I which the following system will occur multistage polymerization? (a) CHI - CH2OH THỌ C (b) HỌ – CH2CH, -OH KHO-C O il (c) HO - CH₂CH₂ ◯=つ он + но (d) HO-CH₂ CH₂ - C -OH -G- e) HO-CH2CH2-OH - CIO C=O с OH
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- 3..Suggest how to make syndiotactic/isotactic polystyrene on the one hand and on the other hand how to synthesize atactic polystyrene. Justify your statement.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.5. Explain the determination of molecular weight of polymer samples usingdilute viscosity measurement.
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