题目内容
（请给出正确答案）
A．cross linking occurs during deformation
B．oxidation occurs during deformation in air at room temperature
C．polymer chains tend to align themselves with the chain axis oriented along the direction of deformation
D．none of the above
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更多“The strength of a thermoplasti…”相关的问题
A、The resin matrix for thermoset prepregs is partially cured.
B、The resin matrix for thermoset prepregs is fully cross-linked
C、The thermoset prepregs are dramatically different from thermoplastic prepregs.
D、More commonly used in prepreg composite manufacturing is thermoset prepregs.
A．rubber has a relatively small number of covalent crosslinks and thermoplastic polymers have none
B．thermoplastics don't melt when heated but rubbers do
C．rubber can be subjected to extensive plastic deformation whereas typical thermoplastics have little plasticity
D．all of the above
A．different polymer chains in a thermoplastic are held together by relatively weak Van der Waals bonds which can be broken at relatively low temperatures
B．thermoplastics are only lightly crosslinked in comparison to thermosets
C．both of the above
D．neither of the above
A、Polyethylene
B、Nylon
C、Phenolics
D、Polystyrene
A、PP
B、PE
C、Epoxy
D、PET
The difference in achievement between the pupils are partly ________by their differences in age.
|
A) Reaction injection molding
B) Compression molding
C) Blow molding
D) Casting
, then the system is ( ).
A、Causal and linear time-invariant.
B、Causal and linear time-varient.
C、Non-causal and linear time-invariant.
D、Non-causal and linear time-variant.
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