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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
upon responding to a 200 a.m. domestic transportation mishap your hazmat team determines that a liquefied compressed
Solid NH4NO3 (ammonium nitrate) decomposes on heating to 400°C, forming N2O gas and water vapor, H2O. (a)Write a balanced chemical equation
production of chemicals from coalcoal has been considered a major component of u.s. energy reserves for a long time and
two important allotropes of elemental phosphorus are white phosphorus and red phosphorus a. why should gloves be worn
3.5 Calculate the reactor volumes required to process I043 liter/min of 3 molar .4 in the aqueous reaction A -+ 2B for PFTR and CSTR reactors. (a) 90% conversion, k 2 min-I (b) 99% conversion, k = 2 mole liter-' min-(c) 99.9% conversion, k 2 mole lit..
the path followed by a fixed amount of a perfect gas during a reversible process is described by the following
The band gap of indium gallium arsenide varies based on the concentration of gallium in the material. A sample of indium gallium arsenide absorbs light with a wavelength less than 1.37 microns. What is the band gap of the indium gallium arsenide samp..
air at 4mpa and 3000c enters a will insulated turbine operating at steady state with negligible velocity. the air
Explain in detail the working of the instrument. Description should include neat diagram, principle of working and the source of literature.
If an externally applied electric field produces a 5% expansion of the lattice, compute the dipole moment for each Na+-Cl- pair. Assume that this material is completely unpolarized in the absence of an electric field.
Indium antimonide (InSb) is a semiconductor with a narrow band gap of 0.17eV and an intrinsic carrier concentration of 2×1016cm-3. The mobility of electrons in InSb is 78000 cm2/V⋅s and their effective mass is 0.014m0, while the holes have a mobility..
Job Analysis of a Chemical Engineer, Develop documentation for human resources professionals to manage a specific employment position. The materials you create would assist human resources professionals to choose
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