Crystallization behavior, mechanical properties, and environmental biodegradability of poly(β-hydroxybutyrate)/cellulose acetate butyrate blends
Crystallization behavior, mechanical properties, and environmental biodegradability of poly(β-hydroxybutyrate)/cellulose acetate butyrate blends
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聚(β-羟基丁酸酯)/醋酸丁酸纤维素共混物的结晶行为、机械性能和环境生物降解性
DOI：
10.1002/app.12359
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发表时间：
2003
影响因子：
3
通讯作者：
Liguang Zhang
中科院分区：
文献类型：
--
作者：
Tiezhu Wang;G. Cheng;Ma Shihu;Z. Cai;Liguang Zhang
采用差示扫描量热法（DSC）、扫描电镜（SEM）、广角X射线衍射（XRD）和偏光显微镜（偏光显微镜）研究了聚β-羟基丁酸酯（PHB）/醋酸丁酸纤维素（CAB）共混物的相容性、结晶行为、拉伸性能和环境生物降解性。结果表明，在熔融状态下，PHB和CAB是相容的。随着CAB含量的增加，PHB相的结晶度和熔融温度降低，这拓宽了PHB狭窄的加工窗口。当断裂伸长率从2.2%增加到7.3%时，聚羟基丁酸酯的韧性和延展性得到改善。从降解试验中可以得出结论，降解是从表面到内部逐渐发生的，并且降解速率可以通过添加CAB含量来调节。
The miscibility, crystallization behavior, tensile properties, and environmental biodegradability of poly(β-hydroxybutyrate) (PHB)/cellulose acetate butyrate (CAB) blends were studied with differential scanning calorimetry, scanning electron microscopy, wide-angle X-ray diffraction, and polarizing optical microscopy. The results indicated that PHB and CAB were miscible in the melt state. With an increase in the CAB content, the degree of crystallinity and melting temperature of the PHB phase decreased, and this broadened the narrow processability window of PHB. As the elongation at break increased from 2.2 to 7.3%, the toughness and ductility of PHB improved. From the degradation test, it could be concluded that degradation occurred gradually from the surface to the inside and that the degradation rate could be adjusted by the addition of the CAB content.