(CH,), -N- nylon 6 the O H H (CH,), -C-N-(CH,),2-N- nylon 6,12 In What is the mole fraction of polymer chains possessing a degree of polymerization of 100 in the product mixture?
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- Using each of the following polymers, (a) (b) ... (c) H H H H H C C C=0c=0c=0 H CH2 CH, CH2 H;C H3C H3C (i) Draw the condensed formula for the polymer. (ii) Propose a structure for the monomer from which the polymer was synthesized. I-What is the degree of polymerization of each of the following polymers with molar mass 100,000 g/mol ? (a) polyacrylonitrile (b) polycaprolactam (c) poly(trimethylene ethylene-urethane) [Ans. (a) 1887; (b) 885; (c) 532] 1.3(4) Describe the synthesis of plastic especially polyethylene, 1,1- dichloroethane, and polyvinyl chloride
- Consider the following triglyceride || CH, - O - C (CH2)16 - CH3 T CH - O - C (CH,), CH = CH (CH,), CH3 || | CH, - O - C (CH2), CH = CH (CH,), CH, At room temperature, would the above triglyceride be a liquid or solid? is because of the bond. This(d) Another variation on this type of polymer is used in hair gels. In these, the polymer chains are cross-linked by a compound known as pentaerythritol. но- OH но- OH pentaerythritol ( By what type of chemicat reaction are the cross-links in this polymer formed? (i) it is important that the gel should be easily washed out of hair What is it about the structure of the polymer that allows this to happen?4. (a) (b) (c) (d) (e) (f) Draw the structure of the repeating unit in a polymer in which the monomer(s) is/are propylene 1,1-dichloroethylene vinyl acetate bisphenol A + phosgene ethylene glycol + terephthalic acid 1,4-chlorobenzene + sodium sulfide (a condensation polymerization affording NaCl)
- 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.Give handwritten answer- Write three characteristic features for Zieglar Natta polymerization.What is the fraction of monomers (p) that have been used in a stepwise polymerisation reaction if the reaction solution started with a monomer concentration of 1.58 mol L-1 and now has a concentration of 0.231 mol L-1?
- (4) Polybenzimidazoles are made by a two-stage step-growth melt polymerization: H2N- - NH2 -H20 H2N NH2 -фон What extent of reaction is needed to produce n = 200 in the above formula? Carry four decimal places in your answer.into the book. Write a concise definition of each, using examples as appropriate.Consider the following natural triglyceride || CH₂-O-C (CH2) 16 - CH3 I CH - O - C (CH,), CH = CH (CH,), CH3 || 1 O CH, - O - C (CH,), CH = CH (CH,), CH, Would this natural triglyceride have cis or trans double bonds?