Elastic modulus E l of the crystalline regions of poly(ethylene-2,6-naphthalate) (PEN-2,6) in the direction parallel to the chain axis was measured by X-ray diffraction. The El value for the (74 1 1 0) plane of PEN-2,6 was 145 GPa at room temperature, which coincided with the calculated value (144 GPa) obtained by Treloar's method. The E~ value of PEN-2,6 is larger than that of poly(ethylene terephthalate) (observed, 108 GPa; calculated, 122 GPa). This difference could be attributed to the difference of the deformability between naphthalene and phenyl rings.
Посилання на статтю:
Elastic modulus of the crystalline regions of poly(ethylene-2,6-naphthalate / Katsuhiko Nakamae*, Takashi Nishino and Kazuhiro Tada and Tetsuo Kanarnoto and Masayoshi Itoand Tetsuo Kanarnoto and Masayoshi Ito // Polymer. – 1993. – Vol 34. – P. 3322-3324.