Finally, a possible reciprocal interaction of PET and PLA in
the respective degradation mechanisms could also be invoked to
explain the mechanical results. Both degradation paths pass
through the formation of hydroxyl and carboxylic compounds. They
can be under the form of macromolecules with lower molecular
weight with respect to the parent polymer, oligomers, or even lowmolecular weight compounds. It is likely to suppose that, during
processing, hetero-macromolecule or oligomers (i.e. PET and PLA)
can couple to form copolymers. On the other hand, chain scission
induced by low molecular weight products can also occur.
The result is a competition between copolymer formation and
polymer degradation that can explain the mechanical results above
described
Finally, a possible reciprocal interaction of PET and PLA inthe respective degradation mechanisms could also be invoked toexplain the mechanical results. Both degradation paths passthrough the formation of hydroxyl and carboxylic compounds. Theycan be under the form of macromolecules with lower molecularweight with respect to the parent polymer, oligomers, or even lowmolecular weight compounds. It is likely to suppose that, duringprocessing, hetero-macromolecule or oligomers (i.e. PET and PLA)can couple to form copolymers. On the other hand, chain scissioninduced by low molecular weight products can also occur.The result is a competition between copolymer formation andpolymer degradation that can explain the mechanical results abovedescribed
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