In the discussion of poly(ether ether ketone ), or PEEK, it is observed that the addition of a tert-butyl group to the aromatic ring increases the solubility of a PEEK in organic solvents. However, when researchers added a second tert-butyl group, they found that the solubility of the PEEK decreased. It is to be explained above observation. Concept introduction: The general rule for solubility is “Like dissolves like”, it means polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents. Hydrocarbons e.g. alkane are non-polar thus dissolves in the non-polar solvents (e.g. hexane, benzene) and insoluble in polar solvents. Methanol is a polar solvent, benzene is a non-polar solvent and dissolves most of the compounds having an aromatic ring of non-polar compounds. The symmetric molecule is non-polar and thus are not soluble in a polar organic solvent. The regular occurrence of pendant groups along a polymer chain increases Tg and Tm while Periodic or random branching of the polymer chain decreases the Tg and Tm.

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Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 26, Problem 26.64P

Interpretation Introduction

Interpretation:

In the discussion of poly(ether ether ketone), or PEEK, it is observed that the addition of a tert-butyl group to the aromatic ring increases the solubility of a PEEK in organic solvents. However, when researchers added a second tert-butyl group, they found that the solubility of the PEEK decreased. It is to be explained above observation.

Concept introduction:

The general rule for solubility is “Like dissolves like”, it means polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents. Hydrocarbons e.g. alkane are non-polar thus dissolves in the non-polar solvents (e.g. hexane, benzene) and insoluble in polar solvents. Methanol is a polar solvent, benzene is a non-polar solvent and dissolves most of the compounds having an aromatic ring of non-polar compounds. The symmetric molecule is non-polar and thus are not soluble in a polar organic solvent. The regular occurrence of pendant groups along a polymer chain increases Tg and Tm while Periodic or random branching of the polymer chain decreases the Tg and Tm.

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There are 48 pairs of students in the following table. Each pair has quantitatively determined the mass of taurine in a 250 mL can of the popular energy drink marketed as “Munster” using High Performance Liquid Chromatography (HPLC). The class results are presented below: QUESTION: Summarise and report these results including an indication of measurement uncertainty. In both calculation samples calculate if an outlier is present, max value, number of samples, mean, standard deviation, g (suspect), g (critical) and t (critical). Mass of Taurine (mg) Mass of Taurine (mg) (Table continued) 152.01 152.23 151.87 151.45 154.11 152.64 152.98 153.24 152.88 151.45 153.49 152.48 150.68 152.33 151.52 153.63 152.48 151.68 153.17 153.40 153.77 153.67 152.34 153.16 152.57 153.02 152.86 151.50 151.23 152.57 152.72 151.54 146.47 152.38 152.44 152.54 152.53 152.54 151.32…

Indicate the rate expressions for reactions that have order 0, 1, and 2.

Answer 2

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 26, Problem 26.64P

Interpretation Introduction

Interpretation:

In the discussion of poly(ether ether ketone), or PEEK, it is observed that the addition of a tert-butyl group to the aromatic ring increases the solubility of a PEEK in organic solvents. However, when researchers added a second tert-butyl group, they found that the solubility of the PEEK decreased. It is to be explained above observation.

Concept introduction:

The general rule for solubility is “Like dissolves like”, it means polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents. Hydrocarbons e.g. alkane are non-polar thus dissolves in the non-polar solvents (e.g. hexane, benzene) and insoluble in polar solvents. Methanol is a polar solvent, benzene is a non-polar solvent and dissolves most of the compounds having an aromatic ring of non-polar compounds. The symmetric molecule is non-polar and thus are not soluble in a polar organic solvent. The regular occurrence of pendant groups along a polymer chain increases Tg and Tm while Periodic or random branching of the polymer chain decreases the Tg and Tm.

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Answer 3

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 26, Problem 26.64P

Interpretation Introduction

Interpretation:

In the discussion of poly(ether ether ketone), or PEEK, it is observed that the addition of a tert-butyl group to the aromatic ring increases the solubility of a PEEK in organic solvents. However, when researchers added a second tert-butyl group, they found that the solubility of the PEEK decreased. It is to be explained above observation.

Concept introduction:

The general rule for solubility is “Like dissolves like”, it means polar compounds are soluble in polar solvents and non-polar compounds are soluble in non-polar solvents. Hydrocarbons e.g. alkane are non-polar thus dissolves in the non-polar solvents (e.g. hexane, benzene) and insoluble in polar solvents. Methanol is a polar solvent, benzene is a non-polar solvent and dissolves most of the compounds having an aromatic ring of non-polar compounds. The symmetric molecule is non-polar and thus are not soluble in a polar organic solvent. The regular occurrence of pendant groups along a polymer chain increases Tg and Tm while Periodic or random branching of the polymer chain decreases the Tg and Tm.

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Answer 4

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Chapter 26, Problem 26.64P

Interpretation Introduction