Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
Be's 4th electron will have four quantum numbers: n l m s (1) 1 0 0 +1/2 (2) 1 1 +1 +1/2
Q. Explain about Molecular orbital theory? Molecular orbital theory is a completely different approach. It starts with identifying the metal orbitals and the ligand orbitals (h
how to select a parent chain
variation of cnductivigy with temperature
Cast iron is not appreciably malleable at any temperature as cast. The carbon in cast irons may be present in the form of iron carbide or free graphite. White cast iron contains ce
As the electron move away from the nucleus,its potential energy
Homocyclic or Carbocyclic - Closed Chain Compounds Homocyclic are the compounds that comprising a ring or rings of carbon atoms just only in the molecule. The homocyclic or c
What is dielectric strength Dielectric strength- It's the maximum voltage/field gradient (voltage per unit thickness) which the dielectric can withstand without failure/brea
What are photochemical reactions? Explain the mechanism of the photo- chemical reaction occurring among hydrogen and chlorine gas.
perkin ring clousre reaction
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd