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37 Cards in this Set
- Front
- Back
A copolymer in which two differentrepeat units alternate positions along the molecular chain. |
alternating copolymer |
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A type of polymer chain configuration (stereoisomer)in which side groups are randomly positioned on one side ofthe chain or the other. |
atactic |
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Designates monomers that may react to formtwo covalent bonds with other monomers to create a two dimensional chainlike molecular structure. |
bifunctional |
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A linear copolymer in which identical repeatunits are clustered in blocks along the molecular chain |
block copolymer |
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A polymer having a molecular structure ofsecondary chains that extend from the primary main chains. |
branched polymer |
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For crystalline polymers, a model thatdescribes the structure of platelet crystallites. Molecularalignment is accomplished by chain folding that occurs at thecrystallite faces. |
chain-folded model |
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For polymers, a prefix denoting a type of molecular structure.For some unsaturated carbon chain atoms within arepeat unit, a side atom or group may be situated on one sideof the double bond or directly opposite at a 180_ rotation position.In a cis structure, two such side groups within the samerepeat unit reside on the same side (e.g., cis-isoprene) |
cis |
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A polymer that consists of two or more dissimilarrepeat units in combination along its molecular chains. |
copolymer |
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A polymer in which adjacent linear molecular chains are joined at various positions by covalent bonds. |
crosslinked polymer |
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For polymers, the state in which a periodic andrepeating atomic arrangement is achieved by molecular chainalignment. |
crystallinity |
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A region within a crystalline polymer in which all themolecular chains are ordered and aligned. |
crystallite |
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The average number of repeatunits per polymer chain molecule. |
degree of polymerization |
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The number of covalent bonds a monomer canform when reacting with other monomers. |
functionality |
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A copolymer in which homopolymer side bybranches of one monomer type are grafted to homopolymermain chains of a different monomer type. |
graft copolymer |
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A polymer having a chain structure in which allrepeat units are of the same type |
homopolymer |
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The phenomenon by which two or more polymermolecules or repeat units have the same composition but differentstructural arrangements and properties. |
isomerism |
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A type of polymer chain configuration (stereoisomer)in which all side groups are positioned on the same side of thechain molecule. |
isotactic |
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A polymer produced from bifunctional monomersin which each polymer molecule consists of repeat unitsjoined end to end in a single chain. |
linear polymer |
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A huge molecule made up of thousands ofatoms. |
macromolecule |
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With regard only to composition,not the structure of a repeat unit. |
molecular chemistry (polymer) |
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With regard to atomic arrangements within and interconnections between polymer molecules |
molecular structure |
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The sum of the atomic weights of all theatoms in a molecule. |
molecular weight |
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A stable molecule from which a polymer is synthesized |
monomer |
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A polymer produced from multifunctionalmonomers having three or more active covalent bonds, resultingin the formation of three-dimensional molecules. |
network polymer |
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A compound of high molecular weight (normally organic),the structure of which is composed of chains of small repeat units |
polymer |
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A polymer in which two different repeatunits are randomly distributed along the molecular chain. |
random copolymer |
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The most fundamental structural unit in a polymerchain. A polymer molecule is composed of a large number ofrepeat units linked together. |
repeat unit |
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A carbon atom that participates in only single covalent bonds with four other atoms. |
saturated |
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An aggregate of ribbon-like polymer crystallites(lamellae) radiating from a common central nucleation site; thecrystallites are separated by amorphous regions. |
spherulite |
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Polymer isomerism in which side groupswithin repeat units are bonded along the molecular chain inthe same order but in different spatial arrangements. |
stereoisomerism |
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A type of polymer chain configuration (stereoisomer)in which side groups regularly alternate positions onopposite sides of the chain. |
syndiotactic |
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A copolymeric material thatexhibits elastomeric behavior yet is thermoplastic in nature.At the ambient temperature, domains of one repeat unit typeform at molecular chain ends that crystallize to act as physicalcrosslinks. |
thermoplastic elastomer |
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. A semicrystalline polymeric materialthat softens when heated and hardens upon cooling. Whilein the softened state, articles may be formed by molding orextrusion. |
thermoplastic (polymer) |
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A polymeric material that, once havingbeen cured (or hardened) by a chemical reaction, will notsoften or melt when subsequently heated. |
thermosetting (polymer) |
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For polymers, a prefix denoting a type of molecularstructure. For some unsaturated carbon chain atoms withina repeat unit, a single side atom or group may be situated onone side of the double bond, or directly opposite at a 180_rotation position. In a trans structure, two such side groupswithin the same repeat unit reside on opposite sides (e.g.,trans-isoprene). |
trans |
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Designating monomers that may react to formthree covalent bonds with other monomers. |
trifunctional |
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Describes carbon atoms that participate in doubleor triple covalent bonds and, therefore, do not bond to a maximum of four other atoms. |
unsaturated |