Engineering, 23.08.2021 21:00, fazegaze89
Which of the following would you expect to be elastomers and which thermosetting
polymers at room temperature? Justify your choices. (Note that some of these are neither
elastomers or thermosets and some are both.)
a) Linear and partially amorphous poly(vinyl chloride)
b) Lightly crosslinked polyisoproprene having a glass-transition temperature
of -60 o C.
c) Heavily corsslinked polyisoproprene having a glass transition temperature
of 50 o C
d) Phenol-formaldehyde (it is described in the book – look for it)
e) Linear and highly crystalline polyethylene
Answers: 1
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Water at 55c flows across a flat plate whose surface temperature is held constant at 95c. if the temperature gradient at the plate's surface for a given value of x is 18 c/mm, find a) local heat transfer coefficient. b) heat flux
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Which from the following instrument is commonly used to detect the high pitch butzing sound in bearings? [clo4] a)-digital ultrasonic meter b)-infrared camera c)-spectroscopic d)-vibrometer
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Answers: 1
Which of the following would you expect to be elastomers and which thermosetting
polymers at room...
Mathematics, 18.03.2021 01:00
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