|
|
|
|
|
|
Generate your Abstract and line of thought
using the following keywords:
Thermosets: (phenol formaldehyde) ; manufacturing processes: compression
molding; Characterization: thermal, mechanical, physicochemical
Discuss the following topics in correct language
and organized flow of ideas within your introduction:
1. Definition and general properties of thermosetting plastics.
2. Differences between thermoplastics and thermosetting plastics (brief
comparison): thermal response and formation.
3. Structure-property relationship of thermosets.
4. Manufacturing processes of thermosetting plastics.
5. Types of raw materials used in thermosets manufacturing (define:
pre-polymer).
6. Thermosets families.
7. Typical applications of thermosets.
The introduction should be followed with "Material"
section, containing the following properties:
-Chemical Name, Trade Name, Wt. % of U.S. Plastic Sales(*), Bulk List
Price $/Ib (*), Type of Plastic, Density, Tensile Strength, Young's Modulus
(E), Impact Strength: Izod, Elongation % , Hardness, Dielectric Strength,
Max. Service Temperature (no load)
(Properties marked with (*) are not necessary).
-Repeated unit
-General properties of the polymer: advantages and limitations
-Typical applications
The section has to include a complete description of the process used
(compression molding) , explaining the following:
1. Raw material forms.
2. Process parameters.
3. Advantages and limitations.
4. Detailed procedures for the experiment you carried out, with exact
weights used.
1. Mechanical Testing: tension and compression tests, and impact test
to measure the impact strength (toughness).
2. Flammability Testing: Molten material form, flame color, burning
fashion, smoke
3. Physical Testing: dimensions, density and physical shape
4. Chemical Testing: effect of chemical attack by different chemicals,
depicting changes in weight when immersed in:
-Strong alkali (NaOH)
-Weak acid (HCl (dilute))
-Strong acid (HCl (conc))
-With Water
Discuss the agreement or disagreement of the
experimental results with the tabulated data for the used polymers, and
those obtained in the experiment.
1. Explain the pressure variation during the curing process of the
pre-polymer powder.
2. General comments about the compression molding
--The following sites and books contain useful information and images for several articles that we have encountered in this experiment. Make sure to check them.
Kalpakjian, Serope. Manufacturing Process for Engineering Materials. Addison Wesley, 3rd Ed., 1997.
Smith, William F. . Principles of Materials Science and Engineering. McGraw Hill, 3rd Ed., 1996.