Polymer Engineering

Instructor : Daesu Kim

Office: E8-10 #702

Polymer Engineering

Outline:

This lecture will cover

- fundamental knowledge and concepts on polymer engineering - solid state properties of polymers

- how physical properties of polymers are related to their physical and chemical structures - what methods are used to measure the physical properties of polymers

- fundamental polymer processing technologies - viscoelasticity of polymers and rubber elasticity

Objectives:

- To understand fundamentals on polymer engineering

- To understand physical properties of polymers and how to measure them - To understand fundamentals on polymer processing

- To understand viscoelasticity of polymers and rubber elasticity - To carry out a term project on polymer engineering

Textbook:

1. 주교재 : Polymer Science and Technology, 3rd ed., Joel R. Fried, Prentice Hall, 2014 (원서) 2. 부교재 : 고분자공학개론, 3판., Joel R. Fried, 자유아카데미, 2015 (번역본)

ref) 김성철 외, 고분자공학I, 희중당, 1994

Weekly schedule:

1st week: Introduction to Polymer Engineering, Amorphous State of Polymers 2nd week: Crystalline State of Polymers

3rd week: Crystalline State of Polymers, Thermal Transitions and Properties 4th week: Thermal Transitions and Properties

5th week: Thermal Transitions and Properties 6th week: Mechanical Properties

7th week: Mechanical Properties

8th week: Q&A for lecture contents of 1st-7th weeks & midterm exam.

9th week: Polymer Processing

10th week: Polymer Processing, Begin Term Project 11th week: Viscoelasticity

12th week : Viscoelasticity 13th week: Viscoelasticity

14th week: Viscoelasticity, Rubber Elasticity, Present Term Project 15th week: Q&A for lecture contents of 9th-14th weeks & final exam.

Grading: - Exams (65%) - Homework (15%)

How to lecture:

- Lectures will be given using PowerPoint presentation materials written in English - PDF and lecture video files will be available at KOCW or CBNU eCampus

- Lecture video files should be studied in advance before attending to the class because a flipped learning method is used

Useful information:

- Solve the example problems

- Solve the assigned chapter-end problems and turn in on the due date as homework!

- If a student commits cheating on exams the student may be punished by the university regulations

Carrying out a term project:

1. Choose a term project item (new business idea proposal) on polymer engineering yourself 2. Prepare a PPT material of about 3 pages long as a final report and submit it by email

to dskim@cbnu.ac.kr on the presentation day before 10 AM 3. Present the PPT material for about 3 minutes at the class

a. Thermo-Physical Properties of Polymers

 Volumetric Properties: density change with T, thermal expansion

 Calorimetric Properties: heat capacity

 Transition Temperatures: T

, T

 Cohesive Properties and Solubility: solubility parameter

 Interfacial Energy Properties: surface tension

 Properties of Very Dilute Solutions: intrinsic viscosity

Ch.4 Solid-State Properties

b. Properties of Polymers in Fields of Force

 Optical Properties: refractive index, transparency birefringence

 Electrical Properties: dielectric constant

 Magnetic Properties: magnetic resonance

 Mechanical Properties of Solid Polymers: modulus, strength

 Acoustic Properties: damping properties

c. Transport Properties of Polymers

 Rheological Properties of Polymer Melts: viscoelasticity

 Rheological Properties of Polymer Solutions: viscoelasticity

 Transport of Thermal Energy: thermal conductivity

 Properties Determining Mass Transfer: permeability

 Crystallization: crystallinity

d. Chemical Stability and Breakdown of Polymers

 Thermo-Chemical Properties: thermodynamics

 Thermal Decomposition Property: thermal stability

 Chemical Degradation Property: chemical stability

e. Polymer Properties as an Integral Concept

 Intrinsic Properties: structure(chemical & physical) dependent

 Processing Properties: orientation of polymer chains

 Product Properties (I): Mechanical Properties - failure mechanism

- deformation properties - toughness and endurance - hardness

- friction and wear

 Product Properties (II): Environmental Behavior - thermal end use properties

- flammability

- environmental decay of polymers in liquids

- environmental decay of polymers in the air

 commercial polyolefins: semi-crystalline polymers with spherulites

 polymer morphology:

a. amorphous polymer: atactic-PS, atactic-PMMA

b. crystalline polymer: stereoregularity, isotactic-, syndiotactic- mostly semi-crystalline polymer: amorphous region +

crystalline region

 polymer morphology physical properties

ex) PE (high crystallinity), PVC (low crystallinity)

f. Polymer Morphology