Study on crystal morphology and melting properties of the isothermally crystallized poly(trimethylene terephthalate)
The spherulites’ morphology and melting properties of the poly(trimethylene terephthalate) formed in limited space at specific temperatures was studied by the polarized optical microscopy (POM). The results suggest that the spherulites’ morphology depends strongly on the temperature. When the isothermal crystallization temperatures increase from 190 to 225 ℃, the spherulites’ morphology continuously changes in the following order: nonbanded → regular banded → serrated banded → nonbanded spherulites. Furthermore, the band spacing increases with the crystallization temperature. Heating the banded spherulites will cause them melt as well as the changing of the bandings, especially the bandings changes in the following order: clear → faint → clear → disappear in a certain range of temperature, which is proposed for resulting from a lamellar melting-recrystallization-remelting mechanism.
Poly(trimethylene terephthalate) Crystal morphology Banded spherulites
Mingtao Run Yanping Hao Hongzan Song
Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Envi College of Economics, Hebei University, Baoding 071002, P. R. China
国际会议
2009 International Symposium on Liquid Crystal Science and Technology(2009国际液晶科技研讨会)
昆明
英文
259-262
2009-08-02（万方平台首次上网日期，不代表论文的发表时间）