摘要:

The heat capacity in the isotropic phase and the latent heat on the IN transition line have been measured in binary liquid crystal mixtures by high-resolution adiabatic calorimetry. It shown that an anomalous behaviour of the entropy jump on the IN phase transition line in the vicinity of the INA triple point is defined only by an particular behaviour of the crystallization fluctuations in the isotropic phase. The contribution of the crystallization fluctuations to the heat capacity is comparable with the pretransitional heat capacity of the nematic fluctuations in the isotropic phase.

ISSN:1058-725X    

DOI:10.1080/10587259208037273

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

Phase diagrams have been determined of systems composed of the compound BOBCAB and a binary mixture of a polar (nTPCHB) and non-polar (nMPCHB) compounds. It has been shown that extension of the smectic phase range and the appearance of the nematic reentrant phase connected with the dimerization of the BOBCAB component require an adequate length of the aliphatic chain of the matrix.

ISSN:1058-725X    

DOI:10.1080/10587259208037274

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

The soft mode, Goldstone mode and a new ferroelectric mode have been detected in the Sm C* phase of a fluorinated compound. The dielectric increment of the Goldstone mode found in the Sm G* phase is by about one order of magnitude tower in comparison with that found in the Sm C* phase. In addition to collective processes, in both chiral phases a biased reorientation of molecules around their long axes contributes to the dielectric increment.

ISSN:1058-725X    

DOI:10.1080/10587259208037275

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:1058-725X    

DOI:10.1080/10587259208037242

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor