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Polymer chemistry BSc. SEM VI.pptx
This document provides an introduction and classification of polymers. It begins with defining a polymer as a large molecule formed by linking small molecule monomers repeatedly. It then classifies polymers based on their structure as linear, branched, or cross-linked. Polymers are also classified based on their source as natural, synthetic, or semi-synthetic. Further classifications are based on molecular forces and mode of polymerization. Examples are provided for different types of polymers.
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Polymer chemistry BSc. SEM VI.pptx
- 1. SHRI. GOVINDRAO MUNGHATECOLLEGE, KURKHEDA Class- B.sc – III (SEM-VI) Paper- IV Topic- POLYMER CHEMISTRY Welcome To Dr.Ganesh Online e-Classroom
- 2. INTRODUCTION A word polymeris a combination of two Greek words, poly means many and meros means parts or unit. A polymers is a large molecule of which is formed by repeated linking of the small molecules called “monomers”. More monomer molecules joined in units of long polymer. n(CH2=CH2) (-CH2-CH2-)n ETHYLENE POLYETHYLENE
- 4. Classification of Polymer ClassificationBased on Structure Classification Based on Source Classification Based on Molecular force Classification Based on Mode of Polymerization
- 5. 1. Classification Basedon Structure Linear polymers : These polymers consist of long and straight chains. E.g.: Polyvinyl chloride, polythene etc.
- 6. 2. Branched Chainpolymers: These polymers contain linear chains having some branches
- 7. 3. Cross linkedpolymers (Network polymers): These are usually formed from bi-functional or tri-functional monomers and contain strong covalent bonds between various polymers. E.g: Melamine, Bakelite ,
- 9. Classification Based onSource • Natural Polymer- These are obtained from Plants and Animals Exa- Proteins, Cellulose, Starch
- 10. 2. Synthetic Polymer-These are man made polymer Exa- Polythene, Nylon etc
- 11. 3. Semi-synthetics Polymer-Obtained by modification natural polymer by artificial means. Exa- Cellulose Acetate, Cellulose nitrate
- 12. Classification Based onMolecular Force
- 13. Classification based onMode of Polymerization
- 14. MCQ 1. A largemolecule that consist of many repeating unit called as- A) Monomer B) Polymer C) Polypeptide D) Polyethylene 2. What does ‘poly’ means in Greek word? A) Molecule B) Hundred C) Chain D) Many 3. What are monomers? A) Atom B) Gaseous C) Small Molecule D) Compound 4. What do monomers form? A) Sugar B) Compound C) Alkane D) Long chain
- 15. 5. What ispolymer? A) Atom B) Molecule C) Compound D) Mixture 6. Which of the following is not a condensation polymer? A) Neoprene B) Dacron C) Glyptol D) Melamine 7. The weakest inter-particle force are present in A) Thermoplastic polymer B) Thermosetting polymer C) Fibre D) Elastomer 8. The polymer which are prepared in laboratories are called as A) Copolymer B) Addition polymer C) Homopolymer D) Synthetics polymer
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