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Scheda Riassuntiva
Anno Accademico 2019/2020
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 054187 - PRINCIPLES OF POLYMER CHEMISTRY
Docente Turri Stefano Ettore Romano
Cfu 5.00 Tipo insegnamento Monodisciplinare
Didattica innovativa L'insegnamento prevede  1.0  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 (1 liv.)(ord. 270) - MI (347) INGEGNERIA CHIMICA*AZZZZ054187 - PRINCIPLES OF POLYMER CHEMISTRY
Ing Ind - Inf (Mag.)(ord. 270) - MI (471) BIOMEDICAL ENGINEERING - INGEGNERIA BIOMEDICA*AZZZZ054187 - PRINCIPLES OF POLYMER CHEMISTRY
Ing Ind - Inf (Mag.)(ord. 270) - MI (472) CHEMICAL ENGINEERING - INGEGNERIA CHIMICA*AZZZZ054187 - PRINCIPLES OF POLYMER CHEMISTRY
Ing Ind - Inf (Mag.)(ord. 270) - MI (491) MATERIALS ENGINEERING AND NANOTECHNOLOGY - INGEGNERIA DEI MATERIALI E DELLE NANOTECNOLOGIE*AZZZZ054187 - PRINCIPLES OF POLYMER CHEMISTRY

Obiettivi dell'insegnamento

The first objective of the course is the description and classification of the main classes of monomers and polymerization processes of industrial interest.

A second objective of the course is a quantitative description of the general principles of polymerization, including a detailed statistical and kinetic analysis of the mechanisms of polymer chain formation, growth and gelation, vulcanization and crosslinking.

The third objective is the thermodynamic interpretation and the derivation of molecular theory for the entropic elasticity of rubbers, highlighting the limitations of the model by comparison with the real elastomer behaviour. 


Risultati di apprendimento attesi

After attending the course and after the final examination, the student will: 

  • know the main types of available industrial monomers and polymers, and understand how to classify them according to their structure
  • know and understand the kinetics and statistics of chain formation and growth in both step and chain polymerization processes
  • know and understand how to control composition and sequence in copolymerization
  • know and understand the mechanism of network formation in polyfunctional polymerization processes
  • know and understand the role of catalysis in polymerization
  • know the features of homogeneous and heterogeneous polymerization processes, with application to the most relevant industrial cases
  • know and understand the molecular basis of the entropic elasticity model 
  • know the main chemical technologies for rubber vulcanization, and the behaviour of real elastomers
  • be able to apply the above described knowledge to the quantitative control of process variables in polymerization, solving numerical problems aimed at the control of rate of reaction, conversion, and molecular weight 
  • be able to apply the above described knowledge to the prediction of the gel point / gel time in polyfunctionl process
  • be able to apply the entropic elasticity model to the modeling of the mechanical behavior of elastomers

 These learning outcomes are expected to provide the student with the needed knowledge tools necessary for successfully performing their future activities in an industrial environment, with particular reference to the polymer industry

 

 

 


Argomenti trattati

The course is divided in two parts, with the following programme

Part 1: Polymerization

Classification of monomers and polyreactions, correlation with polymer microstructure.

Step polyreactions, kinetic and thermodynamic aspects of polycondensations, most probable distribution of molecular weights, control of polymerization.

Chain polyreactions, phases of free-radical poyadditions, kinetic and thermodynamic aspects of free radical polyadditions, distribution of molecular weights, chain transfer and control of molecular weight, effect of temperature. Some hints on controlled radical polymerizations.

Chain polyreactions, ionic processes, phases of cationic and anionic polymerizations, living anionic polymerizations and block copolymers. Ziegler-Natta catalysis and stereospecific polymerization. Control of the polymer microstructure.

Copolymerization, derivation of the kinetic model, reactivity ratios and Lewis-Mayo equation, F1-f1 diagrams, Alfrey-Price parameters, yield and control of compositional drift in copolymerization. Determination of composition in copolymers.

Crosslinking ad thermoset polymers. Carothers and Flory's statistical models for the estimation of the gel point in crosslinking processes. Experimental monitoring of the gel time.

Industrial production of polymers: batch and continuous processes, homogeneous and heterogeneous processes. Bulk polymerization, suspension polymerization, emulsion polymerization. Production of PET, PA6, PVC, SBR.

 

Part 2: Rubber science and technology

Structural requirements of elastomeric materials, correlation with intra and intermolecular parameters. Definition of entropic elasticity.

Classical thermodynamics of rubber elasticity, derivation of the equation of state of elasticity at constant pressure and constant volume; thermoelastic inversion (flipped classroom).

Molecular (statistical) theory of rubber elasticity; gaussian chain and elastic retraction force, Kuhn model and ideal rubber, affine deformation and derivation of the constitutive law for ideal rubber (flipped classroom).

Behavior of real elastomers; hysteresis and dissipation, strain-induced crystallization of stereoregular rubbers, Mooney-Rivlin plot.

Vulcanization of rubbers; sulfur, peroxy and ionic vulcanization processes. Process monitoring by rheological and thermal methods. Isothermal kinetic modelling of rubber vulcanization.

Mechanical reinforcement of real elastomers; reinforcing fillers, small deformation behavior and Payne effect; large deformation behavior.

 

 

 

 

 


Prerequisiti

A background in mathematics, chemistry, physics and materials science is needed


Modalità di valutazione

The examination will be a written test about all the course topics, chosen by the examiner. The test will consist in 5 or 6 questions, typically some 2-3 questions concerning theoretical aspects, derivation of mathematical models, graphical representation of data and physical interpretation of results, and 2-3 questions in form of numerical problems to be solved.

The student is required to be able to write clearly and critically discuss the proposed topics, highlighting hypotheses, assumptions, critical points, the physical meaning and its consequences, including a correct mathematical approach where needed.

 


Bibliografia
Risorsa bibliografica obbligatoriaS. Turri, Principles of Polymer Chemistry - lecture's notes
Risorsa bibliografica facoltativaG. Odian, Principles of Polymerization, Editore: Wiley, Anno edizione: 2004
Risorsa bibliografica facoltativaJ.E. Mark, Rubber Science and Technology, Editore: Elsevier, Anno edizione: 2013

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
30:00
45:00
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 50:00 75:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.5 / 1.6.5
Area Servizi ICT
20/10/2020