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64 Cards in this Set
- Front
- Back
Giant molecules that are made up by the linkage of simpler molecules (monomers) by a polymerization reaction into essentially endless chain structures. |
polymer |
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It occur naturally, but the majority which are used commercially are manufactured from simple monomers. |
polymer |
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What are the 3 most well known natural polymers? |
1. proteins (polymers of amino acids) 2. nucleic acids (polymers of ribose or deoxyribose sugars with attached purine or pyrimidine bases) 3. glucose (starch, glycogen, cellulose) |
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What type of polymers were originally derived from natural polymers: protein, nucleic acids, glucose? |
synthetic polymer |
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what is the first commercially successful synthetic polymer which was first practically molded as a substitute for ivory in billiard balls? |
cellulose nitrate |
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In the nitration of cellulose, [C6H7O2(OH)3].xH2O, produces mixtures of cellulose trinitrate, called? and cellulose dinitrate? |
cellulose trinitrate: GUNCOTTON cellulose dinitrate: PYROXYLIN |
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Who discovered that pyroxylin, when mixed with camphor, becomes a thermoplastic, a substance which can be molded when heated? |
John Wesley Hyatt |
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It is explosive and its use in motion picture film and in billiard balls occasionally produced spectacularly inflammable incidents which was soon replaced it with cellulose acetate. |
cellulose nitrate |
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It was developed in the United States by the Belgian-born chemist Leo Baeckeland while searching for a substitute for varnish shellac. |
Phenol (C6H5OH)-formaldehyde resins |
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Heating these resins under pressure gave soft solids which could be molded and then hardened; they were both safe and economical. These early polymers have now been replaced by others based on simpler monomers. |
Phenol (C6H5OH)-formaldehyde resins |
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The polymer industry is normally divided into three (3) areas on the basis of the type of product manufactured. What are these? |
1. synthetic plastics 2. man-made textile fibers 3. synthetic rubber. |
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a molecule, made from joining together many small molecules called monomers |
polymer |
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a large molecule or a macromolecule which essentially is a combination of many subunits |
polymer |
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a naturally occurring biopolymer to polypropylene which is used throughout the world as plastic |
strand of DNA |
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What type of polymers can be naturally found in plants and animals? |
natural polymers |
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What type of polymers that is made by man? |
synthetic polymer |
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Polymers are all created by the process of polymerization wherein their constituent elements called? and are reacted together to form polymer chains i.e 3-dimensional networks forming the polymer bonds. |
monomers |
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2 Classification of Polymers based on ORIGIN |
1. Natural Polymers 2. Synthetic Polymer |
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They occur naturally and are found in plants and animals. For example proteins, starch, cellulose, and rubber. |
Natural Polymer |
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What do you call thề biodegradable polymers? |
biopolymers |
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These are man-made polymers. |
Synthetic polymers |
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What is the the most common and widely used synthetic polymer. It is used in industries and various dairy products. For example, nylon-6, 6, polyether‟s etc? |
plastic |
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2 Classification of Polymers based on CHEMICAL STRUCTURE |
1. Homopolymer 2. Copolymer |
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What polymer which consists of one type of monomer? Examples: polyethelyne, polystyrene, etc. |
Homopolymer |
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What polymer which is derived from more than one type of monomer? Examples: polyethelyne-vinyl acetate (PEVA), Acrylonitrile Butadiene Styrene (ABS) |
Copolymer |
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3 Classification of Polymers based on POLYMERIC STRUCTURE |
1. LINEAR polymer 2. BRANCHED-CHAIN polymer 3. CROSS-LINKED polymer |
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The structure of polymers containing LONG and STRAIGHT chains fall into this category. PVC, i.e. poly-vinyl chloride is largely used for making pipes and electric cables is an example of this type of polymer based on polymeric structure. |
LINEAR |
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When linear chains of a polymer form branches, then, such polymers are categorized as? Example: Low- density polythene. |
BRANCHED-CHAIN |
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They are composed of bifunctional and trifunctional monomers. They have a stronger covalent bond in comparison to other linear polymers. Ex: Bakelite and melamine |
CROSS-LINKED |
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2 Classification of Polymers based on ARRANGEMENT OF MONOMERS |
1. Block polymer 2. Graft polymer |
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It consists of relatively long sequences of identical monomer units. |
Block polymer |
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It is a branched polymer whose backbone is formed from one type of monomer and branches are formed from other type of monomer. |
Graft polymer |
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3 Classification of Polymers based on TACTICITY |
1. ISOTACTIC polymer 2. SYNDIOTACTIC polymer 3. ATACTIC polymer |
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it is the orientation of monomer units in a polymer molecule with respect to the main chain |
tacticity |
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What type of polymer where the side groups of the polymer lie on the same side of the chain based on tacticity? |
isotactic |
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What type of polymer where the side groups of the polymer are arranged in an alternate manner based on tacticity? |
syndiotactic |
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What type of polymer where the side groups are arranged in an irregular or random manner around the main chain based on tacticity? |
atactic |
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2 Classification of Polymers based on thermal behavior |
1. THERMOPLASTICS 2. THERMOSETS |
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What type of polymers which are easily softened upon heating based on thermal behaviour? Examples: Acrylic, PVC, Polypropylene, Polystyrene, Teflon |
Thermoplastics |
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What type of polymers which change irreversibly into hard and rigid materials on heating and cannot be reshaped? Examples: Melamine Formaldehyde, Bakelite, Epoxy Resin |
Thermosets |
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2 Classification of Polymers based on molecular forces |
1. Elastomers 2. Fibers |
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What type of polymers which can be easily stretched by applying small stress based on molecular forces? Examples: Natural rubber (Polyisoprene), Synthetic rubbers |
elastomers |
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2 Classification of Polymers based on modes of synthesis |
1. Addition polymers 2. Condensation polymers |
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What type of polymers are formed when same monomers are added – these monomers are usually alkenes (hydrocarbons that contain double bonds) based on modes of synthesis ? |
ADDITION polymers |
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What type of polymers are formed when two monomers react with the elimination of smaller molecule (usually water, ammonia, methanol, or hydrogen chloride) based on modes of synthesis ? |
CONDENSATION polymer |
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What are sources of natural polymers? |
plants and animals |
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What are the sources of natural polymer in plants? |
1. cellulose 2. starch 3. rubber |
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It is a polymer made up of long strands of glucose, which is also called the “polysaccharide”. It is abundantly found in plants which give plants their sturdy structure. |
cellulose |
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It is an another polymer made up of glucose monomer units. It is made up by plants for them to store energy. It is a combination of “amylose” and ”amylopectin”. |
starch |
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It is a polymer that is obtained as a milky white fluid known as latex from a tropical tree. It is made up of Isoprene monomer units. |
rubber |
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What are the sources of natural polymer in animals? |
1. DNA (Deoxyribonucleic Acid) 2. Proteins 3. Silk |
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Polymer made up of monomer units called “nucleotides”. It is found in nearly all living cells. |
DNA (Deoxyribonucleic Acid) |
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4 Nucleotides (nucleic acid) that form our DNA |
1. Thymine 2. Cytosine 3. Guanine 4. Adenine |
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It is the section of the DNA that codes for a protein is called the genes. It also make all the enzymes needed to carry out the reaction in our bodies. |
Genes |
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It is a polymers made up of amino acids bonded together to create a long chain. It also make up our hair and muscles. |
Protein |
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10 Essential Amino Acids |
1. Arginine 2. Histidine 3. Isoleucine 4. Leucine 5. Lysine 6. Methionine 7. Phenylalanine 8. Threonine 9. Tryptophan 10. Valine |
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It is a kind of protein produced by silkworms to make their cocoon. It is also used for the production of cloth. |
Silk |
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2 Other Natural Polymers |
1. Lignin 2. Chitin |
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What polymer is found in trees, together with cellulose, and makes trees rigid? |
Lignin |
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It is a polymer which composes the exoskeleton of crustaceans such as crabs and shrimps. It is also found in the cell wall of fungi like mushrooms. |
Chitin |
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These polymers are mostly derived from petroleum/crude oil, and manufactured in factories. Polymers which include fibers, elastomers, and the most commonly encountered are PLASTICS. |
synthetic polymer |
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comes from the Greek word “plastikos”, which means “to grow or form”. |
PLASTIC |
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7 Types of Plastics |
1. Polyethylene Terephthalate (PET or PETE) Use: Containers of beverages 2. High-Density Polyethylene (HDPE) Use: Detergent bottles, Household cleaners for bottles 3. Polyvinyl Chloride (PVC) Use: Pipings, Wiring cables 4. Low-Density Polyethylene (LDPE) Use: Plastic bags, Packaging for computer hardware, plastic wraps 5. Polypropylene (PP) Use: Food containers 6. Polystyrene (PS) Use: Styrocups, styrofoam 7. Other (e.g. Polycarbonate (PC), and other plastics not included in 1-6) Use: Polycarbonate – alternative roofing, spectacle lenses |
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Other Synthetic Polymers |
1. Polyvynil Acetate (PVA) - regular glue 2. Ethylcyanoacrylic - superglue |