Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
TEM and SEM in polymer blends
TEM and SEM in a ternary polymer blend
Isfahan University of Technology
Textile Engineering Department
Advanced Microscopy Seminar
Advanced Microscopy Seminar
TEM and SEM in a ternary polymer blend
Dr Mostafa youssefi
Dr Sedigheh Borhani
By MohammadAli Hassannia
January 2022
Melt Blending
Melt blending
1
Internal mixer or banbury
Internal mixer or banbury
Carrot, C., M. Akkoyun, and B. Blottiere, On the use of an internal mixer to study the impregnation of carbon fillers by organic liquids. Applied Rheology, 2014. 24(1): p. 1-8.
2
Extruder
Extruder
Verdier, N., et al., Challenges in Solvent-Free Methods for Manufacturing Electrodes and Electrolytes for Lithium-Based Batteries. Polymers, 2021. 13(3): p. 323
3
polypropylene / styrene ethylene butylene styrene /polycarbonate
PP / SEBS / PC
70% / 15% / 15%
SEM
4
Interfacial Tension
Interfacial Tension
Morphology prediction (Spreading coefficient and Relative interfacial energy)
Spreading Coefficient
Individual particle morphology
Relative interfacial energy
Individual particle morphology
Hobbs, S., M. Dekkers, and V. Watkins, Effect of interfacial forces on polymer blend morphologies. Polymer, 1988. 29(9): p. 1598-1602.
Guo, H., et al., Prediction and manipulation of the phase morphologies of multiphase polymer blends: 1. Ternary systems. Polymer, 1997. 38(4): p. 785-794.
5
SEM
PP / SEBS / PC
SEM
70% / 15% / 15%
6
Sample preparation
Sample preparation
Before SEM
1. all samples were fractured in liquid nitrogen.
2. Cyclohexane was used as a solvent to remove SEBS.
3. A thin gold film was deposited on the samples surface to make them conductive and then, the samples were subjected to SEM study.
7
PP / SEBS / PC / nanoclay
TEM
70% / 15% / 15% / 3phr
TEM
Cloisite 20A
Cloisite 30B
8
Thermodynamic
Interfacial Tension
9
Cloisite 20A and its nanocomposite
Cloisite 20A layer distance=2.45 nm
20A-3% layer distance=3.39 nm
10
Cloisite 30B and its nanocomposite
Cloisite 30B layer distance=1.83 nm
layer distance=3.51 nm
30B-3phr
layer distance=1.42 nm
11
Sample preparation
Sample preparation
Ultrathin sections (70-90 nm thick) were prepared from the injection molded plates using a Reichert ultracut ultramicrotome cooled at -100°C and equipped with a glass knife. The ultrathin sections were placed on carbon-coated copper grids. Carbon-coated copper specimen grids were stained with two different intensities (1 and 3 h) of staining by osmium tetroxide vapor. In law intensity of staining (1 h) the PC droplets were observed as a white phase, SBS and SEBS-g-MA droplets as the black ones. In high intensity of staining (3 h), the PC droplets and SBS and SEBS-g-MA phases were observed as light gray and black spots, respectively.
12
Thank you
Electrospinning
In this study, nanofibers with Poly(γ-glutamic acid) (γ-PGA) as the core and Polylactic acid (PLA) as the shell materials were prepared via coaxial electrospinning.
The microstructure and morphology of the core-shell nanofibers were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM)
Electrospinning
13
SEM
SEM
14
TEM
TEM
15