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首页> 外文期刊>Journal of Polymers and the Environment >Effect of Gamma Radiation on the Properties of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Poly(ε-Caprolactone) Blends
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Effect of Gamma Radiation on the Properties of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Poly(ε-Caprolactone) Blends

机译：γ辐射对聚（3-羟基丁酸酯-co-3-羟基戊酸酯）/聚（ε-己内酯）共混物性能的影响

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摘要

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(ε-caprolactone) (PCL) and a PHBV/PCL blend with a 75/25 composition (wt%) were processed by injection molding and then subjected to 50 and 100 kGy of gamma radiation. The crystallinity of pure PHBV and PCL and the PHBV/PCL blend was found to increase slightly after gamma radiation, suggesting that radiation in the doses studied here probably caused the scission of polymer chains. The slight increase in crystallinity sufficed to significantly augment the Young’s modulus and ultimate tensile strength of the materials and to decrease their elongation at break. The shifts in the Tg of pure polymers in the PCL/PHBV blend suggest that a chemical interaction was favored by exposure to gamma radiation.
机译：聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）和聚（ε-己内酯）（PCL）和具有75/25组成（wt％）的PHBV / PCL共混物通过注塑成型加工，然后进行50和100 kGy的伽玛射线。发现纯PHBV和PCL以及PHBV / PCL共混物的结晶度在伽马射线辐照后略有增加，这表明此处研究剂量的辐照可能导致聚合物链断裂。结晶度的轻微增加足以显着提高材料的杨氏模量和极限拉伸强度，并降低其断裂伸长率。 PCL / PHBV共混物中纯聚合物的Tg的变化表明，暴露于伽马射线有利于化学相互作用。

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