時分割光散乱法によるポリエチレンテレフタレート/タルク混合系の結晶化に関する速度論的研究
Time-resolved Light Scattering Studies of Crystallization in Mixtures of Poly (ethylene terephthalate) and Talc
篠田宜宏・奥山智子・岡本正已
Shinoda, Yoshihiro / Okuyama, Tomoko / Okamoto, Masami
We investigated the crystallization behavior in mixtures of poly (ethylene terephthalate) (PET) and talc using the time-resolved light scattering. The time variation of the orientation fluctuation was measured using on Hv optical geometry, and the induction time, overall crystallization rate, and linear growth rate (G), were estimated by an invariant method. G was analyzed on the basis of the Hoffman-Lauritzen theory. As the crystallization temperature Tc increased, a regime transition from III to II was found to occur in the PET/talc mixture and the neat PET. For the PET/talc system, the overall crystallization rate increased with increasing talc content. G however was independent of talc content, i.e., talc acted as a nucleating agent. The mixture also shows high crystallinity at low mold temperatures in the injection molding process.
Key words: Poly(ethylene terephthalate) / Talc / Crystallization kinetics / Hoffman-Lauritzen Theory / Nucleating agent