𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and characterization of thermotropic liquid crystalline poly(ester imide)s

✍ Scribed by Dewen Dong; Huiyan Zhuang; Guang Li; Yushan Ni; Mengxian Ding

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
230 KB
Volume
37
Category
Article
ISSN
0887-624X

No coin nor oath required. For personal study only.

✦ Synopsis

Two closely series of poly(ester imide)s had been synthesized by solution polycondensation of p-phenylenebis(trimellitate) dianhydride with aliphatic diamines. The differential scanning calorimetry (DSC) traces of the most poly(ester imide)s exhibited two endotherms representing the solid state to anisotropic phase transition (T m1 ) and the anisotropic to isotropic melt transition (T m2 ), respectively. Observation under polarizing microscope and wide-angle X-ray diffraction (WAXD) measurements suggested that the anisotropic phase formed above the melting points (T m1 ) had a smectic character. The thermogravimetric analyses (TGA) revealed that the thermal stabilities of the poly(ester imide)s were up to 350Β°C.

πŸ“œ SIMILAR VOLUMES

Synthesis and characterization of novel
Synthesis and characterization of novel thermotropic liquid crystalline copoly(ester imide)s
✍ Tsia-Fa Hsu; Yu-Chih Lin; Yu-Der Lee πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 384 KB πŸ‘ 2 views

Novel liquid crystalline copoly(ester imide)s were synthesized via polyesterification of triethyleneglycol bis(4-carboxyphenyl) ether ( 1e), diacetoxybiphenyl, and diacids with imide moieties. The effects of composition on the changes of T g , T m , and T i were examined by global TSC and DSC. Therm

Synthesis and characterization of choles
Synthesis and characterization of cholesteric thermotropic liquid crystalline polyesters
✍ Sushilkumar A. Jadhav; Rahul R. Chougule; Yogesh A. Shinde; N. N. Chavan πŸ“‚ Article πŸ“… 2006 πŸ› John Wiley and Sons 🌐 English βš– 439 KB

## Abstract Cholesteric liquid crystalline polyesters were successfully synthesized from isosorbide, methyl hydroquinone, and isophthaloyl chloride. Homo/copolyesters were synthesized by the solution polycondensation method, for which a mild organic base such as pyridine was employed. Inherent visc

Dielectric relaxation of LC-thermotropic
Dielectric relaxation of LC-thermotropic poly(ester imide)s
✍ Javier de Abajo; JosΓ© G. de la Campa; Angel AlegrΓ­a; JosΓ© M. Echave πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 253 KB πŸ‘ 1 views

Two different series of poly(ester imide)s, which are distinguished from each other in the orientation of the ester linkages and show well-differentiated thermotropic behavior, are investigated by means of model calculations and dielectric relaxation spectroscopy. Model calculations show that the or