Homework Answers
Here Polymer 3 has highest average degree of polymerization.
Polymer 2 & Polymer 4 are elimnated first because they are having bulky repetitive unit. Among Polymer 3 & Polymer 1 Polymer 3 has lesser weight in its repeitive unit. Polymer 1 have 5 (=CH2) group so it is also eliminated. Thus the answer is Polymer 3.
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calculate the Mn
Mw
PDI
Which of the following has the highest average degree of polymerization...
Which of the following has the highest average degree of polymerization (DP) with M-254000 g/mol Polymer...
Which of the following has the highest average degree of polymerization (DP) with M-254000 g/mol Polymer 1 mont N-(CH)s-C7 www-O-(CH)s-0- Polymer 2 (-CH (-) Polymer 3 Polymer 4
Which of the following has the highest average degree of polymerization (DP) with M=254000 g/mol 0...
Which of the following has the highest average degree of polymerization (DP) with M=254000 g/mol 0 mwang N-(CH)-47Polymer 1 **t0_ch)-oi que ce Pomer como los moments
. a.What is the average molar mass, Mn, of a sample of polyethylene, -(-CH2CH2-)-, which has...
. a.What is the average molar mass, Mn, of a sample of polyethylene, -(-CH2CH2-)-, which has a degree of polymerization, Pn, of 100? b. What is Pn of a polyethylene sample that has Mn = 56,000 g/mol? 5. Calculate Mn, Mw and the PDI of a polymer sample that contains equimolar amounts of chains with the following molar masses: 10 kg/mol, 20 kg/mol, 30 kg/mol, 50 kg/mol and 100 kg/mol. 6. During an end group titration of a carboxyl terminated...
Isotactic Polypropylene (C3H6 MW=42g/mol), a thermo plastic is synthesized using bulk polymerization. For a monodisperse sample...
Isotactic Polypropylene (C3H6 MW=42g/mol), a thermo plastic is
synthesized using bulk polymerization. For a monodisperse sample
(PDI=1) the bigger molecule(higher degree of polymerization)
contain the same total mass of the polymer sample than the smaller
molecules(lower degree of polymerization). For a polydisperse
sample the MW fractions do not contain the same mass.
Flexlife is the capability of polymeric material to withstand
repeated bending without fracture. The Z average MW (Mz) is a
measure of flexlofe as well as the predominance...
3. What is the no. average degree of polymerization (DP) of each of the following polymers...
3. What is the no. average degree of polymerization (DP) of each of the following polymers with M, 254,000? но th-chatti itomaan -O-CH2-CH2-0-C- ooo į
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by...
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by reacting of 1 mol butane-1,4 diol (HO-CH-CH2-CH2-CH2-OH) with 1 mol of adipic acid (HOOC-CH2-CH2-CH2-CH2-COOH) (a) Write chemical equation illustrating synthesis of the polyester. (b) Calculate the value of the monomer conversion at which the reaction should be stopped to obtain this polymer, assuming perfect stoichiometric balance. What would be polydispersity index for the polymer obtained? (c) Assuming that 0.5 mol % of the diol...
For polymerization of styrene in tetrahydrofuran at 25°C using sodium naphthalide initiator, the rate coefficient for...
For polymerization of styrene in tetrahydrofuran at 25°C using sodium naphthalide initiator, the rate coefficient for propagation is 550 dm^3 mol^-1 s^-1. If the initial mass concentration of styrene is 156 g dm^-3 and that of sodium naphthalide is 3.02x10^-2 g dm^-3, calculate the initial rate of polymerization and, for complete converison of the styrene, the number-average molar mass of polystyrene formed. Comment upon the expected value of molar mass dispersity (Mw/Mn) and the stereoregularity of the polystyrene produced. Assume:...
Polystyrene can be polymerized from the starting monomer (styrene) pictured below. a. Anionic polymerization is one...
Polystyrene can be polymerized from the starting monomer
(styrene) pictured below.
a. Anionic polymerization is one method of polymerization that
can be used to generate polystyrene from styrene. Explain what type
of initiator should be used for this reaction
and draw an example of a styrene monomer that has reacted with
initiator.
b. Using this anionic polymerization method and a starting
concentration of 1M styrene and 1mM initiator, what degree of
polymerization (Xn) would you expect if you use up...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range. 413 421 421 422 425 427 431 430 437 439 446 447 448 453 460 463 465 (a) Calculate a two-sided 95% confidence interval for true average degree of polymerization (as did the authors of the article). (Give answer accurate to 1 decimal place.) (430.1 446.2 X) Does the interval suggest that 440 is a plausible...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 416 420 422 422 425 427 430 435 437 439 445 446 449 451 456 463 465 (a) Construct a boxplot of the data. 420 430 440 450 420 430 440 450 460 420 430 440 450 460 420 430 440 450 460 Comment on any interesting features. (Select all that apply.) The data appears to...
Which of the following has the highest average degree of polymerization (DP) with M-254000 g/mol Polymer 1 mont N-(CH)s-C7 www-O-(CH)s-0- Polymer 2 (-CH (-) Polymer 3 Polymer 4
Which of the following has the highest average degree of polymerization (DP) with M=254000 g/mol 0 mwang N-(CH)-47Polymer 1 **t0_ch)-oi que ce Pomer como los moments
Isotactic Polypropylene (C3H6 MW=42g/mol), a thermo plastic is
synthesized using bulk polymerization. For a monodisperse sample
(PDI=1) the bigger molecule(higher degree of polymerization)
contain the same total mass of the polymer sample than the smaller
molecules(lower degree of polymerization). For a polydisperse
sample the MW fractions do not contain the same mass.
Flexlife is the capability of polymeric material to withstand
repeated bending without fracture. The Z average MW (Mz) is a
measure of flexlofe as well as the predominance...
3. What is the no. average degree of polymerization (DP) of each of the following polymers with M, 254,000? но th-chatti itomaan -O-CH2-CH2-0-C- ooo į
It is desired to prepare polyester with the number average molecular weight, Mn 5000 g/mol by reacting of 1 mol butane-1,4 diol (HO-CH-CH2-CH2-CH2-OH) with 1 mol of adipic acid (HOOC-CH2-CH2-CH2-CH2-COOH) (a) Write chemical equation illustrating synthesis of the polyester. (b) Calculate the value of the monomer conversion at which the reaction should be stopped to obtain this polymer, assuming perfect stoichiometric balance. What would be polydispersity index for the polymer obtained? (c) Assuming that 0.5 mol % of the diol...
Polystyrene can be polymerized from the starting monomer
(styrene) pictured below.
a. Anionic polymerization is one method of polymerization that
can be used to generate polystyrene from styrene. Explain what type
of initiator should be used for this reaction
and draw an example of a styrene monomer that has reacted with
initiator.
b. Using this anionic polymerization method and a starting
concentration of 1M styrene and 1mM initiator, what degree of
polymerization (Xn) would you expect if you use up...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range. 413 421 421 422 425 427 431 430 437 439 446 447 448 453 460 463 465 (a) Calculate a two-sided 95% confidence interval for true average degree of polymerization (as did the authors of the article). (Give answer accurate to 1 decimal place.) (430.1 446.2 X) Does the interval suggest that 440 is a plausible...
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 416 420 422 422 425 427 430 435 437 439 445 446 449 451 456 463 465 (a) Construct a boxplot of the data. 420 430 440 450 420 430 440 450 460 420 430 440 450 460 420 430 440 450 460 Comment on any interesting features. (Select all that apply.) The data appears to...
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