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 0 mwang N-(CH)-47Polymer 1 **t0_ch)-oi que ce Pomer como los moments
calculate the Mn
Mw
PDI
Which of the following has the highest average degree of polymerization (DP) with M= 254000 s mol - جون سيدة و #C - م ور مس ا دبستان در
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...
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...
4 (20 Points) Calculate the number-average molecular weight and the weight average molecular weight of a polymer sample made of polystyrene with a repeat unit of (CH2- CH(CHs)) and composed of two types of chains. 60 percent of the chains have a degree of polymerization of 7,000 and the rest 50,000. Carbon has an atomic weight of 12 g/mol and hydrogen is 1 g/mol.
. 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...
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...
Q6. 2/2 points
(a)What are the chemical formulas for the compounds below ?
Are the compounds shown
below isomers?
(b) Consider the two alkene compounds below? Which one is cis,
which one is trans?
Q7. 3/3/3 points
(a) What are addition polymerization steps?
(b) What type of polymerization does the below reaction
present?
(c) Calculate the degree of polymerization if 6,6-nylon has a
molecular weight of 120,000 g/mol, two repeating unit of Nylon6,6
shown in (b).
Q8. 4 points...
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges listed in the table is: f M Molecular weight range, g/mol 5,000-10,000 10,000- 15,000 15,000-20,000 20,000-25,000 0.30 0.20 0.35 0.15 Σ fi 1.00 What is the mass of one polymer chain in grams? b)
3) a) The average molecular weight Mm (g/mol) for a thermoplastic material that has the mean weight fractions f for the weight ranges...