The structure of the natural rubber, gutta-percha is to be drawn. Concept introduction: Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans − 1 , 4 − polyisoprene .

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Answer 1

Question

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

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(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10

Answer 2

Question

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

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Answer 3

Question

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

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Answer 4

Question

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

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Answer 5

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

Answer 6

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

Answer 7

Chapter 26.5, Problem 26.11P

(a)

Interpretation Introduction

Interpretation:

The structure of the natural rubber, gutta-percha is to be drawn.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

Answer 8

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

Answer 9

(b)

Interpretation Introduction

Interpretation:

The reason corresponding to the fact that gutta-percha is not vey elastic even after it is vulcanised is to be stated.

Concept introduction:

Gutt-percha is the polyterpene which formed by the polymer of isoprene unit. All the double bonds in this polyterpene are positioned in the trans configuration. Thus, it is also known as trans−1,4−polyisoprene.

The chemical process of making the rubber more strong and elastic by heating it with sulphur is known as vulcanization of rubber. In this process, a three-dimensional cross-linking of polyisoprene bonded with each other by sulphur atoms takes place.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 26.2A - Show the intermediate that would result if the...Ch. 26.2A - Prob. 26.2P Ch. 26.2A - Prob. 26.3P Ch. 26.2B - Prob. 26.4P Ch. 26.2B - Prob. 26.5P Ch. 26.2B - Chain branching occurs in cationic polymerization...Ch. 26.2C - Prob. 26.7P Ch. 26.2C - Prob. 26.8P Ch. 26.2C - Chain branching is not as common with anionic...Ch. 26.3 - Prob. 26.10P

Solution Summary: The author explains that the structure of the natural rubber, gutta-percha is to be drawn.

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