from an evironmental POV, which are better, thermoplastics or thermosets? explain why
from an evironmental POV, which are better, thermoplastics or thermosets? explain why
(a) Sketch the engineering stress-strain curves for thermoplastics, thermosets, and elastomers. (You do not need to consider temperature effects for this part of the problem). (b) Why do thermoplastics exhibit both linear elastic deformation and non-linear elastic deformation? 4. (c) Sketch three engineering stress-strain curves to elucidate the effect of temperature on the tensile behavior of thermoplastics.
What is the difference between Thermoplastics and Thermosets? Give one example for each category
2 Identify and explain three differenc between engineering thermoplastic and advanced thermoplastics. 3. Give three advantages of an adyanced thermoplastie composite over an ad. vanced thermoset composite. Give three advantages of the advanced thermoset over the advanced thermo- plastic 4. Why do engineering thermoplastics usually contain short fibers? 5. What are four key properties of compoe- ites that depend strongly on the nature of the resin? Indicate whether thermo- sets or thermoplastics would generally have the advantage in each of...
1. What is difference amongst thermoplastic, thermosets and elastomers? Include one example of each. 2. Explain how stress strain behaviour of thermoplastics, elastomers and brittle materials differ? Include stress strain curves. 3. What is a glass transition point? Explain through the curves for glass and crystalline materials. 4. How a temperature drop of 50 C below 0 C would affect polythene bottle? Explain. 5. What type of bonding explains function of adhesives? 6. Why plastic beams are not used to...
Thermoplastics have bonds which [Select] are strongest between the chains are strongest along the length of the chains are strongest in the cross links are strongest between the bulky side groups Thermosets have bonds which Select) are strongest along the length of the carbon chain are strongest in the cross links are strongest due to bulky side groups are strongest because of the addition of sulphur
Which do you think will have a larger impact on the density of a ceramic a Frenkel or Schottky defect? Why? Explain why thermoplastics can be softened by heating as opposed to thermosets. Show how two phase regions only need one variable to complete define the phase compositions as opposed to single phase fields which need two variables using the Gibb's phase rule.
For thermoplastics, explain the effects of increasing of each of the following properties on a polymer’s viscosity: a) Temperature b) Pressure c) Strain rate
Which of the following is true in the addition polymerization of thermosets? a. You cannot make thermosets by addition polymerization b. Polymerization only occurs in a diluent solution c. One carbon to carbon double bond is required d. Two carbon to carbon double bonds are required
Which country - the U.S. or Candan - has a better healthcare system? Explain why
a) What is the difference between thermoplastic and thermosets [at least 5 differences] (10) b) Give some examples for thermoplastic and thermoset polymers (5) c) How is elastomers differ from thermosets, explain in at least two sentences (5)