The Chemistry of Coatings. Scientific Inquiry Project
The Chemistry of Coatings
Scientific Inquiry Project
Scientific Method
Steps of the Scientific Method
1.
Purpose
2.
Research
3.
Hypothesis
4.
Experimental Design
5.
Analyze Results
6.
Conclusion
What makes a Good Procedure?
1.
Testable Hypothesis
2.
Quantitative Measurements (SI units)
3.
Controls
4.
Variables
5.
Trials
6.
Data Table/Charts
Engineering Design
Steps of the Engineering Design
1.
Define the problem
2.
Research
3.
Specify Requirements
4.
Develop and Prototype Solution
5.
Test Solution
6.
Communicate Results
The Chemistry of Coatings
Polymers and Coatings
What is a Polymer
Polymer:
a substance that has a molecular structure consisting chiefly or entirely
of a large number of similar units bonded together, e.g., many synthetic organic
materials used as plastics and resins.
Examples of Polymers
1.
Kevlar
2.
Polysaccharides
3.
Nucleic Acids
4.
Polyester
5.
Polyethylene
6.
Epoxies
What is an epoxy?
Epoxy
A flexible usually thermosetting resin made by polymerization
of an epoxide and used chiefly in coatings and adhesives.
Uses for Epoxy Resins
Paintings and Coatings
Adhesives
Industrial tooling
Electronics
Art Pigments
Jewelry
Flooring
Boating
Stoichiometry
Stoichiometry
-Stoichiometry is the process of using quantitative
relationships to determine the amount of material needed to
form a certain amount of product.
Stoichiometry
If I need to make enough sandwiches for the class, how many
slices of bread and cheese would I need?
Stoichiometry
Stoichiometry can help scientists calculate the amount of
reactants or products needed in order to get the desired
results for any reaction.
Stoichiometry and Epoxies
Most formulated products include mixtures of epoxy resins, diluents (reactive
and unreactive), fillers, additives,…. It is essential to determine the Epoxy
Equivalent Weight (E.E.W.) of the mixture to determine proper stoichiometric
ratios with the curing agent. This is accomplished with the following
equation:
Project Objective
Goal of Project
G
r
o
u
p
1
:
S
c
i
e
n
t
i
f
i
c
M
e
t
h
o
d
You’re goal is to use the scientific method and
create an experiment to determine the ideal ratio
of epoxy and resin that has the most strength.
B
o
t
h
G
r
o
u
p
s
:
The final structure will be tested with a three
point flexural test and the amount of deviation of
the line.
G
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o
u
p
2
:
E
n
g
i
n
e
e
r
i
n
g
D
e
s
i
g
n
Constraints:
1.
You must not use more than 10 mL total of
part A and part B
2.
Part A costs $0.10/1mL and Part B costs
$1.00/1mL.
3.
In order to have a successful structure it
must fall less than 15% of the original
beam height.
Appendix:
Chemistry of Epoxy
Epoxy and Amine Structure
Epoxide Formation
Epoxy=Di-functional Amine= Hexa-functional
We can manipulate the thermosets properties by varying the
ratio of epoxy to amine.
Application of Epoxies to Bonding
Stoichiometry and Epoxies
Most formulated products include mixtures of epoxy resins, diluents (reactive
and unreactive), fillers, additives,…. It is essential to determine the Epoxy
Equivalent Weight (E.E.W.) of the mixture to determine proper stoichiometric
ratios with the curing agent. This is accomplished with the following
equation:
(Can have students calculate this if you would like!!)
Delve into the world of coatings and polymers through scientific inquiry projects, understanding the steps of the scientific method and engineering design. Learn about polymers, epoxies, and their various applications in coatings, adhesives, industrial tooling, electronics, and more.
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Presentation Transcript
The Chemistry of Coatings Scientific Inquiry Project
Steps of the Scientific Method 1. Purpose 2. Research 3. Hypothesis 4. Experimental Design 5. Analyze Results 6. Conclusion
What makes a Good Procedure? 1.Testable Hypothesis 2.Quantitative Measurements (SI units) 3.Controls 4.Variables 5.Trials 6.Data Table/Charts
Steps of the Engineering Design 1. Define the problem 2. Research 3. Specify Requirements 4. Develop and Prototype Solution 5. Test Solution 6. Communicate Results
What is a Polymer Polymer: a substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together, e.g., many synthetic organic materials used as plastics and resins.
Examples of Polymers 1.Kevlar 2.Polysaccharides 3.Nucleic Acids 4.Polyester 5.Polyethylene 6.Epoxies
What is an epoxy? Epoxy A flexible usually thermosetting resin made by polymerization of an epoxide and used chiefly in coatings and adhesives.
Uses for Epoxy Resins Paintings and Coatings Adhesives Industrial tooling Electronics Art Pigments Jewelry Flooring Boating
Stoichiometry -Stoichiometry is the process of using quantitative relationships to determine the amount of material needed to form a certain amount of product.
Stoichiometry If I need to make enough sandwiches for the class, how many slices of bread and cheese would I need?
Stoichiometry Stoichiometry can help scientists calculate the amount of reactants or products needed in order to get the desired results for any reaction.
Stoichiometry and Epoxies Most formulated products include mixtures of epoxy resins, diluents (reactive and unreactive), fillers, additives, . It is essential to determine the Epoxy Equivalent Weight (E.E.W.) of the mixture to determine proper stoichiometric ratios with the curing agent. This is accomplished with the following equation:
Goal of Project Group 1: Scientific Method Group 2: Engineering Design Constraints: You re goal is to use the scientific method and create an experiment to determine the ideal ratio of epoxy and resin that has the most strength. 1. You must not use more than 10 mL total of part A and part B 2. Part A costs $0.10/1mL and Part B costs $1.00/1mL. 3. In order to have a successful structure it must fall less than 15% of the original beam height. Both Groups: The final structure will be tested with a three point flexural test and the amount of deviation of the line.
Appendix: Chemistry of Epoxy
Epoxide Formation Epoxy=Di-functional Amine= Hexa-functional We can manipulate the thermosets properties by varying the ratio of epoxy to amine.
Stoichiometry and Epoxies Most formulated products include mixtures of epoxy resins, diluents (reactive and unreactive), fillers, additives, . It is essential to determine the Epoxy Equivalent Weight (E.E.W.) of the mixture to determine proper stoichiometric ratios with the curing agent. This is accomplished with the following equation: (Can have students calculate this if you would like!!)
