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首页> 外文期刊>Composite Structures >Flexural properties and morphology of microcellular-insert injection molded all-polypropylene composite foams
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Flexural properties and morphology of microcellular-insert injection molded all-polypropylene composite foams

机译：微孔插入式注塑全聚丙烯复合泡沫的弯曲性能和形貌

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摘要

Single-polymer composite foams or all-polymer composite foams have been developed with further reduced weight, good interfacial adhesion and enhanced recyclability. All-polypropylene (PP) composite foams were prepared by the insert injection molding combined with microcellular injection molding. Flexural properties of the all-PP composite foams were reported and compared with solid PP, all-PP composites and PP foams. In comparison with solid PP, the 4.23% weight reduction, 16.52% increase of flexural strength and 20% increase of flexural modulus were achieved by the all-PP composite foams produced at the injection temperature of 220 degrees C and injection speed of 40 mm/s. Especially, the all-PP composite foams could have lower weight but higher flexural strength than the all-PP composites without foaming. The effect of injection temperature and injection speed on the flexural properties of all-PP composite foams was investigated to explore the optimum processing parameters for balancing good interfacial adhesion and weight reduction. Morphology properties were also investigated. The effect of processing conditions on the cell size and cell density of the all-PP composite foams was analyzed.
机译：已经开发出具有进一步减轻的重量，良好的界面粘合性和增强的可回收性的单聚合物复合泡沫或全聚合物复合泡沫。全聚丙烯（PP）复合泡沫是通过嵌件注射成型与微孔注射成型相结合而制备的。报告了全PP复合泡沫的弯曲性能，并将其与固体PP，全PP复合材料和PP泡沫进行了比较。与固态PP相比，在注射温度为220摄氏度，注射速度为40 mm /的情况下生产的全聚丙烯复合泡沫塑料，重量减轻了4.23％，弯曲强度增加了16.52％，弯曲模量增加了20％。 s。尤其是，与没有发泡的全聚丙烯复合材料相比，全聚丙烯复合泡沫材料的重量更轻，但弯曲强度更高。研究了注射温度和注射速度对全PP复合泡沫材料挠曲性能的影响，以探索最佳工艺参数，以平衡良好的界面粘合性和减轻重量。还研究了形态学性质。分析了加工条件对全PP复合泡沫的泡孔尺寸和泡孔密度的影响。

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