Learning objectives
The course aims to give a basic understanding of polymeric materials. In particular, the objective is to develop knowledge on the use of plastic materials, how to choose the most suitable polymers for various applications, which precautions you should have when using polymers to replace metals and what are the criteria for redesigning components in consideration of the production technology of the pieces.
Prerequisites
To tackle the course it is advisable to have passed the following courses:
-Chemistry
-Applied Chemistry
-Building science
Course unit content
Italian
Full programme
Program of the course
Thermoplastic and thermosetting
Polymerization mode
repeating units
morphology
Degree of crystallinity
Advantages and Disadvantages of amorphous and semi-crystalline
Theoretical explanation of the different morphologies and the influence of some important parameters
PROPERTIES 'OF PLASTICS
rheological properties
mechanical Properties
thermal Properties
Glass Transition Temperature
Other thermal properties
electrical Properties
other properties
Using fillers to improve the properties
SOME EXAMPLES OF POLYMERS
POLYMER TESTING
dynamic modulus
tensile Properties
ISO 527
ASTM D638
flexural properties
Tensile Creep
Charpy impact strength (ISO 179)
Izod impact strength (ISO 180)
Change in properties after long exposure to high temperature (ISO 2578)
Standard dimensions of test specimens (ISO 3167)
TECHNOLOGIES FOR THE PROCESSING OF POLYMERIC MATERIALS
Injection Molding
Injection-compression strain
With low-pressure injection molding
Injection molding with two components
Co-injection
TSG technology
Injection with mechanical expansion
technology GIT
rotational molding
Slush molding
calendaring
extrusion
thermoforming
Blow molding
Properties of the polymers for the transformation
Low thermal conductivity
High viscosity of the fluid
Combined effect of low thermal conductivity and high viscosity in molten
Plastic extrusion
Geometrical characteristics of the vine
Injection Molding
PROTOTYPE
The purpose of a prototype
Types of prototype
Rapid prototyping technologies
Small series
DESIGNING WITH PLASTICS
Introduction to design
design features
dimensional changes
Influence of afterpressure
Bibliography
Notes available on line or at the teacher's. There are 2 book, part 1 and part 2.
Teaching methods
The course includes lectures
Lesson in university laboratory for tensile tests
meetings with some industry experts
Assessment methods and criteria
The examination will consist of:
-threshold of 30 quiz questions
-oral examination
Other information
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