Fully biodegradable poly(3-hydroxybutyrate-co-hydroxyvalerate)/poly(ethylene succinate) blends:: Phase behavior, crystallization and mechanical properties
Fully biodegradable poly(3-hydroxybutyrate-co-hydroxyvalerate)/poly(ethylene succinate) blends:: Phase behavior, crystallization and mechanical properties
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完全可生物降解的聚（3-羟基丁酸酯-共-羟基戊酸酯）/聚（丁二酸乙二醇酯）共混物：相行为、结晶和机械性能
DOI：
10.1016/j.reactfunctpolym.2007.11.001
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发表时间：
2008-02-01
影响因子：
5.1
通讯作者：
Ikehara, Takayuki
中科院分区：
文献类型：
--
作者：
Miao, Laiquan;Qiu, Zhaobin;Ikehara, Takayuki
聚羟基丁酸-羟基戊酸酯共聚物（PHBV）和聚丁二酸乙二酯（PES）都是可生物降解的半结晶聚酯。采用差示扫描量热法（DSC）、偏光显微镜（POM）、广角X射线衍射（WAXD）和拉伸试验等方法对完全生物降解PHBV/PES共混物的相行为、晶体结构、结晶动力学和力学性能进行了研究。PHBV与PES是不混溶的，如通过与纯组分的玻璃化转变温度相对应的两个独立于组合物的玻璃化转变温度所证明的。此外，两相熔体进一步证实了PHBV和PES之间的不相容性。用DSC研究了PHBV/PES共混物的非等温结晶和等温结晶。在等温结晶的情况下，PHBV和PES的结晶速率随另一组分含量的增加而降低，但是，结晶机制不改变。通过拉伸试验研究了PHBV/PES共混物的力学性能。结果表明，PHBV共混物的拉伸强度、断裂伸长率、杨氏模量和韧性可以通过改变共混物的组成来调节。对于富含PHBV的共混物，共混一定量的PES可以显着提高断裂伸长率，同时仍然保持相当高的拉伸强度和杨氏模量。(C)2007爱思唯尔有限公司保留所有权利。
Poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) and poly(ethylene succinate) (PES) are both biodegradable semi-crystalline polyesters. Phase behavior, crystal structure, crystallization kinetics, and mechanical properties of fully biodegradable PHBV/PES blends were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), wide angle X-ray diffraction (WAXD), and tensile tests in detail. PHBV is immiscible with PES as evidenced by the two composition independent glass transition temperatures corresponding to those of neat components. Moreover, the biphasic melt further confirms the immiscibility between PHBV and PES. Nonisothermal and isothermal crystallization of PHBV/PES blends were studied by DSC. In the case of isothermal crystallization the crystallization rates of PHBV and PES decrease with increasing the content of the other component for both PHBV-rich and PES-rich blends; however, the crystallization mechanisms do not change. The mechanical properties of PHBV/PES blends were examined by tensile testing. It is found that the tensile strength, elongation at break, Young's modulus, and toughness of PHBV blends can be adjusted by changing blend composition. For PHBV-rich blends, blending some amount of PES can improve the elongation at break significantly while still keeping considerably high tensile strength and Young's modulus. (C) 2007 Elsevier Ltd. All rights reserved.