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What type of polymerization is initiated by an anion, often using monomers with electron-withdrawing groups?
What type of polymerization is initiated by an anion, often using monomers with electron-withdrawing groups?
Anionic Polymerization
What is the name of a polymer chain that lacks a regular arrangement of substituents along its backbone?
What is the name of a polymer chain that lacks a regular arrangement of substituents along its backbone?
Atactic
What type of compound contains the -N=N-. functional group and is often used as thermal initiators in radical polymerization?
What type of compound contains the -N=N-. functional group and is often used as thermal initiators in radical polymerization?
Azo Compound
What is the name of the process where an active radical is transferred to another molecule, ending the growth of a chain and potentially initiating a new one?
What is the name of the process where an active radical is transferred to another molecule, ending the growth of a chain and potentially initiating a new one?
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What is the name of the temperature above which the rate of depolymerization exceeds the rate of polymerization?
What is the name of the temperature above which the rate of depolymerization exceeds the rate of polymerization?
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What kind of polymerization involves the rapid addition of monomers to an active center?
What kind of polymerization involves the rapid addition of monomers to an active center?
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What term refers to the spatial arrangement of atoms in a polymer chain that can be changed by rotation around single bonds?
What term refers to the spatial arrangement of atoms in a polymer chain that can be changed by rotation around single bonds?
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What type of polymerization involves the use of two or more different monomers?
What type of polymerization involves the use of two or more different monomers?
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What is the name for the degree of structural order in a solid polymer, where chains arrange in a regular, repeating lattice?
What is the name for the degree of structural order in a solid polymer, where chains arrange in a regular, repeating lattice?
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What term refers to the number of monomer units in a polymer chain?
What term refers to the number of monomer units in a polymer chain?
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What is the name of a technique for measuring the volume change of a material as a function of temperature, often used to determine the glass transition temperature?
What is the name of a technique for measuring the volume change of a material as a function of temperature, often used to determine the glass transition temperature?
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What term refers to a measure of the breadth of the molecular weight distribution, calculated as the ratio of weight-average molecular weight to number-average molecular weight?
What term refers to a measure of the breadth of the molecular weight distribution, calculated as the ratio of weight-average molecular weight to number-average molecular weight?
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What is a technique for studying the viscoelastic properties of materials by measuring their response to an oscillating stress?
What is a technique for studying the viscoelastic properties of materials by measuring their response to an oscillating stress?
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What is the name of the process of establishing a relationship between the elution time of polymer standards in Size Exclusion Chromatography (SEC) and their known molecular weights?
What is the name of the process of establishing a relationship between the elution time of polymer standards in Size Exclusion Chromatography (SEC) and their known molecular weights?
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What term describes a polymer chain where chains of one monomer are grafted onto the backbone of another polymer?
What term describes a polymer chain where chains of one monomer are grafted onto the backbone of another polymer?
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What term refers to a polymer chain with alternating arrangements of substituents along the backbone?
What term refers to a polymer chain with alternating arrangements of substituents along the backbone?
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What is the name for the first step in chain-growth polymerization where an active center is formed that can add monomers?
What is the name for the first step in chain-growth polymerization where an active center is formed that can add monomers?
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What is the name of the step in chain-growth polymerization where the active center is deactivated, stopping chain growth?
What is the name of the step in chain-growth polymerization where the active center is deactivated, stopping chain growth?
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What term describes the arrangement of substituents along a polymer backbone?
What term describes the arrangement of substituents along a polymer backbone?
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What term describes the regularity of the arrangement of substituents along a polymer backbone?
What term describes the regularity of the arrangement of substituents along a polymer backbone?
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What is the name of a technique for analyzing the absorption of infrared radiation by a material to identify functional groups and molecular structure?
What is the name of a technique for analyzing the absorption of infrared radiation by a material to identify functional groups and molecular structure?
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What describes a spherical, semicrystalline structure formed by the radial growth of lamellae from a central nucleation point?
What describes a spherical, semicrystalline structure formed by the radial growth of lamellae from a central nucleation point?
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What kind of polymerization involves the stepwise reaction of functional groups?
What kind of polymerization involves the stepwise reaction of functional groups?
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What kind of a polymer chain is produced when cyclic monomers are opened to form linear chains?
What kind of a polymer chain is produced when cyclic monomers are opened to form linear chains?
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What is the term for a technique for separating molecules based on their hydrodynamic volume?
What is the term for a technique for separating molecules based on their hydrodynamic volume?
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What is the name of a measure of the cohesive energy density of a material, often used to predict solubility and miscibility?
What is the name of a measure of the cohesive energy density of a material, often used to predict solubility and miscibility?
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What is a measure of the viscous component of a material's response to an oscillating stress, representing the energy dissipated as heat?
What is a measure of the viscous component of a material's response to an oscillating stress, representing the energy dissipated as heat?
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What is a measure of a material's stiffness, defined as the ratio of stress to strain under tensile deformation?
What is a measure of a material's stiffness, defined as the ratio of stress to strain under tensile deformation?
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Study Notes
Anionic Polymerization
- Initiated by an anion, typically using monomers with electron-withdrawing groups.
Atactic
- Polymer chain lacking a regular arrangement of substituents along the backbone.
Azo Compound
- Compound containing the -N=N- functional group, often used as thermal initiators in radical polymerization.
Backbiting
- Intramolecular chain transfer in radical polymerization, leading to short-chain branching.
Block Copolymer
- Copolymer composed of blocks of different monomers covalently linked together.
Ceiling Temperature (Tc)
- Temperature above which the rate of depolymerization exceeds the rate of polymerization.
Chain-Growth Polymerization
- Polymerization where monomers are rapidly added to an active center.
Chain Transfer
- Process in radical polymerization where an active radical is transferred to another molecule, potentially initiating a new chain.
Cohesive Energy Density
- Measure of energy required to separate molecules in a condensed phase; related to intermolecular forces.
Conformation
- Spatial arrangement of atoms in a polymer chain that can be changed by rotation around single bonds.
Configuration
- Spatial arrangement of atoms in a polymer chain that can only be changed by breaking and reforming bonds.
Copolymer
- Polymer made of two or more different monomers.
Copolymer Equation
- Equation describing the instantaneous composition of a copolymer based on the reactivity ratios of the monomers.
Crystallinity
- Degree of structural order in a solid polymer where chains arrange in a regular, repeating lattice.
Degree of Polymerization (DP)
- Number of monomer units in a polymer chain.
Diad
- Sequence of two monomer units in a copolymer chain.
Dilatometry
- Technique for measuring volume change of a material as a function of temperature, often used to determine the glass transition temperature.
Dispersity (Đ)
- Measure of the breadth of molecular weight distribution; calculated as the ratio of weight-average molecular weight/number-average molecular weight.
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Description
Test your knowledge on key concepts of polymer chemistry, including various types of polymerization mechanisms and structures. Explore terms like anionic polymerization, azo compounds, and block copolymers to enhance your understanding of the subject.
