Ultrasonic characterization of the complex Young's modulus of polymers produced with micro-stereolithography

2017 ◽  
Vol 142 (4) ◽  
pp. 2546-2546 ◽  
Author(s):  
Clinton B. Morris ◽  
John M. Cormack ◽  
Michael R. Haberman ◽  
Mark F. Hamilton ◽  
Carolyn C. Seepersad
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Ultrasonic Characterization ◽  
Complex Young’S Modulus

A UNIQUE APPROACH TO EXPERIMENTAL CHARACTERIZATION OF A THERMOSETTING POLYMER MATRIX FOR ICME FRAMEWORKS

2021 ◽  
Author(s):  
MICHAEL N. OLAYA ◽  
SAGAR PATIL ◽  
GREGORY M. ODEGARD ◽  
MARIANNA MAIARÙ
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Cure Kinetics ◽  
Image Correlation ◽  
Scanning Calorimetry ◽  
Mixing Ratios ◽  
Fitting Procedure ◽  
Amine Content

A novel approach for characterization of thermosetting epoxy resins as a function of the degree of cure is presented. Density, cure kinetics, tensile strength, and Young’s modulus are experimentally characterized across four mixing ratios of DGEBF/DETDA epoxy. Dynamic differential scanning calorimetry (DSC) is used to characterize parameters for a Prout-Thompkins kinetic model unique to each mixing ratio case through a data fitting procedure. Tensile strength and Young’s modulus are then characterized using stress-strain data extracted from quasi-static, uniaxial tension tests at room temperature. Strains are measured with the 2-D digital image correlation (DIC) optical strain measurement technique. Strength tends to increase as amine content use in the formulation increases. The converse trend is observed for Young’s modulus. Density measurements also reveal an inverse relationship with amine content.

Synthesis and characterization of a Ti‐Zr‐based alloy with ultra‐low Young’s modulus and excellent biocompatibility

2021 ◽  
Author(s):  
Kyong Min Kim ◽  
Yazan Al-Zain ◽  
Akiko Yamamoto ◽  
Amirah H. Daher ◽  
Ahmad T. Mansour ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Synthesis And Characterization

scholarly journals Simultaneous Characterization of Instantaneous Young’s Modulus and Specific Membrane Capacitance of Single Cells Using a Microfluidic System

Sensors ◽  
2015 ◽  
Vol 15 (2) ◽  
pp. 2763-2773 ◽  
Author(s):  
Yang Zhao ◽  
Deyong Chen ◽  
Yana Luo ◽  
Feng Chen ◽  
Xiaoting Zhao ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Single Cells ◽  
Microfluidic System ◽  
Membrane Capacitance ◽  
Specific Membrane

A Nanoindentation-Based Microbridge Testing Method for Mechanical Characterization of Thin Films for MEMS Applications

2005 ◽  
Author(s):  
Zhiqiang Cao ◽  
Tong-Yi Zhang ◽  
Xin Zhang
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Young’S Modulus ◽  
Microelectromechanical Systems ◽  
Mechanical Characterization ◽  
Young's Modulus ◽  
Chemical Vapor ◽  
Testing Method ◽  
Chemical Vapor Deposited

Plasma-enhanced chemical vapor deposited (PECVD) silane-based oxides (SiOx) have been widely used in both microelectronics and MEMS (MicroElectroMechanical Systems) to form electrical and/or mechanical components. In this paper, a novel nanoindentation-based microbridge testing method is developed to measure both the residual stresses and Young’s modulus of PECVD SiOx films on silicon wafers. Theoretically, we considered both the substrate deformation and residual stress in the thin film and derived a closed formula of deflection versus load. The formula fitted the experimental curves almost perfectly, from which the residual stresses and Young’s modulus of the film were determined. Experimentally, freestanding microbridges made of PECVD SiOx films were fabricated using the silicon undercut bulk micromachining technique. The results showed that the as-deposited PECVD SiOx films had a residual stress of −155±17 MPa and a Young’s modulus of 74.8±3.3 GPa.

scholarly journals Development and characterization of k-carrageenan platforms as periodontal intra-pocket films

2021 ◽  
Vol 18 (9) ◽  
pp. 1791-1798
Author(s):  
Ola Tarawneh ◽  
Ameen Rasheed Al-Ass ◽  
Rania Hamed ◽  
Suhair Sunoqrot ◽  
Lina Hasan ◽  
...  
Keyword(s):  
Drug Release ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Viable Count ◽  
Efficient Treatment ◽  
Thermal Analyser ◽  
Noticeable Reduction ◽  
Microbial Adherence

Purpose: To prepare emulsion-based Intrapocket polymeric films for the treatment of periodontitis. Method: Films were fabricated by dehydration of an emulsion containing k-carrageenan (KC) in aqueous phase and Compritol® 888 ATO (Compritol® ) or Dimodan® UJ (DU® ) or different ratios of both. The resulting films were characterized by mechanical texture analyser to determine Young’s modulus and tensile strength. Glass transition temperature (Tg) of the films was evaluated by dynamic mechanical and thermal analyser while surface morphology was evaluated using scanning electron microscope. In-vitro drug release was conducted in pre-warmed phosphate buffer. Bacterial adherence was assessed after 24 h. Results: Young’s modulus was highest for KC films to which no lipid was added (5.33 ± 0.38 GPa) and decreased following lipid incorporation. Tg was highest in KC films (106.25 ± 4.53 ° C) but decreased upon addition of lipids. The surface of KC was smooth but roughness increased with increasing Compritol® load. Drug release from KC films was complete (99.80 ± 8.43 %) after 2 h; however, upon adding lipid, the release was extended 8 h and was affected by lipid type and ratio. Microbiologic assay demonstrated noticeable reduction in viable count compared to control and was affected by lipid type and ratio. The film formulated from a combination of DU® and Compritol® in a ratio of 80:20 was strong, flexible and reduced microbial adherence. Moreover, it showed a smooth surface and extended release for over 8 h. Conclusion: Intra-pocket films were prepared by drying emulsion-based films. Resulted films were strong, flexible, prolonged drug release over 8 h and could lower bacterial growth. The prepared film may offer efficient treatment in periodontitis patients.

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