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首页> 外文期刊>Journal of Applied Polymer Science >Effect of thermal aging on the biodegradation of PCL, PHB-V, and their blends with starch in soil compost
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Effect of thermal aging on the biodegradation of PCL, PHB-V, and their blends with starch in soil compost

机译：热老化对土壤堆肥中PCL，PHB-V及其与淀粉共混物生物降解的影响

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摘要

Different proportions of starch were blended with poly(beta-hydroxybutyrate)-co-poly(beta-hydroxyvalerate) (PHB-V) or poly(epsilon-caprolactone) (PCL) by extrusion, and the mechanical (maximum tensile strength, elongation at break and Young's modulus) and thermal properties (by differential scanning calorimetry) were determined. The biodegradability of the blends in soil compost was also assessed after thermal aging for 192, 425, and 600 h at different temperatures. The maximum tensile strength of the PCL50 blend (containing 50% starch) was 35% lower than that of PCL and that of the PHB-V50 blend was 60% lower than that of PHB-V without thermal aging. PHB-V blends were more biodegradable than PCL blends. For the blends prepared, only the biodegradation of PHB-V25 was affected by thermal aging. (C) 2003 Wiley Periodicals, Inc. [References: 23]
机译：通过挤出将不同比例的淀粉与聚（β-羟基丁酸酯）-共聚（β-羟基戊酸酯）（PHB-V）或聚（ε-己内酯）（PCL）共混，并混合机械强度（最大拉伸强度，测定断裂和杨氏模量）和热性能（通过差示扫描量热法）。在不同温度下热老化192、425和600 h后，还评估了混合物在土壤堆肥中的生物降解能力。 PCL50共混物（含50％淀粉）的最大抗拉强度比PCL低35％，PHB-V50共混物的最大抗拉强度比未经热老化的PHB-V低60％。 PHB-V混合物比PCL混合物具有更高的生物降解性。对于制备的共混物，仅PHB-V25的生物降解受热老化的影响。 （C）2003 Wiley Periodicals，Inc. [参考：23]

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