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Wednesday, June 30, 2010
Unit 3- Class 14- High Polymers (poly methyl methaacrylate)
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PMMA (poly methyl methaacrylate or plexi glass): It is obtained by the polymerization of methylmethacrylate using hydrogen peroxide as ini...
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Unit 3- Class 13- High Polymers (Some commercial polymers - Teflon)
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TEFLON (PTFE- polytetrafluoro ethylene): Teflon is the trade name for PTFE. The monomer TFE is obtained by the following reaction. ...
Unit 3- Class12- High Polymers (Some commercial polymers)
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POLYETHYLENE: is obtained by the polymerization of ethylene at high temperature. n (CH2=CH2)------------------>(-CH2-CH2...
Monday, June 28, 2010
Unit 3- Class 11- High Polymers (Structure property relationship of polymers)
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Structure property relationship of polymers: The fundamental properties, which influence the structure property relationship are molecular ...
Unit 3- Class 10- High Polymers (Glass transition temperature (importance of glass transition temperature))
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Importance of Tg: 1. Tg value is a measure of flexibility of a polymer. 2. Tg gives us idea of the thermal expansion, heat capacity...
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