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Nanostructure and Thermal Behaviour of Liquid Crystalline Oligoester

Small-Angle X-Ray Scattering Studies of Pore Structure in Cellulose Membranes