Study on the phase transition behavior of poly(butylene adipate) in its blends with poly(vinyl phenol).
Study on the phase transition behavior of poly(butylene adipate) in its blends with poly(vinyl phenol).
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DOI：
10.1021/jp110003m
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
Xiaoli Sun;Fuwei Pi;Jianming Zhang;I. Takahashi;Feng Wang;Shouke Yan;Y. Ozaki
中科院分区：
文献类型：
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作者：
Xiaoli Sun;Fuwei Pi;Jianming Zhang;I. Takahashi;Feng Wang;Shouke Yan;Y. Ozaki
通过红外 (IR) 光谱和 X 射线衍射 (XRD) 研究了聚己二酸丁二醇酯 (PBA) 晶体与聚乙烯基苯酚 (PVPh) 共混物的相变行为。 IR和XRD研究表明，PBA/PVPh比例为80/20和50/50共混物中PBA的C=O基团和PVPh的OH基团之间形成的氢键不影响PBA的溶液结晶行为。然而，共混物中 PBA 的相变行为因共混而显着改变。在纯PBA中，在25-47.5°C的温度范围内观察到1077、930和910 cm(-1)处的IR谱带强度的线性变化，随后伴随着β到α相变的发生而发生突变。在共混物中，这些红外波段的加速强度变化发生在 β 到 α 相变之前，这导致了不完美的 β-PBA 晶体在相对较低的温度下熔化。此外，还发现显着降低的 β 至 α 相变温度。
The phase transition behavior of poly(butylene adipate) (PBA) crystals in its blends with poly(vinyl phenol) (PVPh) was investigated by infrared (IR) spectroscopy and X-ray diffraction (XRD). The IR and XRD studies indicate that the hydrogen bonding between the C═O group of PBA and the OH group of PVPh developed in the PBA/PVPh blends with the ratios of 80/20 and 50/50 does not influence the solution crystallization behavior of PBA. The phase transition behavior of PBA in the blends is, however, significantly altered by the blending. In the neat PBA, linear changes of the intensities of IR bands at 1077, 930, and 910 cm(-1) are observed in the temperature range of 25-47.5 °C followed by an abrupt change corresponding to the occurrence of β-to-α phase transition. In the blends, the accelerated intensity changes of the those IR bands occur before the β-to-α phase transition, which is contributed to the melting of imperfect β-PBA crystals at relatively lower temperature. In addition, the significantly depressed β-to-α phase transition temperature is also identified.