EFFECT OF THE ORIENTATION OF THE ESTER BONDS ON THE PROPERTIES OF 3 ISOMERIC LIQUID-CRYSTAL DIACRYLATES BEFORE AND AFTER POLYMERIZATION

Citation
Ram. Hikmet et al., EFFECT OF THE ORIENTATION OF THE ESTER BONDS ON THE PROPERTIES OF 3 ISOMERIC LIQUID-CRYSTAL DIACRYLATES BEFORE AND AFTER POLYMERIZATION, Macromolecules, 28(9), 1995, pp. 3313-3327
Citations number
19
Categorie Soggetti
Polymer Sciences
Journal title
ISSN journal
00249297
Volume
28
Issue
9
Year of publication
1995
Pages
3313 - 3327
Database
ISI
SICI code
0024-9297(1995)28:9<3313:EOTOOT>2.0.ZU;2-2
Abstract
Three is isomeric liquid crystal (LC) acrylates 4-((6-(acryloyloxy)hex yl)oxy)benzoyl)-oxy)benzene, oyloxy)hexyl)oxy)benzoyl)oxy)benzoyl)oxy) -benzene, and bis(4-((6-(acryloyloxy)hexyl)oxy)phenyl) terephthalate w ere synthesized. The orientation of the ester links with respect to th e central phenyl ring has a strong influence on the phase, optical, an d dielectric behavior of the monomers. The polymerization behavior of the isomers was found to differ. Changes occurring in the microstructu re during polymerization were studied using X-ray diffraction. In orde r to obtain an understanding of the observed differences, the phase be havior and polymerization behavior of various mixtures were studied. T he results of the experiments and the molecular modeling suggested tha t the associations between the molecules is the origin of the formatio n of observed LC phases and the strength of the interactions determine whether the microstructure is preserved during polymerization.