University of Babylon
College of Materials Engineering
Polymer& Petrochemical Industries
Department
Undergraduate Studies
Fourth Class
Course Title:
Polymer Blend and Alloy
Text Book
Polymer Blends Handbook
L. A. Utracki , Kluwer Academic Publishers ,
2002
Lecturer:
Eng. Auda Jabbar Braihi Ms.C
2013-2014
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Do and Don't
♠ Turn up on time.
♠ If you come in after the lecture starts, come in quietly, sit
at the back.
♠ If you are more than 10 minutes late don’t come in.
♠ Do not talk in lectures unless I ask you something.
♠ Do not sign for your friends!
♠Turn off mobiles in silent mode.
Teaching and Evaluation Methods:
♠ Two hours lectures per week.
♠ The course language is English.
♠ Students are encouraged to participate in class discussion.
♠ Daily class preparation and attendance is a must and no
excuses will be accepted.
♠ Students are expected to take notes.
♠ Students are expected to solve homework problems.
♠ There will be weekly or biweekly Quizzes.
♠ No. of units: 4
Grading :
- 2 Tests at 15 degree each.
- Quizzes at 5 degree.
- Homework at 5 degree.
- Final Exam at 60 degree.
Good Luck
☺☺
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Syllabus
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1
Structure-Property Relationship of Polymers
Macromolecules show a wide range of properties which are quite
different from thoes of respective monomers. They may be:
Elastic or rigid ,Hard or Soft, Transparent or opaque , Have strength of
steel but can have very light weight, Soften on heating or can set to a hard
mass on cooling the melt.
These properties may vary from one type of polymer to another and
even among the same type.
The fundamental parameters which influence the Structure-Property
Relationship are: Molecular Mass, Polarity, Crystallinity, Molecular
Cohesion, Nature of polymeric chains, Stereochemistry of the molecules.
These properties like tensile strength, crystallinity, elasticity, resistance
to chemicals, and wear and tear depend mostly on the polymer structure.
Examples:
♦ Stronger attractive forces between chains = Stronger , less flexible
polymer.
♦ Chains able to slide past each other = flexible polymer.
♦ In straight chain and branched chain polymers the individual chains
are held together by weak intermolecular force of attraction.
♦ Strength increases with increase in chain length(in turn increase in
Mw.) as the long chains are entangled(anchored)better
♦ In cross-linked polymers, monomeric units are held together only by
means of covalent forces
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Table 1: Types of intermolecular forces
Type of force
Dispersion, or
Van der Waals
Dipole-Dipole
Relative
strength
Week
Medium
Hydrogen Bond
Strong
Electrostatic
Very strong
Low molecular
analog
Methane
Hexane
CH3Cl
CH3CO2 CH3
Polymer
H2O
CH3CONH2
CH3CO2Na
Cellulose,
Proteins
Ionomers
PE
PP
PVC
PMMA
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
3-The presence of H-bonds between the polymer
molecules increasing the Tg
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
4-The presence of plasticizer reduces the Tg
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
5- Molecular Weight:
6-Crystallinity
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Molecular weight:
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.
Lec-1: Structure-property Relationship of Polymer………………………….Eng. Auda Jabbar Ms. C.