The Inner Crystal Structures and Mechanical Properties of Entrance Zone and End Zone of Injection Molded Articles in Blend System of Virgin and Pre-Consumer Recycled Resin

作者：Tominaga Aya^*; Sekiguchi Hiroshi; Nakano Ryoko; Yao Shigeru; Takatori Eiichi

来源：Kobunshi Ronbunshu, 2017, 74(3): 225-232.

DOI：10.1295/koron.2017-0006

• Polypropylene
• Injection-Molding
• Mechanical Properties
• Crystal Structure
• Recycle Resin

For the promotion of material recycling, blending virgin and recycled plastic is set to be the most valuable method. However, there are few investigations that study the blending ratio dependence of the inner structure of injection molded articles and the influence on the mechanical properties. Also, there is no investigation of the difference in these properties between the entrance zone (the fastest shear rate region) and end zone (the slowest shear rate region). At this time, we investigated the inner structures and mechanical properties of entrance zone and end zone of injection molded articles of blends of virgin and recycled plastics. As result, we found that blending with recycled plastic changes the inner structure on the mesoscale substantially. We also found that the change indicates that the virgin plastic and recycled plastic do not mix very much. Additionally, the mechanical properties between entrance zone and end zone were very different at the most frequently used blending ratio, virgin:recycle = 30:70.

• 出版日期2017