Calorimetric study of the Paranematic-to-Nematic transition of polydomain side-chain liquid-crystalline elastomers with different mesogen composition

被引：1

作者：

Cordoyiannis, G. ^{[1
,2
]}

Rozic, B. ^{[1
]}

Finkelmann, H. ^{[3
]}

Zumer, S. ^{[1
,4
]}

Kutnjak, Z. ^{[1
]}

机构：

[1] Jozef Stefan Inst, Dept Condensed Matter Phys, Ljubljana 1000, Slovenia

[2] EN FIST Ctr Excellence, Ljubljana 1000, Slovenia

[3] 056 Albert Ludwigs Univ Freiburg, Inst Makromol Chem, D-79104 Freiburg, Germany

[4] Univ Ljubljana, Dept Phys, Ljubljana 1000, Slovenia

来源：

EUROPEAN PHYSICAL JOURNAL E | 2010年 / 32卷 / 03期

关键词：

BEHAVIOR; MODEL;

D O I：

10.1140/epje/i2010-10632-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase transition behaviour of various nematic side-chain liquid-crystalline elastomers with different mesogen composition has been explored by means of high-resolution ac calorimetry. Polydomain samples of the same crosslinking density and different type of mesogens have been investigated. The results show a strong dependence of the phase transition features upon the composition of the mesogen. The distance from the critical point, reflected in the sharpness of the heat capacity anomalies, increases when adding a shorter-length mesogen. The results provide new insight for the impact of mesogens on the thermodynamic behaviour and, thus, on the thermomechanical response of nematic liquid-crystalline elastomers.

引用

页码：243 / 247

页数：5