Oligomers are low- molecular homologues of polymers. The term (the concept) The polymer is applied when the value n is greater than
Oligomers are low- molecular homologues of polymers. The term (the concept) The polymer is applied when the value n is greater than
(n 100). A copolymer is a product of the copolymerization reaction of at least two monomers. For example:
n(M1+M2) ...-M1-M2-M1-M2-M1-M2-M1-M2-….
The block in the copolymer alternates in the group form of different links:
...- M1-M1-M1-...M2-M2-M2-...M1-M2 -....
If other monomer molecules are connected to the main chain, then connected copolymers are formed:
Олигомерлер – полимерлердің төменгі молекулалық гомологтары. Полимер термині (ұғымы) n мәні үлкен болғанда қолданылады (n100).
Сополимер – кем дегенде екі мономердің сополимерлену реакциясының өнімі. Мысалы:
n(M1+M2) ...-M1-M2-M1-M2-M1-M2-M1-M2-….
Блок сополимерде әр түрлі буындар топтасқан түрде кезектесіп отырады:
...-M1-M1-M1-...M2-M2-M2-...M1-M2-….
Егер негізгі тізбекке басқа мономердің молекулалары жалғасса, онда жалғанған сополимерлер түзіледі: …-M1-M1-M1-M1-M1-M1-M1-M1-….
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Features of polymers from low molecular weight compounds polymers have a number of specific properties compared to low molecular weight compounds:
Features of polymers from low molecular weight compounds polymers have a number of specific properties compared to low molecular weight compounds:
The molecular weight of polymers is large and the macromolecule is a consistent structure, i.e. the length of the macromolecule is several times greater than its transverse amount.
Polymers are polydisperse or polymolecular, i.e. they contain macromolecules of different polymer lengths or have a different number of links. If the length of a macromolecule is different, then their molecular weight is also different. Therefore, the molecular weight is not a constant value for polymers.
