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- what is the strain energy?11c. Nylon 6 and poly(ε-caprolactone) have similar polymer backbone structure with one carbonyl, 5 methylene and a heteroatom, nitrogen or oxygen, respectively. Each is able to undergo crystallization. However, their thermal transition temperature differs significantly. The glass transition temperature (Tg) for Nylon 6 is 52 °C, whereas the Tg for poly(εcaprolactone) is 112 degree lower than Nylon 6 at – 60 °C. Similarly, the melting temperature (Tm) for Nylon 6 is 223 °C, whereas the Tm for poly(εcaprolactone) is 60 °C. Briefly explain the significant differences in the thermal properties of these two polymers.Polymer PXX has a glass transition temperature of 49°C. Describe the molecular conformation and arrangement of this polymer
- 9. Write chemical names for polymers given below: ₤NH-8 POLYMER I Polycaprolactone [CH₂-CH] 0 C=0 CH3 POLYMER II poly (vinyl acetate) 10. Consider the two polymers from question 9: Polymer I has a degree of polymerization of 200, and Polymer II has a degree of polymerization of 1000. What polymer will have a higher value of real end- to-end distance in bulk? Assume that the values of characteristic ratio and bond length are the same for these polymers. (²)1/2 The equation for the end-to-end distance: (²) 1/2 = α(nC₁)¹²1 NWhich of these alkylamines can exhibit hydrogen bonding in the pure liquid? A 1 B. NO D. 1 and 2 2 and 3 HHHH ||| 1) H- C-C-C-N-H 11 HHH HHH H 2) H-C-C-N-C-H I НН H 4 H 3) H-C-N-C-H H CH₂ HSketch cis and trans structures for polychloroprene. Use two-dimensional Schematics.
- In which of these substances is significant hydrogen bondingpossible: methylene chloride (CH2Cl2), phosphine(PH3), chloramine (NH2Cl), acetone (CH3COCH3)?Consider the compounds 1-pentanol,CH3-CH2-CH2-CH2-CH2-OH, melting point -78C boiling point 138C, MW=88.15. 1,6-hexanediol ,HO-CH2-CH2-CH2-CH2-CH2-CH2-OH, mp 42C,bp=250C.MW=118.18. The compound 1,6-hexanediol is more soluble in water than 1-pentanol is. This is because 1,6-hexanediol.... 1) has more carbon atoms 2)has a higher molecular weight 3)has more -OH groups 4)is a solid at room temperature3. Give the structure of the addition polymer (Teflon). [total 4 point] Br Br + Br
- A long polymer chain, such as polyethylene ( -CH2CH2- )n, can potentially exist in solution as a chiral object. Give two examples of chiral structures that a polyethylene chain could adopt.(d) Crystalline polyethylene has a density of 1000 kg m³ and amorphous polyethylene a density of 865 kg m3. Calculate the volume fraction crystallinity of a sample of branched polyethylene which has a density of 900 kg m. Why is the crystallinity of this sample so low?10. Draw the structure of the polymer Tyr-Pro-Arg-Val-Ser. What type of compound is this polymer? What is the functional group that connects the units of this polymer together? Identify it in your drawing. Identify one type of 3° structure interaction in this polymer and illustrate it in your drawing.
