The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer （SEBS-g-MAH） and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends com...The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer （SEBS-g-MAH） and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends composites was investigated. Recycled plastic polypro-pylene （PP）, high-density polyethylene （HDPE） and polystyrene （PS）, were mixed with wood flour in a high speed blender and then extruded by a twin/single screw tandem extruder system to form wood flour/recycled plastic blends composites. Results show that the impact properties of the composites were improved more significantly by using SEBS-g-MAH compatibilizer than by using the mixtures of MAH and DCP via reactive blending in situ. However, contrary results were ob-served on the tensile and flexural properties of the corresponding com-posites. In General, the mechanical properties of composites made from recycled plastic blends were inferior to those made from virgin plastic blends, especially in elongation break. The morphological study verified that the interfacial adhesion or the compatibility of plastic blends with wood flour was improved by adding SEBS-g-MAH or in-situ grafting MAH. A better interfacial bonding between PP, HDPE, PS and wood flour was obtained by in-situ grafting MAH than the addition of SEBS-g-MAH. In-situ grafting MAH can be considered as a potential way of increasing the interfacial compatibility between plastic blends and wood flour. The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis （DMA）.展开更多
巴斯夫日前推出一款用于生产农用地膜的新型塑料Ecovio F Mulch，扩大了可生物降解塑料混合物的产品线。相对于采用普通聚乙烯（PE）塑料制成的农用薄膜，采用Ecovio F Mulch制成的薄膜可以生物降解。农民无需在收获作物后对其进行清理...巴斯夫日前推出一款用于生产农用地膜的新型塑料Ecovio F Mulch，扩大了可生物降解塑料混合物的产品线。相对于采用普通聚乙烯（PE）塑料制成的农用薄膜，采用Ecovio F Mulch制成的薄膜可以生物降解。农民无需在收获作物后对其进行清理或回收，只需将其与作物残渣一起埋入土中即可，从而大幅节约时间和成本。这种薄膜的生产具有经济性，因其能够以更小的厚度达到与普通PE薄膜相同的性能。此外，对薄膜生产商而言，Ecovio F Mulch是一种十分方便的解决方案，因为这种树脂可使用普通PE挤塑设备进行加工，加工商可快速调整设备，无需进行大规模改动。这种材料现已在全球上市。展开更多
基金supported by the National High Technology Research and Development Program of China(2010AA101703)the Natural Science Foundation of Heilongjiang Province of China (C200950)the Fundamental Research Fundsfor the Central Universities (DL09BB38)
文摘The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer （SEBS-g-MAH） and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends composites was investigated. Recycled plastic polypro-pylene （PP）, high-density polyethylene （HDPE） and polystyrene （PS）, were mixed with wood flour in a high speed blender and then extruded by a twin/single screw tandem extruder system to form wood flour/recycled plastic blends composites. Results show that the impact properties of the composites were improved more significantly by using SEBS-g-MAH compatibilizer than by using the mixtures of MAH and DCP via reactive blending in situ. However, contrary results were ob-served on the tensile and flexural properties of the corresponding com-posites. In General, the mechanical properties of composites made from recycled plastic blends were inferior to those made from virgin plastic blends, especially in elongation break. The morphological study verified that the interfacial adhesion or the compatibility of plastic blends with wood flour was improved by adding SEBS-g-MAH or in-situ grafting MAH. A better interfacial bonding between PP, HDPE, PS and wood flour was obtained by in-situ grafting MAH than the addition of SEBS-g-MAH. In-situ grafting MAH can be considered as a potential way of increasing the interfacial compatibility between plastic blends and wood flour. The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis （DMA）.
文摘巴斯夫日前推出一款用于生产农用地膜的新型塑料Ecovio F Mulch，扩大了可生物降解塑料混合物的产品线。相对于采用普通聚乙烯（PE）塑料制成的农用薄膜，采用Ecovio F Mulch制成的薄膜可以生物降解。农民无需在收获作物后对其进行清理或回收，只需将其与作物残渣一起埋入土中即可，从而大幅节约时间和成本。这种薄膜的生产具有经济性，因其能够以更小的厚度达到与普通PE薄膜相同的性能。此外，对薄膜生产商而言，Ecovio F Mulch是一种十分方便的解决方案，因为这种树脂可使用普通PE挤塑设备进行加工，加工商可快速调整设备，无需进行大规模改动。这种材料现已在全球上市。
