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Polyethylene: Polyethylene are formed by polymerization of ethylene under high pressure and at moderately high temperature. The resulting polymers are then subjected to substitution and other reactions to yield the required plastic. Polyethylene's have good chemical resistance electrical resistance low water absorption and good flexibility. These are much cheaper than other plastics. However high temperature and sunlight affects the properties of polyethylene's adversely e.g. resistance to chemicals falls drastically at higher temperature.
USES:
(1) Used in manufacture of toys and other house hold articles.
(2) Used for the manufacturer of domestic pipes and gas pippins.
PROPERTIES:
(1) Due to strong inter: chain forces tensile strength is quite high.
(2) It can be vulcanized to a little extent to form cross linked structures with improved mechanical properties due to the little presence of double bonds. Thus this rubber cannot be hardened due to small number of cross linkages.
(3) It is highly resistant to atmosphere heat abrasion acids oils alkalis oxygen and ozone.
(1) Used as an insulation material in the electrical industry and in rubber based industries like inner tubes for the tyres of bicycles rickshaws and automobiles.
(2) Used as a solid fuel for rockets.
Draw a two-dimensional model of a closed-packed assembly of spheres. Change this model into a three-dimensional one. How many dissimilar possibilities are there of stacking a)
define it
Uses of Unsaturated halides (Halo-alkene) The major use of vinyl chloride is in the manufacture of polyvinyl chloride that is abbreviated as PVC plastic that is employed these
various types of medicines use in daily life? and classify them into analgesics, antipyretics, antibiotics, sedatives, antiseptics.
Rutherford's alpha particle scattering experiment eventually led to the conclusion that: (1)The point of impact with matter can be precisely determined (2)Electrons occupy s
similarities between the latter actinides and latter lanthanides
Q. Test for the presence of argemone oil? This test helps to detect the presence of argemone oil. Argemone mexicana is the plant, which yields seeds of this oil. The seeds ar
The color of b-carotene The color of b-carotene is because of its chromophore of extensively conjugated double bonds. Catalytic hydrogenation would result in addition of hydrog
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how to calculate transport number by moving boundary method
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