Lecture 1 (Chemistry of Polymers molecules).pptx

polymers

1. Chemistry of Polymers Lecture 1 Dr. Marwa Abdeen

2. Course Title Chemistry of Polymers Course Code CHE 212 Semester Second term Academic Year 2024-2025 Course Hours Lec Tut Lab   2 --- ---   Grades Distribution Quizzes Mid-term Final Experimental Total   20 20 60 ------------ 100   Course Staff Dr. Marwa Maher Abdeen

3. Course Objectives Understand the Fundamental Concepts of Polymers Describe the structure, properties, and classifications of polymers. Differentiate between thermoplastics, thermosets, and elastomers. Explain Polymerization Processes Understand various polymerization techniques, such as addition and condensation polymerization. Analyze the kinetics and mechanisms of polymerization reactions. Study Polymer Properties Relate polymer properties to their molecular structure, crystallinity, and thermal behavior . Analyze mechanical, electrical, and optical properties of polymers. Explore Polymer Applications in Industries

4. Reference Textbook: Charles E. Carraher Jr., Carraher's Polymer Chemistry, CRC Press, 8th.Ed., 2010 . References: Malcolm P. Stevens, Polymer Chemistry: An Introduction, Oxford University Press, 3rd. Ed.,1998. Charles E. Carraher Jr., Introduction to Polymer Chemistry, CRC Press, 1st. Ed., 2006

5. Contents  Page Chapter 1. Introduction 4 Chapter 2. Polymer Structure   8 Chapter 3. polymerization   28 Chapter 4. polymers types and additives   38 Chapter 5. PVC- polymer   56 Chapter 6. PP-Polymer   77 Chapter 7. Polypropylene   95 Chapter 8. Nylon 66   109

6. Introduction

7. Monomer ⚫ Monomer is the molecule that forms the basic unit for Polymer Polymers

8. Polymers Polymers are materials containing repeated chemical units ( mers - monomers ) joined together like beads on a string . Some polymer molecules contain hundreds or thousands of monomers and are often called macromolecules . Organic compounds that are chemically based on carbon, hydrogen, and other nonmetallic elements (viz. O, N, and Si). Furthermore, they have very large molecular structures, often chain-like in nature that has a backbone of carbon atoms. Polymers consist of molecules that have covalent bonding within each molecule and van der Waals forces between them.

9. Based on their origin they are classified to natural polymers such as cotton, natural rubber, leather, and synthetic polymers such as polyethylene

10. Most polymers are organic in their origin and are formed from hydrocarbon molecules . Each carbon atom has four electrons that participate in covalent bonding , each hydrogen atom has one bonding electron saturated hydrocarbons ( A single covalent bond exists) Examples are : Hydrocarbon molecules

11. Unsaturated hydrocarbons Double and triple bonds can exist between C atoms ( sharing with two or three electron pairs ) . Unsaturated molecules are more reactive :

12. Any Questions