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Q: The copolymerization of chloroethene and propene by free radical polymerizatlon produces which…
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- Write chemical reactions illustrating a polymerization mechanism involving the monomers listed below. Would the reactions be considered step growth or chain growth? Explain and supportWhat 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?Why do some polymers get stronger as we stretch them beyond a region where necking occurs?
- An alternating copolymer is known to have a number averagemolecular weight of 100,000 g/mol and a number average degree ofpolymerization of 2210. If one of the mers is ethylene, which of styrene,propylene, tetrafluoroethylene and vinyl chloride (Figure 1c) is the othermer? Show your calculations.Although styrene undergoes both cationic and anionic polymerization equally well, one method is often preferred with substituted styrenes.Which method is preferred with each compound? Explain.Although styrene undergoes both cationic and anionic polymerization equally well, one method is often preferred with substituted styrenes. Which method is preferred with each compound? Explain.
- A characteristic of the stoichiometry of condensation (step-growth) polymerization reactions is that small molecules, like H2O, HCl or others, are released as reaction by-products. In a commercial polymerization reactor, what might be some process implications of the release of small molecules like H2O or HCl?Discuss the suitable initiator to start an addition polymerization. Define what is auto-acceleration, what causes this effect and how to minimize this effect. Briefly discuss emulsion and suspension polymerization techniques.Write short note on the given topics: Co acervation method of microencapsulation
- Question 1 a. Briefly describe what is thermoplastic, thermoset plastic and elastomer. Give examples to clarify your answers. b. Briefly discuss the effect of thermodynamic on polymerization. c. What are important factors influencing the properties of polymers? Question 2 a. Discuss the suitable initiator to start an addition polymerization. b. Define what is auto-acceleration, what causes this effect and how to minimize this effect. c. Briefly discuss emulsion and suspension polymerization techniques. Question 3 a. Discuss the differences between condensation and addition polymerization. b. What requirement should be provided to achieve high yield and high molecular weight of polymer by condensation reaction? c. What is interfacial polymerization? Question 4 a. Describe biopolymer and synthetic polymer. Give examples to support your answer b. Briefly discuss the classification of polymers. c. Why polymers are widely used in our daily life? Question 5 a. Describe TWO (2) important…what is the diffrence between fibres and elastomers?Why PEEK polymer cannot be melt-processed with another polymer? To make a proper strand?