PDF-Introduction Degradable polymers have recently become

Introduction Degradable polymers have recently become highly attractive materials in solving the increasingly seri ous environmental problems due to plastic waste Current massproduced petroleumbased polymers are. Many people think of polymers simply as plastics used for packaging in household objects and for making fibres but this is just the tip of the iceberg Polymers are used in all sorts of applications you might not have thought much about before for ex 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 Polythiophene. for ‘Green. ’ . Organic Electronics. Tapping mode AFM (1 . m. m × 1 . m. m x 2 nm) height image showing the . nanofibrillar. morphology of a . polythiophene. -derivative conducting polymer film processed and annealed from water . What is petroleum?. Also known as crude oil. It is a thick black sludge. It comes from ancient plant and animal life long since buried and kept under extreme pressure for millions of years.. It is composed of countless different organic compounds.. Condensation Polymers. Involves 2 monomers that have different functional groups.. They also involve the elimination of water or another small molecule. . Hence the term . condensation. polymer. . Monomer A + Monomer B . Carbohydrates, lipids, proteins, and nucleic acids. Monomers. Glucose. Amino acids. Nucleotides . Fatty acids . Polymers. Carbohydrates . Nucleic acids. Lipids . Proteins . Carbohydrates. The word carbohydrate literally means “watered carbon.”. Polymers. are long molecules made of repeating units, called . monomers. .. In general. :. Specific example. :. Forces between polymer chains: Crosslinks. Weak: Intermolecular . force crosslinks. Strong: Colvalent. 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.. D 15.  Explain the general formation and structure of carbon-based polymers, including synthetic polymers, such as polyethylene, and biopolymers, such as carbohydrate. . Content Standard . What is a monomer and what is a polymer?. and . MER. means . repeating unit. .. Polymers. are macromolecules formed by joining of repeating structural units on a large scale.. The repeating structural units are called . Monomers. .. Polymerisation. 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. systems. ». The . study of biomaterials is called . biomaterials science. . It has experienced steady and strong growth over its history, with many companies investing large amounts of money into the development of new products. Biomaterials science encompasses . 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).. → . 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.