Answer these two questions 1- Which of the following polymers is crystalline: (a) Starch (b) Thermosetting...
Answer these two questions
1- Which of the following polymers is crystalline:
(a) Starch
(b) Thermosetting
(c) elastomers
(d) polyacrylonitrile
2-Which of the following polymers has copolymer structure:
(a) polyethylene
(b) nylon 6,6
(c) polystyrène
(d) propylene
Homework Answers
1. Both starch and polyacrylonitrile have semi - crystalline structures.
2. Nylon 6,6 is a copolymer beacause it is made of two monomers - hexamethylenediamine and adipic acid.
all other options consists of polymers that are made from a single monomer.
Add Answer to:
Answer these two questions
1- Which of the following polymers is
crystalline:
(a) Starch
(b) Thermosetting...
please draw the Structure of monomer of the following polymers and classify whether they are thermosetting...
please draw the Structure of monomer of the following polymers and classify whether they are thermosetting or thermoplastic? Phenol formaldehyde Polystyrene Polyethylene Nylon 6,6
Draw the structure of the monomer(s) employed to form each of the following polymers shown in...
Draw the structure of the monomer(s) employed to form each of the following polymers shown in the table of polymers of commerical importance. (a) polyvinyl chloride (b) nylon 6,6 (c) polyethylene terephthalate
Use the figure to the below to answer the next three questions: Metal Polymers Polyetylengl WT...
Use the figure to the below to answer the next three questions: Metal Polymers Polyetylengl WT w Lowergy 0.01 COST | 17) Which of the following polymers is the most recyclable? a) Polyethylene b) Polystyrene c) Polyethylene terephthalate) = PET d) poly(vinyl chloride) - UPVC 18) If they all could be recycled regardless of their materials properties, which of the following polymers should have the highest recycling value? a) Nylon b) Aluminum c) Polyethylene terephthalate) = PET d) poly(vinyl chloride)...
Q11. 6 points Please Compare thermoplastic and thermosetting polymers (a) on the basis of mechanical characteristics...
Q11. 6 points
Please Compare thermoplastic and thermosetting polymers (a) on
the basis of mechanical
characteristics upon heating and (b) according to possible
molecular structures. (c) what
type of polymer material, thermosetting or thermoplastic, you
might select for the
following applications: a surgeon’s glove, a beverage
container, and a pulley.
Q12. 3 points
How do the glass-transition temperatures of polyethylene,
polypropylene, and
polymethyl methacrylate compare? Explain their differences,
based on the structure of
the monomer of each.
Q14. 4 points...
Questions for Experiment 8: Preparation and Properties of Polymers - Polyester and Nylon 1. Which polyester...
Questions for Experiment 8: Preparation and Properties of Polymers - Polyester and Nylon 1. Which polyester should be theoretically more rigid, the one obtained from ethylene glycol or the one from glycerol? Why? Explain with structural arguments. 2. Draw the structure for the polymer produced from the monomer vinylidene chloride CH-00) 3. Draw the structure of the copolymer produced from vinyl acetate and vinyl chloride. This copolymer is employed in some paints, adhesives, and paper coatings 00CH, CI coc Vinyl...
d) Decide which of the two resonance structures is the best Lewis structure for acrylonitrile. C=...
d) Decide which of the two resonance structures is the best
Lewis structure for acrylonitrile.
C= C— C= N 6. Acrylonitrile, C3H3N, is an important monomer in the manufacture of synthetic polymers, such as polyacrylonitrile. Uses include the production of plastics, surface coatings, nitrile elastomers, barrier resins, and adhesives. Its structure is given as " a) Complete the Lewis structure by adding all lone pairs. b) Add formal charges to the Lewis structure for acrylonitrile. c) A second structure can...
Page l7 Prelaboratory Questions Molecular Geometry 1. Does the following Lewis structure represent an anion, a...
Page l7 Prelaboratory Questions Molecular Geometry 1. Does the following Lewis structure represent an anion, a cation, or a molecule? If it represents an ion, what is the charge on the ion? 0: 2. Using the "octet rule" write the Lewis formulas for NF3 and NO3. 3. a) Explain in your own words what is meant by delocalized electrons. b) Draw all resonance structures for the nitrate ion. 4. Consider the molecule BF3. Two possible resonance structures are shown below....
i) Which of the following is not true about step-growth polymers? Formation of step-growth polymers usually...
i) Which of the following is not true about step-growth polymers? Formation of step-growth polymers usually results in the loss of a small molecule. Step-growth polymers are formed by the reaction of bifunctional molecules. Step-growth polymers can be formed by a free radical mechanism. Step-growth polymers are also known as condensation polymers. Step-growth polymers do not reach high molecular weight until the reaction has gone nearly to completion. ii) Which of the following are not termination methods in radical polymerization?...
1. When you compare thermosetting with thermoplastie polymers, which kind do you think is easier to...
1. When you compare thermosetting with thermoplastie polymers, which kind do you think is easier to recycle? Explain. 2. Draw the structural formula of the polymer that would be formed from a) CH2=CHCI b) CF2 = CF2 3. Very pure Poly(dimethyl siloxane) is used in many silicon implants such as ear prosthesis, chin and breast implant, catheter etc. The polymer is formed according to the reaction : CH, CH, n CI- Si-CI - HO-Si-OH - O-SI- 2n H, 0 CH,...
1. When you compare thermosetting with thermoplastic polymers, which kind do you think is easier to...
1. When you compare thermosetting with thermoplastic polymers, which kind do you think is easier to recycle? Explain. 2. Draw the structural formula of the polymer that would be formed from a) CH2 - CHCI may - b) CF2 = CF2 3. Very pure Poly(dimethyl siloxane) is used in many silicon implants such as car prosthesis, chin and breast implant, catheter etc. The polymer is formed according to the reaction : CH, сн. n C1--- Si-CI - HO-Si-OH- 2n H,...
Use the figure to the below to answer the next three questions: Metal Polymers Polyetylengl WT w Lowergy 0.01 COST | 17) Which of the following polymers is the most recyclable? a) Polyethylene b) Polystyrene c) Polyethylene terephthalate) = PET d) poly(vinyl chloride) - UPVC 18) If they all could be recycled regardless of their materials properties, which of the following polymers should have the highest recycling value? a) Nylon b) Aluminum c) Polyethylene terephthalate) = PET d) poly(vinyl chloride)...
Q11. 6 points
Please Compare thermoplastic and thermosetting polymers (a) on
the basis of mechanical
characteristics upon heating and (b) according to possible
molecular structures. (c) what
type of polymer material, thermosetting or thermoplastic, you
might select for the
following applications: a surgeon’s glove, a beverage
container, and a pulley.
Q12. 3 points
How do the glass-transition temperatures of polyethylene,
polypropylene, and
polymethyl methacrylate compare? Explain their differences,
based on the structure of
the monomer of each.
Q14. 4 points...
Questions for Experiment 8: Preparation and Properties of Polymers - Polyester and Nylon 1. Which polyester should be theoretically more rigid, the one obtained from ethylene glycol or the one from glycerol? Why? Explain with structural arguments. 2. Draw the structure for the polymer produced from the monomer vinylidene chloride CH-00) 3. Draw the structure of the copolymer produced from vinyl acetate and vinyl chloride. This copolymer is employed in some paints, adhesives, and paper coatings 00CH, CI coc Vinyl...
d) Decide which of the two resonance structures is the best
Lewis structure for acrylonitrile.
C= C— C= N 6. Acrylonitrile, C3H3N, is an important monomer in the manufacture of synthetic polymers, such as polyacrylonitrile. Uses include the production of plastics, surface coatings, nitrile elastomers, barrier resins, and adhesives. Its structure is given as " a) Complete the Lewis structure by adding all lone pairs. b) Add formal charges to the Lewis structure for acrylonitrile. c) A second structure can...
Page l7 Prelaboratory Questions Molecular Geometry 1. Does the following Lewis structure represent an anion, a cation, or a molecule? If it represents an ion, what is the charge on the ion? 0: 2. Using the "octet rule" write the Lewis formulas for NF3 and NO3. 3. a) Explain in your own words what is meant by delocalized electrons. b) Draw all resonance structures for the nitrate ion. 4. Consider the molecule BF3. Two possible resonance structures are shown below....
1. When you compare thermosetting with thermoplastie polymers, which kind do you think is easier to recycle? Explain. 2. Draw the structural formula of the polymer that would be formed from a) CH2=CHCI b) CF2 = CF2 3. Very pure Poly(dimethyl siloxane) is used in many silicon implants such as ear prosthesis, chin and breast implant, catheter etc. The polymer is formed according to the reaction : CH, CH, n CI- Si-CI - HO-Si-OH - O-SI- 2n H, 0 CH,...
1. When you compare thermosetting with thermoplastic polymers, which kind do you think is easier to recycle? Explain. 2. Draw the structural formula of the polymer that would be formed from a) CH2 - CHCI may - b) CF2 = CF2 3. Very pure Poly(dimethyl siloxane) is used in many silicon implants such as car prosthesis, chin and breast implant, catheter etc. The polymer is formed according to the reaction : CH, сн. n C1--- Si-CI - HO-Si-OH- 2n H,...
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