Scanned-Probe Microscopy of Elastomer Blends: Morphology and Mechanical Properties

1998 ◽  
Vol 4 (S2) ◽  
pp. 824-825
Author(s):  
Michael P. Mallamaci
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Phase Measurement ◽  
Phase Morphology ◽  
Probe Microscopy ◽  
Transmission Electron ◽  
Scanned Probe Microscopy ◽  
Filler Distribution ◽  
Morphology And Mechanical Properties ◽  
Section Production

Scanned-probe microscopy (SPM) has found application to a variety of polymer systems, primarily for the examination of surface morphology and the assessment of surface properties. In fact, SPM is unique in its ability to probe both phase morphology and mechanical properties simultaneously. The examination of industrial elastomers and their blends by SPM techniques can provide morphological information historically obtained only by transmission-electron microscopy (TEM). Since contrast with the SPM can be generated by differences in mechanical response of the constituent phases, polymer blends which are difficult to etch or stain for TEM can be successfully examined. In many cases measurements of polymer morphology can be made more easily with SPM, since time-consuming steps associated with thin-section production and staining are not required. Contact and tapping-mode operation along with force modulation and phase measurement can be used to examine phase microstructure, phase morphology, filler type, filler distribution, and viscoelastic response in elastomer systems.

scholarly journals Preparation and Properties of Viscose Rayon/O-carboxymethyl Chitosan Antibacterial Fibers

2011 ◽  
Vol 6 (3) ◽  
pp. 155892501100600 ◽  
Author(s):  
Youbo Di ◽  
Guoqiang Long ◽  
Huiqin Zhang ◽  
Qingshan Li
Keyword(s):  
Mechanical Properties ◽  
Viscose Rayon ◽  
Moisture Absorption ◽  
Cellulose Xanthate ◽  
Carboxymethyl Chitosan ◽  
Infrared Scanning ◽  
Transmission Electron ◽  
Structure Morphology ◽  
Viscose Process ◽  
Morphology And Mechanical Properties

Antimicrobial viscose rayon/O-carboxymethyl chitosan fibers (VCMFs) were manufactured by spinning the mixture of O-carboxymethyl chitosan (O-CMCS) xanthate and cellulose xanthate via the viscose process. The structure, morphology and mechanical properties were investigated by infrared, scanning electron microscopy, transmission electron microscope and tensile test. The results show that the blend fibers of cellulose and O-CMCS were satisfactorily prepared and the two polymers were mixed homogeneously. VCMFs display striation along the fiber similar to those of viscose rayon fibers, and their mechanical properties are close to that of viscose rayon. With O-CMCS blended, VCMFs showed good moisture absorption and antibacterial activity against E.coli.

Characterization of Structure and Mechanical Properties of MoSi2-SiC Nanolayer Composites

1993 ◽  
Vol 322 ◽  
Author(s):  
H. Kung ◽  
T. R. Jervis ◽  
J-P. Hirvonen ◽  
M. Nastasi ◽  
T. E. Mitchell
Keyword(s):  
Mechanical Properties ◽  
Structural Changes ◽  
Crystallization Process ◽  
Mechanical Response ◽  
Cross Sectional ◽  
Annealing Conditions ◽  
Transmission Electron ◽  
Layer Structures ◽  
Amorphous Structures

AbstractA systematic study of the structure-mechanical properties relationship is reported for MoSi2-SiC nanolayer composites. Alternating layers of MoSi2 and SiC were synthesized by DCmagnetron and if-diode sputtering, respectively. Cross-sectional transmission electron microscopy was used to examine three distinct reactions in the specimens when exposed to different annealing conditions: crystallization and phase transformation of MoSi2, crystallization of SiC, and spheroidization of the layer structures. Nanoindentation was employed to characterize the mechanical response as a function of the structural changes. As-sputtered material exhibits amorphous structures in both types of layers and has a hardness of 11GPa and a modulus of 217GPa. Subsequent heat treatment induces crystallization of MoSi2 to form the C40 structure at 500°C and SiC to form the a structure at 700°C. The crystallization process is directly responsible for the hardness and modulus increase in the multilayers. A hardness of 24GPa and a modulus of 340GPa can be achieved through crystallizing both MoSi2 and SiC layers. Annealing at 900°C for 2h causes the transformation of MoSi2 into the Cllb structure, as well as spheroidization of the layering to form a nanocrystalline equiaxed microstructure. A slight degradation in hardness but not in modulus is observed accompanying the layer break-down.

Phase Morphology and Mechanical Properties of Ethylene-Propylene-Diene-Monomer/Fluoroelastomer Blends

Polymer Korea ◽  
2015 ◽  
Vol 39 (5) ◽  
pp. 754 ◽  
Author(s):  
Gi-Bbeum Lee ◽  
Seung Gyeom Kim ◽  
Yong Hwan Yoo ◽  
Seok In Kang ◽  
Jong Gab Oh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Morphology ◽  
Ethylene Propylene Diene Monomer ◽  
Ethylene Propylene ◽  
Morphology And Mechanical Properties

Phase Morphology and Mechanical Properties of PTT/POE-g-MAH Blends

2011 ◽  
Vol 181-182 ◽  
pp. 160-163
Author(s):  
Ming Tao Run ◽  
Yu Zhong ◽  
Bing Tao Xing ◽  
Qing Han ◽  
Qing Chang Zhang
Keyword(s):  
Mechanical Properties ◽  
Charpy Impact ◽  
Nucleating Agent ◽  
Phase Morphology ◽  
Copolymer Blends ◽  
Dispersion State ◽  
Ethylene Copolymer ◽  
Impact Tester ◽  
The Impact ◽  
Morphology And Mechanical Properties

In this article, the phase morphology and mechanical properties of poly (trimethylene terephthalate)/maleinized poly (octene-ethylene) copolymer blends are studied by using scanning electron microscopy (SEM), polarized optical microscopy (POM), universal material tester and charpy impact tester. The results suggest that the crystal size of the blends decreases obviously and POE component is partly served as nucleating agent for the crystallization of PTT. PTT and POE have good compatibility in blends because the dispersed phase of POE has even dispersion in blends when POE content is lower than 5%; however, the dispersion state of POE becomes poor when POE content is larger than 5%. The impact strength increases to maximum when the POE content is about 4 %. The tensile strength gets to maximum when POE content is 1-2 %.

Sign in / Sign up

Export Citation Format

Share Document