TY - GEN
T1 - Non-isothermal melt crystallization behavior of poly(ethylene terephthalate)/graphene nanocomposites
AU - Aoyama, Shigeru
AU - Park, Yong Tae
AU - Ougizawa, Toshiaki
AU - Macosko, Chris
PY - 2013
Y1 - 2013
N2 - Poly(ethylene terephthalate)(PET)/graphene nanocomposites were prepared by melt mixing to characterize their gas permeability and mechanical properties. With 2 wt% of few layered graphene, PET/graphene composite films show more than 70% decrease in N2 gas permeation and 10-21% increase in storage modulus, E′. Their non-isothermal crystallization phenomena from the melt were also investigated by differential scanning calorimetory (DSC). Crystallization temperature, Tc, of PET/graphene nanocomposites was higher than that of PET/MWCNT nanocomposites. This suggests that the nucleation effect of graphene was higher than that of MWCNT and was enhanced with the increase in concentration of graphene. On the other hand, PET/graphene nanocomposites show shorter half crystallization time, t1/2, than neat PET at lower concentrations, and t1/2 increased along with concentration of graphene. From Raman spectroscopy, it was shown that PET chains in nanocomposites are confined strongly in the presence of an excess of graphene. This confinement effect suggests that crystal growth rate of PET was suppressed by graphene in nanocomposites.
AB - Poly(ethylene terephthalate)(PET)/graphene nanocomposites were prepared by melt mixing to characterize their gas permeability and mechanical properties. With 2 wt% of few layered graphene, PET/graphene composite films show more than 70% decrease in N2 gas permeation and 10-21% increase in storage modulus, E′. Their non-isothermal crystallization phenomena from the melt were also investigated by differential scanning calorimetory (DSC). Crystallization temperature, Tc, of PET/graphene nanocomposites was higher than that of PET/MWCNT nanocomposites. This suggests that the nucleation effect of graphene was higher than that of MWCNT and was enhanced with the increase in concentration of graphene. On the other hand, PET/graphene nanocomposites show shorter half crystallization time, t1/2, than neat PET at lower concentrations, and t1/2 increased along with concentration of graphene. From Raman spectroscopy, it was shown that PET chains in nanocomposites are confined strongly in the presence of an excess of graphene. This confinement effect suggests that crystal growth rate of PET was suppressed by graphene in nanocomposites.
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M3 - Conference contribution
AN - SCOPUS:84903522709
SN - 9781632665300
T3 - Annual Technical Conference - ANTEC, Conference Proceedings
SP - 316
EP - 320
BT - 71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013
PB - Society of Plastics Engineers
T2 - 71st Annual Technical Conference of the Society of Plastics Engineers 2013, ANTEC 2013
Y2 - 22 April 2013 through 24 April 2013
ER -