Flashcards in Tut 1 Deck (14):
Give a reasonable explanation why the modern era maybe referred to as the age of plastics.
Due to their relatively low cost, ease of manufacturing, versatility and being impenetrable by water. Plastics are used in an enormous and expanding range of products.
*Plastics are have replaced many traditional materials, such as wood, stone, bone, paper, leather, glass, ceramic etc.
*In the modern era plastics are used for many different things such as building, packaging, gadgets, furniture, toys, and also in the medical field etc.
Provide a definition for a polymer
A large molecule built up from numerous small molecules. these large molecules may be linear, slightly branched or highly interconnected.
What is the difference between a synthetic and natural polymer
Are obtained naturally from plants and animals. examples: starch cellulose, proteins, natural rubber
Are man-made polymers or polymers that are synthesised in a lab. examples: polyethylene, polyvinyl chloride, nylon, synthetic rubbers.
Give three examples of a natural polymer
Starch, Cellulose, Proteins, Natural rubber
Give the full name for PVC.
Name two monomers used to make polyetehylene glycol and provide the chemical structures for the two monomers
Give the name and chemical structure for the monomer used to make PVC
What is a telechelic polymer
A polymer that contains a reactive end group
What is a macromere?
A monomer containing a large chain
What is a terpolymer?
a polymer synthesised from 3 different monomers
What is the difference between a homopolymer and a co-polymer?
A polymer synthesised from one kind of monomer
A polymer synthesised from more than one kind of monomer(i.e. two to be exact)
Describe and illustrate the differences between a linear, branched and network polymer.
A polymer consisting of a single continuous chain of repeat units. e.g Polyvinyl Chloride
A polymer that consists of side chains of repeat units connected to the main chain of repeat units
A crosslinked polymer that includes numerous interconnections between chains e.g. Vulcanised rubber
Define a thermoplastic, thermoset, and an elastomer and give examples of each
A material that becomes soft when heated and hard when cooled. Polyethylene Terephthalate
Polymers that are joined together by chemical bonds, acquiring highly crosslinked polymer structures. e.g. Phenol formaldehyde resins.
polymers that are good insulators, withstand deformation and are easily moulded into different shapes. e.g. Natural and artificial rubber.