Physical Polymer B Pourabbas Faculty of Polymer Eng

Physical Polymer B. Pourabbas Faculty of Polymer Eng. Sahand University of Tech. pourabas@sut. ac. ir 2/22/2021 1

What We Study? 1. Physical Aspects of the Chain Properties: • Such as: – Thermal Behavior: • Melting, • Tg, • Other transitions and so on. 2/22/2021 2

What We Study? – Solubility • The solvent-polymer interactions • The effect of conditions: temperature and pressure Chain structure and so on 2/22/2021 3

What We Study? – Surface and interface properties • Surface dynamics • Surface energies 2/22/2021 4

What We Study? – Mechanical Properties • • 2/22/2021 Rubber Elasticity Rubber-glass transitions Yielding Viscoelasticity 5

What We Study? 2. The basic concepts and features which the physical properties themselves depends on. • Chain Structure – Liner – Branched – Cross-linked – Co-polymer – Chain Configuration – Chemistry – Crystalinity 2/22/2021 6

What We Study? • The size of the chains – Statistically defined molecular weights – Width of polydispersity 2/22/2021 7

What We Study? 3. The methods for measurement of the properties: • Chemical Methods: – Elemental Analysis – Functional Group Analysis – Selective Degradation 2/22/2021 8

What We Study? • Physical Methods: – NMR – IR & Raman – UV-visible – XPS – XRD 2/22/2021 9

Where From We Study? 1. Introduction to PHYSICAL POLYMER SCIENCE; By: Sperling (pdf file is available) 2/22/2021 10

Where From We Study? 2. Introduction to Polymer Physics 2/22/2021 11

Where From We Study? 3. Polymer Physics 2/22/2021 12

Where From We Study? 4. Polymer Physics 2/22/2021 13

All the presentation files will be in your reach. 2/22/2021 14

Your Class Activities • • • Being in the class Homeworks Questions planed Projects and presentations Mid-Term exams (Several) Final Exam 2/22/2021 15

Anythingelse? 2/22/2021 16

Let’s Get Started 2/22/2021 17

Chain Configuration Ø Polymer chains have three basic properties 1. The Molecular Weight, 2. The conformation of the chain in the space, 3. The configuration of the chain (microstructures), 2/22/2021 18

Examples of Configurations and Conformations 1. Head to tail and head to head configuration 2. Trans-Gauche Conformation 2/22/2021 19

Chemical Methods of Determining Microstructures 2/22/2021 20

Physical Methods of Determining Polymer Chain Microstructure 2/22/2021 21

Stereo Chemistry of Repeating Chiral Center Units 1. Chiral Centers 2. Tacticity in Polymers isotactic 3. Optical Isomerism 4. Geometric Isomerism 5. Substitutional Isomerism syndiotactic atactic 2/22/2021 22

Meso And Racemic 2/22/2021 23

Common Types of Copolymers 1. 2. 3. 4. 5. Unspecified Copolymers Statistical Copolymers Random Copolymers Alternating Copolymers Periodic Copolymers 2/22/2021 24