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首页> 外文期刊>Journal of Applied Polymer Science >Thermal properties of blends of poly(hydroxybutyrate-co-hydroxyvalerate) and poly(styrene-co-acrylonitrile)
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Thermal properties of blends of poly(hydroxybutyrate-co-hydroxyvalerate) and poly(styrene-co-acrylonitrile)

机译：聚（羟基丁酸酯-共-羟基戊酸酯）和聚（苯乙烯-共-丙烯腈）的共混物的热学性质

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Thermal properties of blends of poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV) and poly(styrene-co-acrylonitrile) (SAN) prepared by solution casting were investigated by differential scanning calorimetry. In the study of PHBV-SAN blends by differential scanning calorimetry, glass transition temperature and melting point of PHBV in the PHBV-SAN blends were almost unchanged compared with those of the pure PHBV. This result indicates that the blends of PHBV and SAN are immiscible. However, crystallization temperature of the PHBV in the blends decreased approximately 9-15 degrees. From the results of the Avrami analysis of PHBV in the PHBV-SAN blends, crystallization rate constant of PHBV in the PHBV-SAN blends decreased compared with that of the pure PHBV. From the above results, it is suggested that the nucleation of PHBV in the blends is suppressed by the addition of SAN. From the measured crystallization half time and degree of supercooling, interfacial free energy for the formation of heterogeneous nuclei of PHBV in the PHBV-SAN blends was calculated and found to be 2360 (mN/m)(3) for the pure PHBV and 2920-3120 (mN/m)(3) for the blends. The values of interfacial free energy indicate that heterogeneity of PHBV in the PHBV-SAN blends is deactivated by the SAN. This result is consistent with the results of crystallization temperature and crystallization rate constant of PHBV in the PHBV-SAN blends. (C) 2000 John Wiley & Sons, Inc. [References: 23]
机译：通过差示扫描量热法研究了通过溶液流延制备的聚（羟基丁酸酯-共-羟基戊酸酯）（PHBV）和聚（苯乙烯-共-丙烯腈）（SAN）的共混物的热性能。在通过差示扫描量热法研究PHBV-SAN混合物中，与纯PHBV相比，PHBV-SAN混合物中PHBV的玻璃化转变温度和熔点几乎没有变化。该结果表明PHBV和SAN的混合物是不相容的。然而，共混物中PHBV的结晶温度降低了约9-15度。从PHBV-SAN混合物中PHBV的Avrami分析结果来看，与纯PHBV相比，PHBV-SAN混合物中PHBV的结晶速率常数降低。根据以上结果，建议通过添加SAN来抑制共混物中PHBV的成核。根据测得的结晶半衰期和过冷度，计算出PHBV-SAN共混物中形成PHBV异质核的界面自由能，发现纯PHBV为2360（mN / m）（3），而2920-共混物为3120（mN / m）（3）。界面自由能的值表明，PHBV-SAN共混物中PHBV的异质性被SAN停用。该结果与PHBV-SAN共混物中PHBV的结晶温度和结晶速率常数的结果一致。 （C）2000 John Wiley＆Sons，Inc. [参考：23]

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