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Engineering · Mechanical Engineering
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2006 A polymer named polyfostrin is very cheap and can be used for packaging of frozen food. Q.4) (a) which property of the polymer is more important for this application? Yield Strength (oy) or glass transition temperature (Tg)? The is more important. Beacuse (b) You are requested to find the yield strength and Tg of this polymer seperately. Which testing method(s) would you select, in order to find these properties? I would apply testing to find ơy. On the other I would apply polymer. testing to find Tg of this 15% Q5) You are given different polymers with different structural variables: Polymer Z: 600.000 gm/mole Polymer X: 450.000 gm/mole Polymer S: 600.000 gm/mole, 10% of available sites are cross-linked with S Polymer T: 600.000 gm/mole, 20% of available sites are cross-linked with S Polymer P: 600.000 gm/mole, 25% crystallinity Polymer R: 600.000 gm/mole, 40% crystallinity (a) From the given polymers Z and X, the (b) From the given polymers S and T, (c) From the given polymers P and R, the will have a higher UTS thewill have a higher hardness will have a higher melting point 10% Q2.) Why Cu and Al is generally more ductile than iron? Because
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