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!
Types Of Polymerisation
When some of bifunctional molecules connect in a chain structure, the reaction is termed as addition polymerisation. However, these polymerizations do not take place on its but has to be initiated, propagated and after that terminated. Presence of split H2O2 or 2HO usually initiates the reaction. Hydrogen peroxide is heated to split in two free radicals 2HO that initiates polymerisation. The energy of the chain polymer is lower than that of the independent monomers such form the chain and thus the chain grows in length fast after initiation. By addition of trace impurity the reaction is terminated. The reaction termination may airse because of two ends of joining of the chain or because of supply of exhaustion of the monomers also. Ethylene or C2H4 polymerising in polyethylene and vinylchloride or C2H3Cl polymerising in polyvinyl chloride are the illustrations of addition polymers.
The improvements in polymer technology have led to the knwoing that monomers of two various types can join in a single chain in co-polymerisation. For illustration, monomers of vinylaecetate and vinylchloride form a chain of copolymers as demonstrates in figure of Co-polymerisation of Vinylchloride or C2H3Cl and Vinylacetate or OCOCH3. Vinylacetate molecule along with dual bond between oxygen and carbon is also demonstrates in same figure. This double bond opens into two bonds to join along with another opened bond of carbon of vinylchloride.
Figure: Co-polymerisation of Vinylchloride or C2H3Cl and Vinylacetate or OCOCH3
A copolymer is greatly like a solid solution in crystalline materials because its properties are very much dissimilar than those of constituents.A third type of polymerisation reaction happens when a second non-polymerisation molecule is generated as a byproduct. This reaction is termed as condensation polymerization. The genearl byproducts of condensation polymerisation are water, CH3OH or HCl. In a characteristic reaction of polycondensation among hexamethylenediamine and adipic acid long chain nylon molecules are produced along with water as a byproduct.
what is correction couple&why it is needed
how is varignons theorem useful in engineering mechanics
can you give me a complete design of hydraulic fixture for turning and facing machine ? with all dimension an graph and analysis after apply the fixture
The Diameter Dimension Command You can use the Diameter command to annotate a circle or an arc with a diameter dimension. To achieve this simply start the command, pick a point
Theore m of perpendicular axis It states that if I X X and I Y Y be the M.I. of plane section about the two mutually perpendicular axes meeting at a point. Th
Calculate the crack Stress Intensity Factor: If on the beam specimen of last problem two loads, each equal to 500 N, are applied at distance of 25 mm from central plane, calcu
The Shaft is made of a material with an allowable shear strength of 80 Mpa. a. Develop the torque diagram b. Determine the minimum acceptable diameter of the shaft
Throughout this project, you'll find questions that will direct you to think about how you're creating the drawing. Although you should not submit the answers to these questions, a
In Figure P4.2 , ?1 = 200 rad/s cw and a1 = 4000 rad/s2 cw, Find the acceleration of points B, C, and D and the angular acceleration of link 2?
Tensile and Compressive Force: T ensil e Forces A force, that pulls the body, is called as tensile force. Here member AB is tension member carrying tensile force P. As
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