logo-polimi
Loading...
Risorse bibliografiche
Risorsa bibliografica obbligatoria
Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2018/2019
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 052517 - MECHANICAL BEHAVIOUR AND DURABILITY OF POLYMERS
Docente Frassine Roberto
Cfu 10.00 Tipo insegnamento Corso Integrato
Didattica innovativa L'insegnamento prevede  2.0  CFU erogati con Didattica Innovativa come segue:
  • Blended Learning & Flipped Classroom

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - MI (491) MATERIALS ENGINEERING AND NANOTECHNOLOGY - INGEGNERIA DEI MATERIALI E DELLE NANOTECNOLOGIE*AZZZZ053368 - POLYMERS AND COMPOSITES FAILURE AND DURABILITY
052517 - MECHANICAL BEHAVIOUR AND DURABILITY OF POLYMERS
096275 - MECHANICAL BEHAVIOUR AND DURABILITY OF POLYMERS
053369 - VISCOELASTIC BEHAVIOUR OF POLYMERS

Obiettivi dell'insegnamento

The course aims to introduce basic and advanced concepts necessary for understanding the structure-property correlations of polymeric materials and composites for engineering applications. The analysis is carried out starting from the linear behavior (liquid and solid state) and time dependent (viscoelasticity) and then passing to the durability examination intended as the beginning of irreversible phenomena that lead to the degradation of the structure and performance of materials. They include the yield, fracture and phenomena of change of the chemical structure (eg degradation by exposure to sunlight) and physics of materials.


Risultati di apprendimento attesi

The student:
- knows and understands the structure-property correlations of polymers and composites and their appropriate use in the design of processes and products for Materials Engineering and Nanotechnologies;
- knows how to make choices related to the dimensioning of components and the use of materials in relation to the specific use of the product;
- autonomously carries out insights on topics related to the course to solve simple design problems.


Argomenti trattati

INTRODUCTION
The engineering use of polymeric materials: processing and applications.
Rheological properties and solid state properties.
Limitations of the traditional concept of property (‘single point data’) and advanced (‘integral’) concept.
Constitutive relations and their role in engineering problems.
Intrinsic material properties
Examples of constitutive relations used in polymer rheology and mechanics.

RECALL of basic concepts and definitions in SOLID and FLUID MECHANICS

POLYMER RHEOLOGY
Rheological constitutive equations for polymers: classification. Non-Newtonian shear behaviour of polymeric fluids. Dynamic viscosity. Fluodynamics and the role of rheological costitutive equations in fluodynamical problems. Example: analysis of the flow in a pipe.

PROPERTY-to-STRUCTURE RELATIONSHIPS in POLYMER RHEOLOGY
Shear viscosity-to-structure relationships in polymers. Shear viscosity dependence on temperature and pressure.

POLYMER VISCOELASTICITY
Material's fading memory: ‘functional’ dependence of material's response on stimulus' past history. Behaviour of polymers under ‘simple’ histories of the mechanical stimulus: Energetical consequences of the viscoelastic behaviour.
The theory of linear viscoelasticity. I. Boltzmann’s superposition postulate. The theory of linear viscoelasticity. II. Analogue models.

THERMO- and PIEZO-VISCOELASTICITY
General temperature dependence of viscoelasticity. Linear theory of thermo-viscoelasticity: time-temperature ‘equivalence’. Master curves and shift factor. Arrhenius’ and Williams-Landel-Ferry’s shift factors.Piezo-viscoelasticity: time-pressure ‘equivalence’.

PROPERTY-to-STRUCTURE RELATIONSHIPS in POLYMER VISCOELASTICITY
Thermo-mechanical Spectrometry (time/rate/frequency or temperature scans)

VOLUMETRIC BEHAVIOUR OF POLYMERS
Equation of state (PVT) and deviation from equilibrium: time-dependence of volumetric transformations. Kinetical nature of the glass transition. Doolittle’s experiment and the the concept of ‘free volume’. Derivation of WLF’s shift factor from Doolittle’s equation. Volumetric or ‘dilatational’ viscoelasticity (PVT-t). Effect of ‘dilatational’ viscoelasticity on ‘distorsional’ viscoelasticity.- POLYMER AND COMPOSITES AGEING AND DEGRADATION: chemical and physical mechanisms and their consequences on structure and properties


YIELD AND FRACTURE OF POLYMERS AND COMPOSITES: mechanisms, theories and effects of time-dependent behaviour

PREDICTION OF LIFETIME: accelerated testing, theoretical modeling and case histories

PREVENTIVE MEASURES: additives, coatings, etc.


Prerequisiti

Basic knowledge of chemistry, physics and analysis

Knowledge of mechanics of materials


Modalità di valutazione

The evaluation of the student is based on the following methods:

- participation in blended learning activities and learning verification tests

- final written test consisting of both open-ended questions and the resolution of design problems

The final mark is established on the basis of passing the written test, while the assessment of the learning tests constitutes an increase of that grade in the range from 0 to +2.


Bibliografia
Risorsa bibliografica obbligatoriaCourse notes and other reading material https://beep.metid.polimi.it
Risorsa bibliografica facoltativaH.A.Barnes, Handbook of Elementary Rheology, Editore: Wales Univ. Press, Anno edizione: 2000, ISBN: 0-9538032-0-1
Risorsa bibliografica facoltativaS.Middleman, The Flow of High Polymers, Editore: Interscience, Anno edizione: 1968
Risorsa bibliografica facoltativaD.J.William, Polymer Science and Engineering, Editore: Prentice-Hall, Anno edizione: 1971
Risorsa bibliografica facoltativaN.G. McCrum, C.P. Buckley and C.B. Bucknall, Principles of Polymer Engineering, Editore: Oxford Univ Press, Anno edizione: 1997
Risorsa bibliografica facoltativaH.F.Brinson and L.C.Brinson, Polymer Engineering Science and Viscoelasticity. An Introduction, Editore: Springer, Anno edizione: 2008
Risorsa bibliografica facoltativaC.W.Macosko, Rheology. Principles, Measurements and Applications, Editore: N.Y. VCH Publ., Anno edizione: 1994
Risorsa bibliografica facoltativaJ.D. Ferry, Viscoelastic Properties of Polymers (2nd Edition), Editore: John Wiley & Sons, Anno edizione: 1969

Software utilizzato
Nessun software richiesto

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
80:00
120:00
Esercitazione
20:00
30:00
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 100:00 150:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
schedaincarico v. 1.6.8 / 1.6.8
Area Servizi ICT
22/09/2021