| SEBS-g-MAH增韧聚乳酸的性能研究 |
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| 引用本文： | 刘密密,魏发云,张瑜.SEBS-g-MAH增韧聚乳酸的性能研究[J].中国塑料,2011,25(4):38-41. |
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| 作者姓名： | 刘密密 魏发云 张瑜 |
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| 作者单位： | 东华大学 东华大学 |
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| 摘 要： | 采用哈克密炼机制备了聚乳酸(PLA)与马来酸酐接枝苯乙烯-乙烯-丁二烯-苯乙烯嵌段共聚弹性体(SEBS-g-MAH)的共混物，并对共混物的力学性能、流变性能和微观结构进行了分析。结果表明，共混物的拉伸强度随着SEBS-g-MAH含量的增加而下降，断裂伸长率随着SEBS-g-MAH含量的增加而增大。当SEBS-g-MAH的含量为30 %时，共混物的冲击强度提高了2.5倍，共混物的韧性得到提高。随着SEBS-g-MAH含量的增加，PLA熔体黏度的变化趋势与SEBS-g-MAH越来越相似，即熔体黏度随着频率的增大而下降。扫描电镜分析表明，MAH基团改善了两相间的界面作用，增韧作用明显。
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| 关 键 词： | 聚乳酸 马来酸酐接枝苯乙烯-乙烯-丁二烯-苯乙烯共聚物 增韧 力学性能 流变性能 |
| 收稿时间： | 2010-10-25 |
Study on Properties of Poly(lactic acid) Toughened by SEBS-g-MAH |
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| LIU Mimi,WEI Fayun,ZHANG Yu.Study on Properties of Poly(lactic acid) Toughened by SEBS-g-MAH[J].China Plastics,2011,25(4):38-41. |
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| Authors: | LIU Mimi WEI Fayun ZHANG Yu |
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| Affiliation: | LIU Mimi1,WEI Fayun1,ZHANG Yu1,2(1.College of Material Science and Engineering,Donghua University,Shanghai 201620,China,2.State Key Laboratory for Modification of Chemical Fiber and Polymeric Materials,China) |
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| Abstract: | Poly(lactic acid)(PLA) and SEBS-g-MAH were mixed using a HAAKE rheometer.The mechanical properties,rheological behavior and the microstructure of the obtained blends were investigated.It was shown that the tensile strength of the blends decreased,and the elongation at break increased with increasing SEBS-g-MAH content.When the loading of SEBS-g-MAH was 30 %,the impact strength of the blend was 2.5 times that of neat PLA.The melt viscosity of the blends decreased with increasing SEBS-g-MAH content.SEM showed... |
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| Keywords: | poly(lactic acid) maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer toughening mechanical property rheological behavior |
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