Characterization of Polymer Surfaces and Interfaces - Copy

Characterization of Polymer Surfaces and Interfaces

Presented byMallikarjunachari.G (AM12D005)

email: [email protected] of Applied Mechanics

Indian Institute of Technology, Madras

Chennai - 600036

Dt: 09/11/2012

CE 5950 Characterization of Construction Materials

mailto:[email protected]

Mallikarjunachari.G Date: 09/11/2012 2/25



Why Thin Films and Spin Coating ?

Results & Discussions

Literature Survey and CharacterizationMaterial Description, Technique Used

Outline of Presentation:




Applications Spin Coating

Methodology






Electronic ComponentsElectronic Displays Optical Coatings

Magnetic Films for data storage Optical data storage devices

Why Thin Films & Spin Coating ?

Applications

Characterization of Polymer Surfaces and InterfacesWhy Thin Films

and Spin Coating?

Literature Survey and

Characterization

Overview of Results

Material Description and Technique used



Based on material Thickness

Thick films t > 300 nm

Thin films 100 < t < 300 nm

Ultra thin films t < 100 nm

Single layer N=1

Thin film: size reduction of bulk material in one direction

Classification of Thin Films

Material 1Material 2

Material 3Material 4

substratesubstratePolymer

Multi layer N>1

t film

substrate


and Spin Coating?


Characterization

Overview of Results



Dispenser

Substrate

Polymer + Solvent


Spin 150Single substrate spin processorSchematic Representation of spin coating

Top viewIsometric view


and Spin Coating?


Characterization

Overview of Results





Characterising Material System

Macro scale Nano scale

Microelectronic thin films (early 1980s)Mechanical properties important: electromigrationQuestions: Is E a function of tf? Is sy a function of tf? Is n a function of tf?

Bulk PropertiesYoung’s Modulus E

Hardness (HB) surface interactions

Thin films, Micro structure

Force Boding

Bonding

Energy KJ/Mol

Ionic400-4000

Covalent

150-1100

Metallic

75-1000

Force Boding

BondingEnergy KJ/Mol

Ion -Dipole 4-600

H-bond 10-40

Dipole - Dipole

5-25

Ion - induced

3-15

Dipole –Induced

dipole

2-10

Dispersion or

vanderwaals

0.05-40

Why Thin Films and Spin Coating?


Characterization

Overview of Results



Material Analysis Methods:



Characterization of polymer films produced at high speed of spin coating

Author: Krunal Bhavsar Fina draft

Nanoindentation and adhesion of sol-gel-derived hard coatings on polyester

C.M. Chan, G.Z. Cao, a) H. Fong, and M. Sarikaya Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 T. Robinson and L. Nelson Korry Electronics, Co., Seattle, Washington 98109

Cement Paste –epoxy interactions Fatma Djouani a , Carole Connan a , Michel Delamar a , Mohamed M. Chehimi a, *, Karim Benzarti b, * a Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS), University Paris Diderot & CNRS (UMR 7086), 15 rue Jean de Baïf, 75013 Paris, France b Université Paris Est, Laboratoire Central des Ponts & Chaussées (LCPC), PCM, 58 Bld Lefebvre, 75015 Paris, France

FTIR

AFM

NANOINDENTATION



Characterization

Overview of Results










FTIR

AFM

NANOINDENTATION



Characterization

Overview of Results




Material Description:

Thin Films and Spin Coating


Characterization

Overview of Results

Material Description and

objective

Overview of

Results

Cement/Adhesive Interface

Diethylenetriamine (DETA):

DETA

Cement Paste

Ordinary Portland Cement

C3S (3CaO.SiO2)+ Water

Cement Paste –epoxy interactions




Characterization

Overview of Results


FTIR


Atom F O N Cl

Electronegativity

4.0 3.5 3 3

H(2.20)



Mechanism of Physical Adhesion and Spectroscopy: Importance of Dipole moments in Spectroscopy:

Diatomic Molecules:

Triatomic Molecules:

H-H, Br-Br, Cl-Cl

H-Cl, I-Cl, Carbon monoxide

Co2

H2O

http://www.succeedingwithscience.com/labmouse/chemistry_as/1903.php

MoleculeDegrees of freedom

Nonlinear 3n-6

Linear 3n-5



Characterization

Overview of Results



Zero Debye 1.67 Debye

n = number of atoms in molecule

Ref: Making Sense About Dipole Moments Tridib Tripathy* and B. R. D**

* Department of Chemistry, Midnapur College, Midnapur, Paschim Medinipur

**





Results and Discussions:



Characterization

Overview of Results










FTIR

AFM

NANOINDENTATION



Characterization

Overview of Results





S.No Material Molecular

weight

1 Hydroxyl Ethyl Cellulose (HEC)

72000

2 Hydroxyl Methyl Cellulose (HMC)

146000

3 Polyvinyl Alcohol (PVA) 186000

4 PMMA 996000

5 Poly methyl pyrrolidone(PVP) 10000

Material Description:

Substrate: Glass slide of 2cm x2cm

Coated water dissolved polymers

substratePolymer




Characterization

Overview of Results


AFM


Thickness t = 20nm to 515nm

Speed = 11000 rpm



Ref: Nanotribology and Nanomechanics Bhrat Bhushan


A schematic 3D description of an AFM

PropertyYoung's Modulus E(Gpa)

Diamond 900-1050

Si3N4 310

Si 130-188

W 350

Ir 530

Mechanics:

AFM cantilever force constant: 0.06 to 50 N/mAFM cantilever resonance frequency: 1 kHz to 1 MHz AFM cantilever length: 100 to 500 µmAFM cantilever width: 30 to 50 µmAFM cantilever thickness: 0.5 to 8 µm

Tip Material: Diamond, CNT, Quartz, Silicon oxide, Silicon NitrideShape: Pyramidal, Square, Rectangular, Circular

The principle of single-scratch tests



Characterization

Overview of Results



Micro Slip

Nanotribology: experimental facts and theoretical models G V Dedkov



Analysis of 1% HEC film using AFM

Topography of 1% HEC film Thickness of 1% HEC film obtained using one of the black spot on the film

AFM image showing thickness of the 1% HEC film.

3-Dimentional representation of 1% HEC film using AFM

Results and Discussion:



Characterization

Overview of Results





Contd,

Fig: Topography of 10% PVP film(a) Topography looking at 10µm × 10µm of 10% PVP

film(b) Topography looking at 80µm × 80µm of 10% PVP

film

Fig: Graphs showing thickness of 10% PVP film.Thickness was obtained using 3 different areas on the

scratched film.

Analysis of 10% PVP film using AFM



Characterization

Overview of Results



t= 510nm 520nmMean t = 513.33








FTIR

AFM

NANOINDENTATION



Characterization

Overview of Results





Characterising Material System

Macro Indentation

Nano Indentation

How Nano-indentation: (10-9)



Characterization

Overview of Results



10 mmLoad 50-300 N

D

Micro to nanoLoad <1N

D

H = P/[ (p D2-d2 )/4]Units of stress, butNot stress,Not a physical measureIndicates resistance toplastic deformation

Ref: Nanotribology and Nanomechanics Bhrat Bhushan



Mechanics and Limitations of Continuum Mechanics:



Characterization

Overview of Results



Ref: Handbook of Nanoindentation by A.C.Fischer - Cripps

Mechanics

Limitations:

• Hardness

5.24

1

2

1* phdh

dPE

25.24 ph

PH

• Elastic modulus034.1

On failure of Continuum Plasticity theories on small scales

Ref: On failure of continuum plasticity theories on small scalesV. Berdichevsky a,, D. Dimiduk b

Order of Length Scale: 10-16 to 10-8 m

Order of no of participating atoms :10-6 to 10-8

Multiscale Analysis:



Material Description:Substrate: Polyester

Coating Material: Silica based Hard Coatings

S.No.

Composition

1 SiO2

2 SiO2-5MPS

3 SiO2-33MPS

4 SiO2 – 17ZrO2

5 SiO2- 17TiO2



Characterization

Overview of Results



Possible Mechanism:






Characterization

Overview of Results


Results and Discussion:

TABLE I. A composition and properties of sol-gel-derived silica- based coatings on modified polyester

substrates. Neither UV irradia- tion nor low-temperature heating was applied.


THANK YOU

Characterization of Polymer Surfaces and Interfaces - Copy

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