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首页> 外文期刊>Journal of Applied Polymer Science >Creep Resistance of Wood-filled Polystyene/High-Density Polyethylene Blends
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Creep Resistance of Wood-filled Polystyene/High-Density Polyethylene Blends

机译：木材填充的聚苯乙烯/高密度聚乙烯混合物的耐蠕变性

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摘要

Creep, the deformation ()ver time of a material under stress, is one char- acteristic of wood-filled polymer composites that has resulted in poor performance in certain applications. This project was undertaken to investigate the advantages of blending a plastic of lower-creep polystyrene (PS) with high-density polyethylene (HDPE) at ratios of 100:0,' 75:25, 50:50, 25:75, and 0:100. These various PS-HDPE blends were then melt blended with a short fiber-Iength wood flour (WF). Extruded bars of each blend were examined to measure modulus of elasticity and ultimate stress. Increasing the ratio of WF increased modulus of elasticity in all composites, except between 30 and 40% WF, whereas the effect of WF on ultimate stress was variable, depending on the composite. Scanning electron microscopic images and thermal anal. ysis indicated that the wood particles interacted with the PS phase, although the interactions were weak. Finally, creep speed was calculated by using a three-point 1 b~nding ~eo~etry ~ith a load of 50% of the .ult~mate stre~s. .Creep ~ecreased only I slIghtly wIth IncreasIng WF content but more slgnlficantly wIth IncreasIng PS content' lexcept at pure PS. The WF/75PS-25HDPE blend showed the least creep.
机译：蠕变是材料在应力作用下随时间的变形，是木材填充的聚合物复合材料的一个特征，在某些应用中导致较差的性能。该项目旨在研究将低蠕变聚苯乙烯（PS）塑料与高密度聚乙烯（HDPE）以100：0、75：25、50：50、25：75和0的比例混合的优势：100。然后将这些各种PS-HDPE共混物与短纤维强度木粉（WF）熔融共混。检查每种共混物的挤压棒，以测量弹性模量和极限应力。增加WF的比例会增加所有复合材料的弹性模量，但WF介于30％和40％之间，而WF对最终应力的影响是可变的，具体取决于复合材料。扫描电子显微镜图像和热肛门。尤西斯指出，尽管相互作用较弱，但木材颗粒与PS相相互作用。最后，蠕变速度通过使用三点1载荷法计算，载荷为最终载荷的50％。蠕变仅增加了WF含量，但增加了，但纯PS却增加了。 WF / 75PS-25HDPE混合物的蠕变最小。

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