Morphology, melting behavior, and non-isothermal crystallization of poly(butylene terephthalate)/poly(ethylene-co-methacrylic acid) blends

作者：Huang Jiann Wen^*; Wen Ya Lan; Kang Chiun Chia; Yeh Mou Yung; Wen Shaw Bing

来源：Thermochimica Acta, 2007, 465(1-2): 48-58.

DOI：10.1016/j.tca.2007.09.004

• poly(butylene terephthalate)
• poly(ethylene-co-methacrylic acid)
• blend
• non-isothermal crystallization

The morphology, melting behavior, and non-isothermal crystallization of poly(butylene terephthalate) (PBT) and poly(ethylene-co-methacrylic acid) (PEMA) blends were studied with scanning electron microscopy, X-ray diffraction and differential scanning calorimetry (DSC). PEMA forms immiscible, yet compatible, blends with PBT. Subsequent DSC scans on melt-crystallized samples exhibited two melting endotherms (T-mI and T-mII). The presence of PEMA would facilitate the recrystallization during heating scan and retard PBT molecular chains to form a perfect crystal in cooling crystallization. The dispersion phases of molten PEMA acts as nucleating agents to enhance the crystallization rate of PBT. The solidified PBT could act as nucleating agents to enhance the crystallization of PEMA, but also retard the molecular mobility to reduce crystallization rate. The U* and Kg of Hoffman-Lauritzen theory were also determined by Vyazovkin's methods to support the interpretation.

• 出版日期2007-12-15