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Chapter 30: Question 30.11 (page 1207)

ABS, a widely produced copolymer used in crash helmets, small appliances, and toys, is formed from three monomers- acrylonitrile (CH2=CHC鈮�N), buta-1,3-diene (CH2=CH-CH=CH2) , and styrene (CH2 =CHPh). draw a possible structure for ABS.

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01

ABS

ABS polymer also termed as 鈥榓crylonitrile butadiene styrene鈥� comes under the category of thermoplastic polymer. It can withstand several acids, alkalis, and vegetable & mineral oils. When subjected to elevated temperatures, it catches fire.

02

Monomers

Monomers possess a vital role in living organisms. They are the units of several biomolecules like DNA, RNA, and carbohydrates. Glucose that come under natural monomers is important for numerous bodily functions.

03

Predicting the possible structure for ABS from the monomers acrylonitrile, buta-1,3-diene, and styrene

The monomers of ABS acrylonitrile, buta-1,3-diene, and styrene can be given as:

Monomers of ABS

The monomersacrylonitrile, buta-1,3-diene, and styrene join in varying amounts to generate the copolymer ABS. The structure of ABS can be given as:

Structure of ABS

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Most popular questions from this chapter

Question:Kevlar (Section 30.6A) is a very stiff polymer because its backbone contains many aromatic rings and its polymer chains are extensively hydrogen bonded to each other. Draw a short segment of two Kevlar chains, and indicate how the chains are hydrogen bonded to each other.

Draw the structure of the three monomers used to prepare polybutyrateadipate terephthalate (PBAT), a biodegradable copolymer sold under the trade name of Ecoflex. Because PBAT has properties similar to low-density polyethylene, it can be used in biodegradable food packaging and plastic bags.

PBAT

Draw a stepwise mechanism for the anionic polymerization of styrene (CH2=CHPh) to form polystyrene -(CH2=CHPh)n using BuLi as an initiator. Use CO2 as the electrophile that terminates the chain mechanism.

Explain the differences observed in the Tg and Tm values for each pair of polymers:

(a) polyester A and PET;

(b) polyester A and nylon 6,6.

(c) How would you expect the Tm value for Kevlar (Section 30.6A) to compare with the Tm value for nylon 6,6? Explain your prediction.

Researchers at Rutgers University have developed biocompatible polymers that degrade into nonsteroidal anti-inflammatory drugs. For example, the reaction of two equivalents of benzyl salicylate and one equivalent of sebacoyl chloride forms a poly(anhydride ester) called PolyAspirin, which hydrolyzes to salicylic acid (an anti-inflammatory agent) and sebacic acid, which is excreted. This technology can perhaps be used for localized drug delivery at specific sites of injury. What is the structure of PolyAspirin?
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