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Questions and Answers
Which type of polymer consists of relatively long sequences of identical monomeric units?
Which type of polymer consists of relatively long sequences of identical monomeric units?
- Isotactic polymer
- Graft copolymer
- Block copolymer (correct)
- Thermoplastic polymer
What is the term for a polymer that consists of a mixture of more than one type of monomer?
What is the term for a polymer that consists of a mixture of more than one type of monomer?
- Thermoset polymer
- Copolymer (correct)
- Homopolymer
- Atactic polymer
Which type of polymer softens on heating and can be converted to any shape by molding?
Which type of polymer softens on heating and can be converted to any shape by molding?
- Elastomer
- Thermoplastic (correct)
- Thermoset polymer
- Fiber
What is the term for a polymer in which the side groups of the monomers are arranged on the same side of the chain?
What is the term for a polymer in which the side groups of the monomers are arranged on the same side of the chain?
Which type of polymer softens on heating, but does not become plastic and moldable?
Which type of polymer softens on heating, but does not become plastic and moldable?
What is the meaning of the word 'polymer'?
What is the meaning of the word 'polymer'?
What is the degree of polymerization?
What is the degree of polymerization?
Which type of polymer includes proteins, cellulose, and silk?
Which type of polymer includes proteins, cellulose, and silk?
What is the main difference between natural and synthetic polymers?
What is the main difference between natural and synthetic polymers?
What is the role of about 80% of today's chemists, including biochemists?
What is the role of about 80% of today's chemists, including biochemists?
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Study Notes
Types of Polymers
- Homopolymer: consists of relatively long sequences of identical monomeric units
- Copolymer: consists of a mixture of more than one type of monomer
Physical Properties of Polymers
- Thermoplastic: softens on heating and can be converted to any shape by molding
- Isotactic polymer: a polymer in which the side groups of the monomers are arranged on the same side of the chain
- Thermoset: softens on heating, but does not become plastic and moldable
Definition and Terminology
- Polymer: a large molecule composed of many smaller molecules (monomers) bonded together
- Degree of polymerization: the number of monomer units in a polymer chain
Natural Polymers
- Biopolymer: includes proteins, cellulose, and silk
Natural vs Synthetic Polymers
- Main difference: source of origin (natural: occurs in nature, synthetic: produced by humans)
Role of Chemists
- About 80% of today's chemists, including biochemists, work on developing and improving polymers
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