High-Temperature Aromatic Polyesters of p-Hydroxybenzoic Acid and Their Copolyesters

2011 ◽  
pp. 93-103 ◽  
Author(s):  
James Economy ◽  
Zeba Parkar
Keyword(s):  
High Temperature ◽  
Hydroxybenzoic Acid ◽  
Aromatic Polyesters

A Monte Carlo Simulation of the High-Temperature Phases of Poly(p-hydroxybenzoic acid)

1995 ◽  
Vol 28 (21) ◽  
pp. 7075-7084 ◽  
Author(s):  
Stephen H. Foulger ◽  
Gregory C. Rutledge
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
High Temperature ◽  
Hydroxybenzoic Acid

Synthesis and modification of aromatic polyesters with chloroacetyl 3,5-dibromo-p-hydroxybenzoic acid

2009 ◽  
Vol 111 (4) ◽  
pp. 1755-1762 ◽  
Author(s):  
Sedat Ozden ◽  
A. M. Charayev ◽  
R. C. Bazheva
Keyword(s):  
Hydroxybenzoic Acid ◽  
Aromatic Polyesters

High-temperature structures of poly(p-hydroxybenzoic acid)

1990 ◽  
Vol 23 (6) ◽  
pp. 1793-1799 ◽  
Author(s):  
Do Y. Yoon ◽  
Norberto Masciocchi ◽  
Laura E. Depero ◽  
Christopher Viney ◽  
William Parrish
Keyword(s):  
High Temperature ◽  
Hydroxybenzoic Acid

The Catalytic Synthesis of Wholly Aromatic Polyesters Based on 4-hydroxybenzoic Acid via Direct Esterification

2020 ◽  
Vol 869 ◽  
pp. 112-118
Author(s):  
Timur R. Deberdeev ◽  
Alsu I. Akhmetshina ◽  
Liana K. Karimova
Keyword(s):  
Phase Transition ◽  
Molecular Weight ◽  
High Performance ◽  
Crystalline State ◽  
Average Molecular Weight ◽  
Practical Importance ◽  
Catalytic Synthesis ◽  
Hydroxybenzoic Acid ◽  
Direct Esterification ◽  
Aromatic Polyesters

The synthesis and properties of wholly aromatic polyesters are of considerable practical importance to create functional and high-performance materials. In the present study, by means of catalytic polyesterification using titanium (IV) butoxide, we’ve synthesized wholly aromatic oligomers derived from 4-hydroxybenzoic acid (HBA), aromatic diacids and dibasic phenols. As revealed by FTIR measurements, the average molecular weight of oligomers has varied from 500 to 1400. The results of DSC have shown endotherm peaks attributed to a phase transition of low-molecular oligomers from crystalline state to mesophase and further isotropization. The synthesized oligomers were resistant to high temperatures up to about 300-320 °C.

Conformations and rotational barriers of aromatic polyesters. 3. AM1-based parametrization of a force field for poly(p-hydroxybenzoic acid) and for poly(6-hydroxy-2-naphthoic acid)

1993 ◽  
Vol 26 (7) ◽  
pp. 1555-1563 ◽  
Author(s):  
Jippe Van Ruiten ◽  
Robert J. Meier ◽  
Christoph Hahn ◽  
Thomas Mosell ◽  
Alla Sariban ◽  
...  
Keyword(s):  
Force Field ◽  
Hydroxybenzoic Acid ◽  
Rotational Barriers ◽  
Naphthoic Acid ◽  
Aromatic Polyesters

Influence of Thermo-Mechanical Processing on the Microstructure of Beryllia Dispersed Nickel Alloys

1973 ◽  
Vol 31 ◽  
pp. 184-185
Author(s):  
M.S. Grewal ◽  
S.A. Sastri ◽  
N.J. Grant
Keyword(s):  
High Temperature ◽  
Nickel Alloys ◽  
Thermomechanical Processing ◽  
Cold Work ◽  
High Temperature Strength ◽  
Strengthening Effect ◽  
Mechanical Processing ◽  
Uniform Dispersion ◽  
Oxide Particles ◽  
Nickel Base

Currently there is a great interest in developing nickel base alloys with fine and uniform dispersion of stable oxide particles, for high temperature applications. It is well known that the high temperature strength and stability of an oxide dispersed alloy can be greatly improved by appropriate thermomechanical processing, but the mechanism of this strengthening effect is not well understood. This investigation was undertaken to study the dislocation substructures formed in beryllia dispersed nickel alloys as a function of cold work both with and without intermediate anneals. Two alloys, one Ni-lv/oBeo and other Ni-4.5Mo-30Co-2v/oBeo were investigated. The influence of the substructures produced by Thermo-Mechanical Processing (TMP) on the high temperature creep properties of these alloys was also evaluated.

Sign in / Sign up

Export Citation Format

Share Document