a molecule of high relative molecular mass. structure makes up the multiple representation of units derived
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oligmer
substance composed of oligmer molecules. Molecule of intermediate relative moleular mass, the structure of which essentially compromises a small plurality of units derived from molecules of lower relative molecular mass
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polymer microstructure
the physical arrangement of monomer residues along the backbone of the chain
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homopolymer
derived from one species of monomer
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copolymer
more than one monomer- statistical/random/alternating
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block copolymer
a copolymer consisting of macromolecules comprising monomeric species that have been segregated into different portions of the macromolecule
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graft polymer
a polymer consisting of macromolecules with one or more species of block connected to the main chains as side-chains
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polymer architrcture
the way branching leads to a deviation from a strictly linear polymer chain
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branched polymer
consiting of macromolecules comprising monomeric units that are not organised in a linear chain
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comb polymer
consisting of macromolecules comprising a main chain with multiple trifunctional branch points from each of which a linear side-chains emnates
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star polymer
consisting of macromolecules containing a single branch point from which linear chains emnate
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hyperbranched polymer
consisting of macromolecules comprising a main chain with multiple trifunctional branch points with no additional order in the polymer chain
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what does polymerisation often rely on
radical additions to double/triple bonds, nucleophilic additions, condensation of highly reactive intermediates, ring-opening of strained cycles
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step growth
involves successive reactionsbetween pairs of mutually reactive functional groups provided by monomers, Nylon6,6, PET, kevlar
growth is rapid later on
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Chain growth
polymerisations start from an initiator, polystyrene, polypropylene
growth is rapid early on
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Card 2
Front
macromolecule
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a molecule of high relative molecular mass. structure makes up the multiple representation of units derived
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