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
研究了马来酸酐在氯化聚丙烯分子链上的接枝对其表面性质的影响,探讨了马来酸酐接枝氯化聚丙烯与聚丙烯及金属的粘接作用及耐水性。结果表明:随着MAH接枝率的增加,水与CPP-g-MAH的接触角逐步减小,CPP-g-MAH的表面能及极性部分增大;CPP-g...研究了马来酸酐在氯化聚丙烯分子链上的接枝对其表面性质的影响,探讨了马来酸酐接枝氯化聚丙烯与聚丙烯及金属的粘接作用及耐水性。结果表明:随着MAH接枝率的增加,水与CPP-g-MAH的接触角逐步减小,CPP-g-MAH的表面能及极性部分增大;CPP-g-MAH对不锈钢、聚丙烯有良好的粘接作用,其粘接性能要明显优于CPP及市售的TS-2聚丙烯胶粘剂,随着接枝率的增加,粘接强度增大;CPP-g-MAH对聚丙烯的粘接作用具有良好的耐水性,经96 h 100℃沸水的浸泡,粘接强度没有发生明显下降。展开更多
采用气-固相搅拌式方法,氯气作为引发剂,在加热的情况下合成了聚氯乙烯(PVC)、丙烯酸丁酯(BA)的氯化原位接枝共聚产物(CPVC-g-BA)。用IR、1H-RNM等分析手段研究了PVC氯化原位接枝BA反应的可行性,以GPC等数据讨论了接枝共聚物的结构,并...采用气-固相搅拌式方法,氯气作为引发剂,在加热的情况下合成了聚氯乙烯(PVC)、丙烯酸丁酯(BA)的氯化原位接枝共聚产物(CPVC-g-BA)。用IR、1H-RNM等分析手段研究了PVC氯化原位接枝BA反应的可行性,以GPC等数据讨论了接枝共聚物的结构,并考察了反应温度、反应时间、单体用量对产物接枝率的影响:当加入20份BA,反应温度为120℃时,反应100 m in,接枝率达1.07%。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）.
文摘研究了马来酸酐在氯化聚丙烯分子链上的接枝对其表面性质的影响,探讨了马来酸酐接枝氯化聚丙烯与聚丙烯及金属的粘接作用及耐水性。结果表明:随着MAH接枝率的增加,水与CPP-g-MAH的接触角逐步减小,CPP-g-MAH的表面能及极性部分增大;CPP-g-MAH对不锈钢、聚丙烯有良好的粘接作用,其粘接性能要明显优于CPP及市售的TS-2聚丙烯胶粘剂,随着接枝率的增加,粘接强度增大;CPP-g-MAH对聚丙烯的粘接作用具有良好的耐水性,经96 h 100℃沸水的浸泡,粘接强度没有发生明显下降。
文摘采用气-固相搅拌式方法,氯气作为引发剂,在加热的情况下合成了聚氯乙烯(PVC)、丙烯酸丁酯(BA)的氯化原位接枝共聚产物(CPVC-g-BA)。用IR、1H-RNM等分析手段研究了PVC氯化原位接枝BA反应的可行性,以GPC等数据讨论了接枝共聚物的结构,并考察了反应温度、反应时间、单体用量对产物接枝率的影响:当加入20份BA,反应温度为120℃时,反应100 m in,接枝率达1.07%。
