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首页> 外文期刊>Journal of Applied Polymer Science >Blends of Poly(3-hydroxybutyrate) with Poly(β-alanine) and Its Derivatives
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Blends of Poly(3-hydroxybutyrate) with Poly(β-alanine) and Its Derivatives

机译：聚（3-羟基丁酸酯）与聚（β-丙氨酸）及其衍生物的共混物

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摘要

Nanofibers and films of poly(3-hydroxybutyrate) (PHB)ylon 3 [poly(β-alanine) (N3)], PHB/poly(α-methyl-β-alanine) (2mN3), and PHB/poly(β-methyl-β-alanine) (3mN3) blends were prepared by electrospinning and film-casting techniques, respectively. The miscibility of the blends was studied by Fourier transform infrared spectrometry, differential scanning calorimetry, thermogravimetric analysis, and X-ray diffraction (XRD). The electrospinnability of the blends was studied by scanning electron microscopy. Some characteristic IR absorption bands of the components in the blends shifted gradually with changes in the compositions. The melting temperature and decomposition temperature of PHB decreased gradually with increasing fractions of N3, 2mN3, and 3mN3. The XRD spectra of all of the blends exhibited peaks with lower intensities compared to those of the neat species. The suppression of PHB crystallinity in the blends after blending was attributed to the disruption of its crystal lattice and the prevention of recrystallization of each component by means of other components and segmental interactions between the components in the amorphous phase. Thermal, spectroscopic, and optical analyses of the polymer blends revealed that the polymers were miscible with good compatibility, and this could have improved the scaffold properties of PHB.
机译：聚（3-羟基丁酸酯）（PHB）/尼龙3 [聚（β-丙氨酸）（N3）]，PHB /聚（α-甲基-β-丙氨酸）（2mN3）和PHB /聚（β）的纳米纤维和薄膜-甲基-β-丙氨酸）（3mN3）共混物分别通过静电纺丝和薄膜流延技术制备。通过傅里叶变换红外光谱法，差示扫描量热法，热重分析和X射线衍射（XRD）研究了共混物的混溶性。通过扫描电子显微镜研究共混物的电纺丝性。共混物中各组分的某些特征性红外吸收带随组成的变化而逐渐变化。随着N3、2mN3和3mN3含量的增加，PHB的熔融温度和分解温度逐渐降低。与纯种相比，所有混合物的XRD谱图均显示出强度较低的峰。共混后共混物中PHB结晶度的抑制归因于其晶格的破坏，以及通过其他组分防止各组分再结晶以及非晶相中各组分之间的分段相互作用。聚合物共混物的热，光谱和光学分析表明，该聚合物可混溶，相容性好，这可以改善PHB的支架性能。

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