j. What is the difference between thermoset and thermoplastics when both are heated repeatedly? k. Impurity...

j. What is the difference between thermoset and thermoplastics when both are heated repeatedly?

k. Impurity in metals and semiconductors both increase resistivity, yes or no?

l. Is plastic strain recoverable? Why?

m. What are the liquid ink-based 3d printing? (at least 2 methods)

Expert Solution

Ally Wells answered 9 months ago

What is the difference between Thermoplastics and Thermoset polymers? A)Thermoplastics can be moulded to shape, thermoset...

What is the difference between Thermoplastics and Thermoset polymers? A)Thermoplastics can be moulded to shape, thermoset cannot. B)Thermoplastics have covalent bonds that can be broken and reformed, thermoset does not. c. Thermoplastics have entangled polymerics units that can be untangled at elevated temperature, thermoset does not. d. Thermoset plastics are more flexible then thermoplastics. Q )What is/are the benefit(s) of short fibre reinforcements? A)Increased stiffness only. B)Increased strength and increased Toughness. C) Increased Toughness and increased flexibility. D) None of...

a) Distinguish between processing of thermoplastics and thermoset polymers to make a final product (the process...

a) Distinguish between processing of thermoplastics and thermoset polymers to make a final product (the process is not to make the polymer, but to make the final product) and relate this to the microstrucural differences of he polymers. b)Using the concept of the relation between glass transition temperature and stucture, explain why polyethylene is ductile at room temperature whereas polystyrene is brittle at room temperature. Please answer both parts

What is the primary defining difference between a thermoset and a thermoplastic material? (please explain with...

What is the primary defining difference between a thermoset and a thermoplastic material? (please explain with details)

what is the difference between K-factor and R-factor?

A mixture of water and graphite is heated to 600 K. When the system comes to...

A mixture of water and graphite is heated to 600 K. When the system comes to equilibrium it contains 0.13 mol of H2, 0.13 mol of CO, 0.43 mol of H2O, and some graphite. Some O2 is added to the system and a spark is applied so that the H2 reacts completely with the O2. Find the amount of CO in the flask when the system returns to equilibrium. Express your answer to two significant figures and include the appropriate...

A mixture of water and graphite is heated to 600 K . When the system comes...

A mixture of water and graphite is heated to 600 K . When the system comes to equilibrium it contains 0.11 mol of H 2 , 0.11 mol of CO , 0.31 mol of H 2 O , and some graphite. Some O 2 is added to the system and a spark is applied so that the H 2 reacts completely with the O 2 . Find the amount of CO in the flask when the system returns to equilibrium.

what is the difference between chemistry and chemical engineering ?? is it both are same ??...

what is the difference between chemistry and chemical engineering ?? is it both are same ?? howmuch syllabus is same as for both ?? what exactly chemist do and what exactly chemical engineer do ??

What are the drift speeds of Li+, Na+, and K+ in water when a potential difference...

What are the drift speeds of Li+, Na+, and K+ in water when a potential difference of 10 V is applied across a 1.00 cm conductivity cell? How long would it take an ion to move from one electrode to the other? In conductivity measurements it is normal to use alternating current: what are the displacements of the ions in centimeters during a half cycle of 1.0 kHz applied potential.

What is the reaction for oxidation of copper when heated?

What is the difference between ΔH° rxn and ΔH° ? Define both quantities.

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