EVI41c) Discuss the main purpose of vulcanization of natural rubberAN(4d) What is a biodegradable polymer? Give an example of a biodegradable aliphaticpolyester.

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Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter22: Organic Chemistry And Biochemistry

Section: Chapter Questions

Problem 9QE

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Give handwritten answer- Write three characteristic features for Zieglar Natta polymerization.
"Co-polymers" consist of two different monomers ("A" and "B") joined in analternating fashion (ABABAB...). Block co-polymers also consist of twodifferent monomers, but in this case, blocks of polymer containing only Aunits are joined to blocks of polymer containing only B units(AAAAABBBBB...). How block co-polymers are synthesized?
1. What requirement should be provided to achieve high yield and high molecular weight of polymer by condensation reaction? 2. What is interfacial polymerization 3. Describe biopolymer and synthetic polymer. Give examples to support your answer 4. Briefly discuss the classification of polymers. 5. Why polymers are widely used in our daily life?
1.Discuss the differences between condensation and addition polymerization.2.What requirement should be provided to achieve high yield and high molecular weight of polymer by condensation reaction?3.What is interfacial polymerization?4.Describe biopolymer and synthetic polymer. Give examples to support your answer5.Briefly discuss the classification of polymers.6.Why polymers are widely used in our daily life?
High pressure, high temperature free-radical polymerization of ethylene produces a) HDPE b) LDPE c) PP d) LLDPE
1. Answer the following questions: (a) Why is free radical polymerization more commonly used today than ionic polymerization? (b) Almost all substituted ethylene monomers of commercial importance have the structure of CH2 = CHR or CH2 = CRR’ (where R or R' represent identical or different substituent groups). Why? (c) What are some methods for the production of conductive polymers? Give a few examples.
Please Write a max of 5 pages reporta. Define , Describe Structure , Types , properties , Applications and examples of the Following :1. Biopolymers 2. Bioderived Polymers 3. Biodegradable Polymers 4. Sustainable polymers b. Differentiate the Biodegradable and Oxy-biodegradable polymers with examples.
Which of the following three compounds:- polyethylene [essentially no vapor pressure at 1 atm]- menthone [medium vapor pressure at 1 atm]- benzoic acid [low vapor pressure at 1 atm]Is most likely to be amenable to purification by sublimation? Why
the monomer units of amylose, the main component of starch, andglycogen, the animal stored carbohdrate, are both composed of a a-D-glucose monomers. however, the structural differences between these two polymers are remarkable: amylose is a coiled single stranded polysaccharaide while glycogen forms long branched networks. Explain the difference.
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.
A polymer closely related to PET is PBT, which is made from terephthalic acid and butane-1,4-diol.(a) Propose a structure for PBT and write the condensed formula for the structure.(b) What does PBT stand for? That is, what do you expect the trivial name of PBT to be?(c) Would you expect PBT to have a higher or lower melting point than PET? Justify your answer.(d) PBT, rather than PET, is used in molding because it crystallizes faster. Explain why PBT crystallizes more quickly than PET.
___________ containers must be used to package allmaterials suspected of containing hydrocarbonresidues.

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EVI41 c) Discuss the main purpose of vulcanization of natural rubber ANG d) What is a biodegradable polymer? Give an example of a biodegradable aliphatic polyester.