New elevated temperature mold compound adhesion test method using a dynamic mechanical analyzer

2006 ◽  
Vol 442 (1-2) ◽  
pp. 81-86 ◽  
Author(s):  
Andrew Schoenberg ◽  
Edmund Klinkerch
Keyword(s):  
Elevated Temperature ◽  
Test Method ◽  
Adhesion Test ◽  
Dynamic Mechanical Analyzer ◽  
Dynamic Mechanical

scholarly journals Effects of Flocks Doping on the Dynamic Mechanical Properties of Shear Thickening Gel

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yuhao Tan ◽  
Yuling Li ◽  
Yanxue Ma ◽  
Bingjun Rao
Keyword(s):  
Mechanical Properties ◽  
Shear Thickening ◽  
Dynamic Mechanical Properties ◽  
Continuous Phase ◽  
Test Method ◽  
Dynamic Mechanical Analyzer ◽  
Dynamic Mechanical ◽  
Random Arrangement ◽  
Regular Arrangement ◽  
Rheological Test

AbstractPolymethyl methacrylate (PMMA) was used as the dispersed phase and mold silicone was used as the continuous phase to prepare the shear thickening gel (STG) doped with a certain amount of flocks by rotary stirring. STG doped with flocks by a rotary rheometer was tested and observed through a scanning electron microscope. Results revealed that both the rotary stirring sample preparation and the rheological test method of the rotary rheometer could lead to the regular arrangement of flocks and could not reflect shear thickening performance accurately. The flocks showed a random arrangement in STG after the mixing process, and the dynamic mechanical properties were able to be measured with a dynamic mechanical analyzer (DMA). Flocks with a fineness of 3 Denier, 1 mm in length, and a mass ratio of 5% had significant effects on the dynamic mechanical properties of STG. Due to long continuous shearing time, flocks were arranged regularly when the sweeping frequency was higher than 125 Hz, then the shear thickening performance of the doped STG was declined.

scholarly journals Multiscale Characterization of E-Glass/Epoxy Composite Exposed to Extreme Environmental Conditions

2021 ◽  
Vol 5 (3) ◽  
pp. 80
Author(s):  
George Youssef ◽  
Scott Newacheck ◽  
Nha Uyen Huynh ◽  
Carlos Gamez
Keyword(s):  
Power Distribution ◽  
Epoxy Composite ◽  
Fire Retardant ◽  
Sandwich Composite ◽  
Dynamic Mechanical Analyzer ◽  
Fire Event ◽  
Balsa Wood ◽  
X Ray ◽  
Dynamic Mechanical ◽  
Composite Skins

Fiber-reinforced polymer matrix composites continue to attract scientific and industrial interest since they offer superior strength-, stiffness-, and toughness-to-weight ratios. The research herein characterizes two sets of E-Glass/Epoxy composite skins: stressed and unstressed. The stressed samples were previously installed in an underground power distribution vault and were exposed to fire while the unstressed composite skins were newly fabricated and never-deployed samples. The mechanical, morphological, and elemental composition of the samples were methodically studied using a dynamic mechanical analyzer, a scanning electron microscope (SEM), and an x-ray diffractometer, respectively. Sandwich composite panels consisting of E-glass/Epoxy skin and balsa wood core were originally received, and the balsa wood was removed before any further investigations. Skin-only specimens with dimensions of ~12.5 mm wide, ~70 mm long, and ~6 mm thick were tested in a Dynamic Mechanical Analyzer in a dual-cantilever beam configuration at 5 Hz and 10 Hz from room temperature to 210 °C. Micrographic analysis using the SEM indicated a slight change in morphology due to the fire event but confirmed the effectiveness of the fire-retardant agents in quickly suppressing the fire. Accompanying Fourier transform infrared and energy dispersive X-ray spectroscopy studies corroborated the mechanical and morphological results. Finally, X-ray diffraction showed that the fire event consumed the surface level fire-retardant and the structural attributes of the E-Glass/Epoxy remained mainly intact. The results suggest the panels can continue field deployment, even after short fire incident.

Scratch indentation, a simple adhesion test method for thin films on polymeric supports

1994 ◽  
Vol 8 (6) ◽  
pp. 635-650 ◽  
Author(s):  
George D. Vaughn ◽  
Bruce G. Frushour ◽  
William C. Dale
Keyword(s):  
Thin Films ◽  
Test Method ◽  
Adhesion Test ◽  
Polymeric Supports

Thermal characterization of carbon nanoparticle infused GFRP using dynamic mechanical analyzer

2019 ◽  
Vol 6 (10) ◽  
pp. 105317 ◽  
Author(s):  
R Karthicksundar ◽  
Balaji Rajendran ◽  
P K Dinesh Kumar ◽  
S Devaganesh
Keyword(s):  
Thermal Characterization ◽  
Dynamic Mechanical Analyzer ◽  
Carbon Nanoparticle ◽  
Dynamic Mechanical

Thermal Shrinkage Behavior of Battery Separator

2018 ◽  
Author(s):  
Shutian Yan ◽  
Jie Deng ◽  
Chulheung Bae ◽  
Xinran Xiao
Keyword(s):  
Thermal Expansion ◽  
Elevated Temperatures ◽  
Coefficient Of Thermal Expansion ◽  
Porous Membrane ◽  
Thermal Shrinkage ◽  
Dynamic Mechanical Analyzer ◽  
Free Standing ◽  
Dynamic Mechanical ◽  
Battery Separator ◽  
Shrinkage Behavior

Battery separators are thin, porous membrane of 20∼30 microns thickness. Polymer separators display a significant amount of shrinkage at elevated temperatures. It is difficult to quantitatively characterize the large shrinkage behavior with a free standing separator sample. This paper examines the use of a dynamic mechanical analyzer under tensile mode in measuring the coefficient of thermal expansion (CTE) of three commonly used separators.

Sign in / Sign up

Export Citation Format

Share Document