Relative behaviour of sound absorption and dispersion near the nematic-smectic-A phase transition in TBBA and CBOOA : comment and new results

Martinoty, P.

doi:10.1051/jphyslet:019790040013029100

Cited by 10 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This point is illustrated in ref. [24] for the A-N transition in CBOOA and TBBA. Of course, in the vicinity of the transition, more complicated behaviour is expected due, for example, to mode-coupling between the order parameter and the hydrodynamic shear mode [25], or to fluctuation effects whose wave numbers are much greater than ç -1 [12].…”

Section: Discussionmentioning

confidence: 99%

Ultrasonic study of the nematic-isotropic phase transition in PAA

Thiriet

Martinoty

1979

J. Phys. France

Self Cite

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

Section: Discussionmentioning

confidence: 99%

Ultrasonic study of the nematic-isotropic phase transition in PAA

Thiriet

Martinoty

1979

J. Phys. France

Self Cite

View full text Add to dashboard Cite

show abstract

Elastic constants of nematic liquid crystalline Schiff’s bases

Leenhouts

Dekker

1981

The Journal of Chemical Physics

View full text Add to dashboard Cite

The three elastic constants of a number of structurally related nematic liquid crystalline Schiff's bases have b~e~ m~as~red as ~ function of temperature. The results are new in the sense that they exhibit a clear dlstmctlOn m behavIOr between compounds with a rigid molecular structure and compounds with a molecular structure consisting of a rigid core and a flexible alkyl chain. In particular, it has been found that the ratio of the bend and splay elastic constants K /K I increases for compounds with a rigid molecular structure with increasing length to width ratio. This trend is the reverse of that observed wihin homologous series, for which K 31 K I has been found to decrease with increasing length of the alkyl chain. New is the experimental finding t~at the twist e1as.tic constant K 2 of the homologs studied is in~pendent of the length of the alkyl chain.Fmally, the expenments show that the average elastic constant K = (K I + K 2 + K 3)/3 is proportional to the smectic-isotropic transition temperature. The results can only be partly understood within the framework of existing theoretical models.

show abstract