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Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Justify each choice.
(a) Epoxy having a network structure
(b) Lightly crosslinked poly(styrene-butadiene) random copolymer that has a glass-transition temperature of -50(C
(c) Lightly branched and semicrystalline polytetrafluoroethylene that has a glass-transition temperature of -100(C
(d) Heavily crosslinked poly(ethylene-propylene) random copolymer that has a glass-transition temperature of 0(C
(e) Thermoplastic elastomer that has a glass-transition temperature of 75(C
A mixture containing 98 mol% methanol and 2 mol% of an inert contaminant is available as a feed to a formaldehyde plant. The fresh feed to a process consists of 1000 kmol/h of this mixture along with 200 kmol/h of oxygen. All of the oxygen is consume..
Consider an engine that operates at a low temperature of 25C and a higher temperature of 432C. Would it be possible to have an efficiency of 65% ?
Why a substance is being heated at a fast rate the temperature of decomposition
Mass of Air Required for Combustion of Fuel. A coal fired boiler uses fuel having the following analysis by mass:
Calculate equilibrium products at 500K for the reaction of 1 mole CO and 1 mole H2O according to the water-gas shift reaction (CO • H2O CO2 • H2) as a function of temperature four ways
What is the settling velocity in still air of a particle that is 40 µm in diameter and spherical? The particle has a density of 1400 Kg/m3. Use a density of 1.2 Kg/m3 and a viscosity
Develop the designed circuit using breadboard in the laboratory. Available thermal sensor can be used in the circuit. Discuss the effect of resistors on calibration of the sensor with specific emphasis on the sensitivity of the instrument.
The left side of of the mechanical energy equation has three terms: P/p, (1/2)av^2 and gz. show that each of these terms has the dimension of energy per mass of fluid by.... a) converting each term to units of Btu/lbm beginning with pressure in psi, ..
Estimate the diffusion coefficient of Oil Dispersant A in a 10 mole percent Dispersant A -sea water mixture. The concentrated solution is non-ideal
Grams of tin and lead, An alloy is 7 parts tin and 3 parts lead. How many grams of each are in 40g of the alloy? Let x= the number of grams of tin in the 40g of the alloy.
Derive a Differential Equation which will show how temperature in the tank changes with time. State assumption used. Solve this model to obtain T(t) given that T(t=200s) = 50°C.
Reconsider the Methanol Water Distillation. If the feed stream contains 60 mol % methanol, reevaluate reflux ratio, number of stages required, and the column diameter.
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