| 초록 |
Cocrystallization of copolymers whose components are both crystallizable is a rare phenomenon, providing the possibility to control thermal and mechanical properties of copolymers without significant loss of their crystalline properties. The chemical structures of poly(octamethylene terephthalate) (POT) and poly(octamethylene 2,6-naphthalate) (PON) are very similar each other in that the benzene ring of POT is just replaced by the naphthalene ring of PON. POT and PON are considered to have high potential as fiber, film, and engineering thermoplastic materials, because they have relatively high melting temperatures and rapid crystallization. We have recently synthesized a series of P(OT-co-ON) copolymers based on OT and ON units, characterized their structures and compositions by 1H NMR spectroscopy, and investigated thermal properties and crystalline structures by DSC and WAXS, respectively. Here we report the effect of thermal history on cocrystallization of P(OT-co-ON) copolymers. |
