For thermoplastics, explain the effects of increasing of each of the following properties on a polymer’s...
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
Homework Answers
A) Viscosity of thermoplastic decreases with increase in temperature.
B) increase in pressure increases the viscosity of thermoplastic.
C) viscosity decreases with increase in strain rate i. e
inversely Proptional to stain rate. 
Image source - Google
images
Add Answer to:
For thermoplastics, explain the effects of increasing of each of
the following properties on a polymer’s...
(a) Sketch the engineering stress-strain curves for thermoplastics, thermosets, and elastomers. (You do not need to...
(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.
1. What is difference amongst thermoplastic, thermosets and elastomers? Include one example of each. 2. Explain...
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...
2 Identify and explain three differenc between engineering thermoplastic and advanced thermoplastics. 3. Give three advantages...
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...
Predict the effects of (a) increasing the dielectric constant of a solvent, (b) increasing the ionic...
Predict the effects of (a) increasing the dielectric constant of a solvent, (b) increasing the ionic strength, and (c) increasing the pressure on the reactions of the following types: A2+ +B- X+ A+ +B2- X3+ A +B A+ B- Give a clear explanation in each case. What can you say about the entropy of activation to be expected in each case?
Which of the following physical properties can be used to measure temperature using a thermometer
Which of the following physical properties can be used to measure temperature using a thermometer?A. volumeB. pressureC. densityD. viscosityI think the correct answer is D?
Identify each of the following properties as more typical of an organic or inorganic compound and explain briefly. a) Co...
Identify each of the following properties as more typical of an organic or inorganic compound and explain briefly. a) Contains Li and F. b) is a gas at room temperature. c) produces ions in water. d) contains covalent bond.
1. Describe the effects each case for an 2. Describe the effects each case has for...
1. Describe the effects each case for an 2. Describe the effects each case has for an Sul reaction Write the rate law for an 52 reaction Write the rate law for an 5.2 reaction b. Increasing the concentration of the substrate (look at rate law) b. Increasing the concentration of the substrate (look at rate law) c. Increasing the concentration of the nucleophile or base (look at rate law) c. Increasing the concentration of the nucleophile or base look...
Problem 2. a. Explain qualitatively why ni increases with increasing temperature. b. How do the properties...
Problem 2. a. Explain qualitatively why ni increases with increasing temperature. b. How do the properties of wide-bandgap semiconductors differ from those of narrow bandgap semiconductors? Why do you think SiC, a wide-bandgap semiconductor, is used in high-temperature semiconductor devices? The figure below may be helpful for your response. e 1013 107 4H-SiC 1011 1.0 1.5 2.0 2.5 3.0 3.5 4.0 1000/Temperature (1/K)
Please explain why. A. Rank in order of increasing boiling point (1 = lowe order of...
Please explain why.
A. Rank in order of increasing boiling point (1 = lowe order of increasing boiling point (1 = lowest boiling point, 4 = highest boiling point). capabu Bollo poseerpomme B. Rank in order of increasing acidity (1 = least acidic, 4 = most acidic). C. Rank each isomer in order of increasing total strain energy (1 = lowest strain energy, 4 = highest strain energy). | HỌC CHỊ Ham Ham CH Roy Toft D. Rank in order...
(10 points) Define relaxation modulus and draw how it changes with increasing temperature for a g...
(10 points) Define relaxation modulus and draw how it changes with increasing temperature for a glassy polymer (15 points) Define relaxation time, and elaborate a reasoning to predict changes with temperature. 1. 2. (75 points) Derive the response of a Maxwell element in an engineering stress-strain test in which the rate of tensile strain is maintained constant. 3. Assume e 0 for t 0 and reasonable values for the constants: (a) Plot stress as a function of time. (b) Plot...
(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.
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. Describe the effects each case for an 2. Describe the effects each case has for an Sul reaction Write the rate law for an 52 reaction Write the rate law for an 5.2 reaction b. Increasing the concentration of the substrate (look at rate law) b. Increasing the concentration of the substrate (look at rate law) c. Increasing the concentration of the nucleophile or base (look at rate law) c. Increasing the concentration of the nucleophile or base look...
Problem 2. a. Explain qualitatively why ni increases with increasing temperature. b. How do the properties of wide-bandgap semiconductors differ from those of narrow bandgap semiconductors? Why do you think SiC, a wide-bandgap semiconductor, is used in high-temperature semiconductor devices? The figure below may be helpful for your response. e 1013 107 4H-SiC 1011 1.0 1.5 2.0 2.5 3.0 3.5 4.0 1000/Temperature (1/K)
Please explain why.
A. Rank in order of increasing boiling point (1 = lowe order of increasing boiling point (1 = lowest boiling point, 4 = highest boiling point). capabu Bollo poseerpomme B. Rank in order of increasing acidity (1 = least acidic, 4 = most acidic). C. Rank each isomer in order of increasing total strain energy (1 = lowest strain energy, 4 = highest strain energy). | HỌC CHỊ Ham Ham CH Roy Toft D. Rank in order...
(10 points) Define relaxation modulus and draw how it changes with increasing temperature for a glassy polymer (15 points) Define relaxation time, and elaborate a reasoning to predict changes with temperature. 1. 2. (75 points) Derive the response of a Maxwell element in an engineering stress-strain test in which the rate of tensile strain is maintained constant. 3. Assume e 0 for t 0 and reasonable values for the constants: (a) Plot stress as a function of time. (b) Plot...
Most questions answered within 3 hours.
-
I asked a question similar to this one, which was answered
perfectly. Another practice problem is...
asked 2 minutes ago -
Railco sells to its customers on account with terms of 2% / 5
/net 15. Ronco...
asked 7 minutes ago -
Refer to the following lease amortization schedule. The 10
payments are made annually starting with the...
asked 21 minutes ago -
Explain how God fits into Aquinas' theory of happiness.
asked 29 minutes ago -
1.1 With aid of diagrams and suitable examples discuss
the economic effects of price controls.
1.2...
asked 34 minutes ago -
When the nuclide polonium-214 undergoes alpha
decay:
The name of the product nuclide is .
The...
asked 48 minutes ago -
Q. The market demand function is D(Pd) = 160 - 2Pd and the
market supply function...
asked 53 minutes ago -
An unknown alcohol is analyzed by freezing point depression. The
unknown is either methanol (CH3OH), ethanol...
asked 54 minutes ago -
As a person inhales, air moves down the windpipe (bronchus),
through a constriction where the air...
asked 56 minutes ago -
Youngchang Keyboard sells a $1400 keyboard on a monthly payment
plan over 2 years.
a) If...
asked 1 hour ago -
For a one step reaction, the activation energy for the
forward reaction is 40.0 kJ mol-1,...
asked 1 hour ago -
1. A good thesis statement _____ .
is limited but not too narrow
is very broad...
asked 1 hour ago