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 1

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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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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