scholarly journals An optical technique based mark tracking for electrical field induced mechanical strain measurement in thin polymer films

2007 ◽  
Vol 4 (2) ◽  
pp. 161-169
Author(s):  
B. Zegnini ◽  
L. Boudou ◽  
Martinez Vega
Keyword(s):  
Electric Field ◽  
Mechanical Response ◽  
Amorphous Material ◽  
Mechanical Strain ◽  
Test Results ◽  
Thin Polymer Films ◽  
Scanning Calorimetry ◽  
Insulating Films ◽  
Thin Polymer ◽  
Electric Field Induced Strain

An optical non contact measurement technique based on the tracking of successive positions of computerized markers has been developed which enables one to characterize the electric field induced strain response of the plane gold-metalized surfaces in thin organic insulating films. The present study was made on two microstructures of films: a virgin amorphous material and some semi-crystalline samples 70?m thick were obtained by annealing the amorphous one at annealing temperatures of 170?C at 5, 60 and 120 minutes using Differential Scanning Calorimetry (DSC). The test results demonstrate that the newly developed method is capable of detecting displacement of selected markers when the sample is subjected to the application of a dc high voltage. The field-induced mechanical strain measurements have been performed as a function of time and then analyzed with respect to the applied electric field. The observed strain levels varied from ~ 10-3 to 10-2. Moreover the influence of crystallinity on the electric field induced strain mechanical response is discussed.

The Elastic Mechanical Response of Supported Thin Polymer Films

Langmuir ◽  
2014 ◽  
Vol 30 (50) ◽  
pp. 15200-15205 ◽  
Author(s):  
Peter C. Chung ◽  
Emmanouil Glynos ◽  
Peter F. Green
Keyword(s):  
Polymer Films ◽  
Mechanical Response ◽  
Thin Polymer Films ◽  
Thin Polymer

Parametric Study on Electric Field-Induced Micro-/Nanopatterns in Thin Polymer Films

Langmuir ◽  
2018 ◽  
Vol 34 (14) ◽  
pp. 4188-4198 ◽  
Author(s):  
Fenhong Song ◽  
Dapeng Ju ◽  
Fangwei Gu ◽  
Yan Liu ◽  
Yuan Ji ◽  
...  
Keyword(s):  
Electric Field ◽  
Polymer Films ◽  
Parametric Study ◽  
Thin Polymer Films ◽  
Thin Polymer

Analytical Test Methods Used to Characterize Granular Composite Sport Surface Materials

2013 ◽  
Vol 440 ◽  
pp. 74-81 ◽  
Author(s):  
J.W. Bridge ◽  
C.A. Mahaffey ◽  
M.L. Peterson
Keyword(s):  
Mechanical Response ◽  
Chemical Properties ◽  
Test Methods ◽  
Test Results ◽  
Scanning Calorimetry ◽  
Granular Composite ◽  
Analytical Test ◽  
Surface Materials ◽  
Maintenance Decisions ◽  
Water Holding

Thoroughbred horse racetracks consisting of granular composite materials, also referred to as synthetic tracks, were developed for the racing industry with the goal of increasing safety to horses and jockeys and reducing maintenance efforts. These granular composites consist of sand, polymer fiber, and rubber bound together with a high-oil wax binder. The mechanical properties of these surfaces are significantly influenced by material composition, environmental factors, and surface maintenance procedures, and are susceptible to both environmental and mechanical-induced degradation over time. Using a combination of material analytical tests, surface mechanical and chemical properties and changes to them are assessed. Tests used to characterize the surface materials composition include Soxhlet wax extraction, wax oil extraction and sand morphology. Additionally, water-holding capacity, wax differential scanning calorimetry (DSC), gas chromatography (GC), Fourier transform infrared spectroscopy (FTIR), and x-ray fluorescence (XRF) provide insight to the thermal mechanical response of these surfaces as temperature and track composition/conditions change. Pertinent test results for two U.S. synthetic racetracks are included in this work to demonstrate the practicality of using this suite of testing. These tests and results provide a basis for racetrack maintenance decisions with the goal of achieving a more consistent racing surface that should ultimately reduce equine, and by extension jockey, injuries.

Is the chain dynamics in thin polymer films isotropic ?

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-233-Pr7-237 ◽  
Author(s):  
S. Rivillon ◽  
P. Auroy ◽  
B. Deloche
Keyword(s):  
Polymer Films ◽  
Thin Polymer Films ◽  
Chain Dynamics ◽  
Thin Polymer

Surface Modification of Poly (alkyl/Arylphosphazene) Thin Films

2000 ◽  
Vol 629 ◽  
Author(s):  
John V. St. John ◽  
Patty Wisian-Neilson
Keyword(s):  
Thin Films ◽  
Surface Modification ◽  
Chemical Resistance ◽  
Chemical Properties ◽  
Inorganic Polymers ◽  
Thin Polymer Films ◽  
Hydrophilic Interactions ◽  
Carboxylic Acid Groups ◽  
Polymer Interface ◽  
Thin Polymer

ABSTRACTPoly (methylphenylphosphazene) (PMPP) is an example of a unique class of inorganic polymers with alternating – (P=N)– backbones. Chemical modification of bulk PMPP can result in changes of physical properties such as chemical resistance, onset temperature of thermal degradation, elasticity, and flexibility. Surface modification of PMPP allows tailoring of the chemical properties at the polymer interface while maintaining the integrity of the bulk polymer. In this research, PMPP thin films were treated to form carboxylate or carboxylic acid groups at the surface. Surface modification was monitored by following changes in contact angle. The hydrophobic/hydrophilic interactions of carboxylated PMPP surfaces allow for mesoscale interactions of thin polymer films.

Sign in / Sign up

Export Citation Format

Share Document