PPT-CHAPTER 9 REACTIONS OF POLYMERS

the synthesis of new polymers by modification of existing polymers using a variety of chemical reactions 1 the esterification of cellulose crosslinking of polyisoprene hydrolysis. These polymers bring a signi64257cant contribution to the sustainable development in view of the wider range of disposal options with minor environmental impact As a result the market of these environmentally friendly materials is in rapid expansion Formations and linkages. What are polymers?. Alkene. molecules have the ability to add onto one another and produce large molecules these are polymers. . Therefore what are monomers?. The process of these large molecules forming is termed addition polymerisation.. Polymers. . C.X.C objectives. Students should be able to :. Define polymers. Distinguish between addition and condensation as reactions in the formation of polymers. Name examples of polymers formed by:. AND . POLYMERIZATION. By. Dr Rashid Hassan. Assistant Professor. RIHS. ISLAMABAD. 1. POLYMER. Poly = Many mer = Units. I.e. a material made up of many units.. Properly defined as:. Chemical compound composed of large organic molecules formed by the union of many repeating small monomer units.. . Polymerization . can proceed according to two different mechanisms, referred to as chain-growth and step-growth polymerization. . S. tep. -growth polymerization. Step-growth polymers, also called condensation . Alkenes. The commercial . process. of . hydrogenation is . used. to . convert the double . bonds. in . vegetable oils to . saturated. fats . such as those in margarine. . Learning . Goal . . Draw the condensed or line-angle structural formulas and give the names for the organic products of addition reactions of alkenes. Draw a condensed structural formula for a section of a polymer.. Bellwork. : Please turn in your Meal Breakdown sheets and posters to table 7 marked with your class period. . On the sheet of paper you picked up:. Title: Quiz 2. Name. Period. Date. Number it 1-10. Science Fact of the Day:. Goal is to understand reaction mechanisms. Three types of reactions: . Substitution. Redox. Ligand-Based. Primarily substitution reactions. :. M. ost substitution reactions are rapid . but some are slow. Overview. What are . polymers. ?. How are polymers named?. What is a polymer . crosslinker. ?. Polymers are all around us!. Contact lenses. Sport equipment. Clothing. polyester. Plastic. containers. Synthetic. What are polymers. ?. Where can you find polymers in your everyday life?. How are polymers synthesized?. What kinds of polymers can be recycled?. How are polymers recycled?. What are some unique applications for polymers?. In order for chemical reactions to take place, . enzymes . must be present to help . speed up . the reaction.. Chemical bonds connect atoms. to make . molecules. .. Chemical . reactions. can do two things:. Noah Brubaker. June 29. th. , 2011. Hydrocarbons. ex: Alkanes. 1 – Meth-. 2 – Eth-. 3 – Prop-. 4 – But-. 5 . – . Pent-. 6 – Hex-. 7 – . Hept. -. 8. . – Oct-. 9. . – Non-. 10 – Dec-. M.P. KESAVAN M.Sc., Ph.D.,. Assistant Professor. Department of Chemistry. HKRH College. Uthamapalayam. .. 1. Polymers ???. 2. Polymers . may be naturally found in plants and animals (natural polymers) or may be man-made (synthetic polymers).. Announcements I. Mastering . Ch. . . 20 . assignment . (Organic Chemistry) due 12/10. After that (and the hand grading problem), I will assign class points (probably some bonus to reflect some bad homework problems).