sulfur polymer worksheet - Tagged

1. What is the mass per repeating unit of PET (in g / mol)? Explain why this number should be used for determining limiting reagent and yield and not the actual molecular weight of the polymer (which is >> 10,000 g / mol).

Polymer molecular weight dictates the properties of polymer materials. Show this effect using poly(ethylene ).

Please answer this!!!

Please complete the reaction exclusively employing the full structural formula.

Chemicals for which the commercially important plastic resins are derived are themselves derived from natural products that are quite plentiful;These raw materials include coal,  water lime stone, sulfur, salt and petroleum.  True or false.

1- Please find the typical molecular weight of the below common polymers. Compare them based on the degree of polymerization PET PC HDPE Polyamide Polyurethane Polystyrene 2- Write down three properties of polymers that are influenced by the size (i.e., the degree of polymerization and molecular weight), and describe briefly how the property changes with size.

Draw the structure of the polymer formed when this compound reacts with water, followed by heating. Draw the monomer unit, and use R1 groups to represent the point at which the monomer repeats. The R group tool is located in the charges and lone pairs drop-down menu. • You do not have to consider stereochemistry. •You do not have to explicitly draw H atoms. Do not include lone pairs in your answer. They will not be considered in the grading. IN 0 + / √n [ ] ?

Explain the importance of polymerisation reactions in your body and the world around you. Provide at least three examples.

9 This polymer is composed of 2 monomer units: an acid chloride and an amine. In the box below, draw the structure of both monomers. 1040 C-N n t • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu. 99-87 + T ? [F

The following diagram shows a polymer with four repeating units. Identify the correct monomer that was needed to form this polymer. H3 H₂ нснснсн | | | | с-с-с-с-с-с-с-с+ | | | | | | нннннн Н T a) С н-с-с Oc) H₂C Н- T H Н Н Н Н Н C- Г -C H CH3 Н O d) Н Н Н Ж H Н Н Н Н н н CH3 На C-H H HU I Н Н Н С -с-с-H A н н

6. Molecular weight data for some polymer are tabulated. Determine: a) The number-average molecular weight The weight-average molecular weight If it is known that this material's number-average degree of b) c) polymerization is 458, which one of the polymers listed in Table 16.3 is this polymer? d) What is the weight-average degree of polymerization for this polymer? Molecular Weight Range (g/mol) X W; 8,000-20,000 20,000-32,000 32,000-44,000 44,000-56,000 56,000-68,000 68,000-80,000 0.05 0.02 0.15 0.08 0.21 0.17 0.28 0.29 0.18 0.23 0.10 0.16 80,000-92,000 0.03 0.05

Answer the question in full and detailed sentences/paragraphs and use diagrams to explain your answer.

1. Draw 2D chemical representations of atactic, syndiotactic, and isotactic polystyrene. 2. Calculate molecular weights, Mn and Mw, of the following polymer solution. What is the polydispersity index? M1. 3000 g/mol 3000 chains M2. 3,000,000 g/mol 10 chains M3. 50,000 g/mol 200 chains 3. Draw and label the generalized polymer structures for a polyurethane, polyanhydride, polyester, polyamide and polyether. 4. How is crystallinity difference between metals, ceramics, and polymers? 5. For my medical device, I wish to create a material that is soft and will retain a lot of water. But I also want it to be rigid and can withstand up to 50lbs of force. What material should I use? 30°F Cle DO

Use the following atomic weights and quantities to calculate the overall % yield of diphenylacetylene. Remember that your yield must be based on the limiting reagent, and that grams must be converted to moles. For problems not involving a one to one stoichiometry it may be easier to calculate the theoretical yield in grams from both reagents to determine which is truly the limiting reagent. Filling out most of the chart will help. Give only two significant digits in your answer. If after rounding the answer is a whole number, do not include a decimal point. C = 12, H = 1, Br = 80, K = 39, O = 16 formula formula weight grams moles Answer: stilbene dibromide + potassium hydroxide 19.704 1.459 theoretical yield (g) % yield diphenylacetylene 2.063

Can you explain condensation polymerization and give an example with structure of one with 2 carboxylic acid groups and 2 OH groups.

what structure do i need to draw?

Poly(methyl methacrylate) (PMMA), more commonly known as acrylic glass, has the formula H3C H. H. Draw the monomer, given that this polymer forms by addition polymerization. Include all H atoms. Select Draw Rings More Erase | 7 / | H