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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical properties of biodegradable polylactide/poly(ether-block-amide)/thermoplastic starch blends: Effect of the crosslinking of starch
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Mechanical properties of biodegradable polylactide/poly(ether-block-amide)/thermoplastic starch blends: Effect of the crosslinking of starch

机译：可生物降解的聚丙交酯/聚（醚嵌段酰胺）/热塑性淀粉共混物的机械性能：淀粉交联的影响

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摘要

Corn starch was crosslinked with epichlorohydrin (ECH) and then plasticized with glycerol. Subsequently, this thermoplasticized crosslinked starch (TPCLS) was melt-compounded with polylactide (PLA) and poly(ether-block-amide) (PEBA) to prepare biodegradable PLA/PEBA/TPCLS blend with high impact resistance. It was found that the crosslinking agent ECH had critical effect on the impact strength, tensile properties, and internal morphology of the ternary blend. The impact strength, tensile strength, and elongation at break increased with ECH content; thereafter, they decreased on further increasing the ECH content. At 0.5 wt % ECH content, impact strength, tensile strength, and elongation at break reached the maximum values and smaller salami structure particles were observed accordingly. These results were attributed to the competition of shear resistance of TPCLS and the chemical linkage between the crosslinked starch and PLA-g-MA. (C) 2015 Wiley Periodicals, Inc.
机译：玉米淀粉与表氯醇（ECH）交联，然后与甘油增塑。随后，将该热塑性交联淀粉（TPCLS）与聚丙交酯（PLA）和聚（醚嵌段酰胺）（PEBA）熔融混合，以制备具有高抗冲击性的可生物降解的PLA / PEBA / TPCLS共混物。已经发现，交联剂ECH对三元共混物的冲击强度，拉伸性能和内部形态具有关键作用。冲击强度，拉伸强度和断裂伸长率随ECH含量的增加而增加;此后，随着进一步增加ECH含量，它们减少了。在0.5重量％的ECH含量下，冲击强度，拉伸强度和断裂伸长率达到最大值，因此观察到较小的萨拉米结构颗粒。这些结果归因于TPCLS的抗剪切性竞争以及交联淀粉与PLA-g-MA之间的化学键。 （C）2015威利期刊公司

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