Polyphosphazene Toughened PMR-type Thermosets

1996 ◽  
Vol 8 (3) ◽  
pp. 455-473 ◽  
Author(s):  
O L Abu-Shanab ◽  
C P Chang ◽  
M D Soucek
Keyword(s):  
Thin Films ◽  
Fracture Toughness ◽  
Oxidative Stability ◽  
Tensile Properties ◽  
Hybrid Systems ◽  
Structure Property ◽  
Interpenetrating Network ◽  
Polymeric Matrices ◽  
Grafted Copolymer ◽  
Structure Property Relationships

Two new polyphosphazenes, poly(4-maleimidophenoxy/phenoxy)phosphazene and poly(4-phthalimidophenoxy/phenoxy)phosphazene, were prepared and used to toughen a PMR polyimide designated LaRCTMRP46. These toughened polyimides were evaluated as thin films with a 0–40 wt% range of polyphosphazene to polyimide. The structure–property relationships of these inorganic/organic polymeric matrices were studied and evaluated in terms of fracture toughness, thermo-oxidative stability, and thermal, mechanical, and tensile properties. The hybrid systems revealed an increase in fracture toughness up to 20 wt% polyphosphazene load without any substantial loss in tensile properties. With 5 wt% poly(4-phthalimidophenoxy/phenoxy)phosphazene loading, the fracture toughness of the semi-interpenetrating network was increased by 124%. When 10 wt% poly(4- maleimidophenoxy/phenoxy)phosphazene loading was used, the fracture toughness of the grafted copolymer was improved by 217%. In addition, substantial enhancement in thermo-oxidative stability was also observed.

scholarly journals Structure—Property Relationships in Sol—Gel-Derived Thin Films

1994 ◽  
pp. 104-121 ◽  
Author(s):  
C. J. Brinker ◽  
N. K. Raman ◽  
M. N. Logan ◽  
R. Sehgal ◽  
R. A. Assink ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Structure Property ◽  
Structure Property Relationships

Development of Structure-Property Relationships in Disordered Zirconia Thin Films for High Energy Density Mim Capacitors

2006 ◽  
Vol 969 ◽  
Author(s):  
Guneet Sethi ◽  
Michael T. Lanagan ◽  
Eugene Furman ◽  
Mark W. Horn
Keyword(s):  
Thin Films ◽  
High Energy ◽  
Dc Conductivity ◽  
High Energy Density ◽  
Dielectric Films ◽  
Structure Property ◽  
Gate Oxides ◽  
Low Frequencies ◽  
Structure Property Relationships ◽  
Mim Capacitors

AbstractAmorphous zirconium oxide thin films were prepared by reactive magnetron sputtering. The dielectric films were characterized by impedance spectroscopy with temperature. The effect of annealing on capacitor performance was studied. Annealing gold electroded thin films at 250°C greatly reduced the losses with little changes in crystallinity. Space charge relaxation started to appear at 190°C. The activation energy for the relaxation was 0.84 eV with a very low relaxation frequency at room temperature (0.23μHz). Electrode effects dominated at very low frequencies at all temperatures. AC conductivity followed the universality behavior for the AC charge transport showing that the films are highly disordered. No DC conductivity regime was observed indicating that DC conductivity is very low. DC conductivity of the films was of the order of 10−13 S/m, which is lesser than the comparable thickness high quality gate oxides.

scholarly journals Structure-property relationships for Eu doped TiO2 thin films grown by a laser assisted technique from colloidal sols

RSC Advances ◽  
2017 ◽  
Vol 7 (60) ◽  
pp. 37643-37653 ◽  
Author(s):  
I. Camps ◽  
M. Borlaf ◽  
M. T. Colomer ◽  
R. Moreno ◽  
L. Duta ◽  
...  
Keyword(s):  
Thin Films ◽  
Structure Property ◽  
Tio2 Thin Films ◽  
Doped Tio2 ◽  
Structure Property Relationships

Highly photoluminescent Eu doped TiO2 layers prepared by laser-based technique from colloidal sols.

A Comparative Study of the Structure/Property Relationships of Langmuir-Blodgett and Spin-Cast Films of an Amphiphilic, Regioregular Polythiophene Polymer

2006 ◽  
Vol 949 ◽  
Author(s):  
Jusroop Mattu ◽  
Thomas Johansson ◽  
Steven Holdcroft ◽  
Gary W. Leach
Keyword(s):  
Thin Films ◽  
Comparative Study ◽  
Conjugated Polymer ◽  
Structure Property ◽  
Materials Properties ◽  
Langmuir Blodgett ◽  
Thermal Reactivity ◽  
Structure Property Relationships ◽  
Structural Conformation ◽  
Cast Films

ABSTRACTThe effects of structural conformation and order on materials properties and reactivity in thin films of an amphiphilic, regioregular polythiophene π-conjugated polymer (πCP) derivative are presented. Thin films deposited by the Langmuir Blodgett technique provide highly ordered anisotropic films compared to those deposited by spin cast methods. Large differences in both the thermal reactivity and physical properties of the films are observed.

Structure-property relationships in thin films and membranes

1995 ◽  
Vol 4 (2) ◽  
pp. 117-133 ◽  
Author(s):  
C. J. Brinker ◽  
N. K. Raman ◽  
M. N. Logan ◽  
R. Sehgal ◽  
R. -A. Assink ◽  
...  
Keyword(s):  
Thin Films ◽  
Structure Property ◽  
Structure Property Relationships
Sign in / Sign up

Export Citation Format

Share Document