Constrained-Layer Damping with Gradient Polymers for Effectiveness over Broad Temperature Ranges

AIAA Journal ◽  
2007 ◽  
Vol 45 (8) ◽  
pp. 1885-1893 ◽  
Author(s):  
Farhan Gandhi ◽  
Chrystel Remillat ◽  
Geof Tomlinson ◽  
Julien Austruy
Keyword(s):  
Constrained Layer Damping ◽  
Temperature Ranges ◽  
Gradient Polymers

Optical and Electrical Properties of Organic Conducting Polymers

2014 ◽  
Vol 8 (1) ◽  
pp. 1457-1463
Author(s):  
Salah Abdulla Hasoon
Keyword(s):  
Electrical Properties ◽  
Conjugated Polymer ◽  
Polymeric Materials ◽  
Quantum Mechanical ◽  
Optical And Electrical Properties ◽  
Electrically Conducting ◽  
Temperature Ranges ◽  
Lithium Tetrafluoroborate ◽  
Absorbance Peak ◽  
Polymerization Method

Novel electrically conducting polymeric materials are prepared in this work. Polythiophene (PT) and poly (3-Methelthiophene) (P3MT) films were prepared by electro-polymerization method using cyclic voltammetry in acetonitrile as a solvent and lithium tetrafluoroborate as the electrolyte on a gold electrode. Electrical properties of P3MT have been examined in different environments using UV-Vis absorption spectroscopy and quantum mechanical ab initio calculations, The observed absorption peaks at 314 and 415 nm, were attributed to the n-π* and π-π* transitions, respectively in the conjugated polymer chain, in contrast, the observed absorbance peak at 649 nm, is responsible for electric conduction. The temperature dependence of the conductivity can be fitted to the Arrhenius and the VTF equations in different temperature ranges.

CARPENTER LOW EXPANSION 39

Alloy Digest ◽  
2004 ◽  
Vol 53 (10) ◽  
Keyword(s):  
Thermal Expansion ◽  
Physical Properties ◽  
Tensile Properties ◽  
Iron Alloy ◽  
Nickel Iron ◽  
Temperature Ranges ◽  
Technology Corporation ◽  
Carpenter Technology Corporation ◽  
Nickel Iron Alloy ◽  
Low Rate

Abstract Carpenter Low Expansion 39 alloy is a 39% nickel iron alloy with a low rate of thermal expansion useful to temperature ranges up to 316 deg C (600 deg F). This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on joining. Filing Code: FE-132. Producer or source: Carpenter Technology Corporation.

Sign in / Sign up

Export Citation Format

Share Document