应用化学 ›› 1990, Vol. 0 ›› Issue (3): 33-38.

• 研究论文 • 上一篇    下一篇

热处理对HDPE/iPP共混物中附生结晶的影响

申宇, 杨德才, 冯之榴   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1989-06-22 修回日期:1989-09-15 出版日期:1990-06-10 发布日期:1990-06-10

THE INFLUENCE OF THERMAL TREATMENT ON EPITAXIAL CRYSTALLIZATION IN HDPE/iPP BLENDS

Shen Yu, Yang Decai, Feng Zhiliu   

  1. Changchum Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-06-22 Revised:1989-09-15 Published:1990-06-10 Online:1990-06-10

摘要: 木工作用透射电子显微术研究不同热处理温度对HDPE/iPP共混物溶液浇铸薄膜中附生结晶的影响。经热处理的共混物薄膜HDPE片晶尺寸明显增加,但其长轴仍与iPP成约50°夹角。电子衍射和暗场的实验结果及样品倾斜技术的利用证明了在iPP的两种结构区域中HDPE均在iPP上异相附生生长,两者的接触面为iPP的(010)和HDPE的(100)。在194℃热处理20min,然后自然冷却的HDPE/iPP共混物薄膜中的HDPE仍然在iPP上附生生长。

关键词: 聚丙烯, 聚乙烯, 共混物, 附生结晶, 形态结构

Abstract: A study of the effect of thermal treatment on epitaxial crystallization in HDPE/iPPblends was carried out by means of TEM and specimen tilt technique of electron microscopy. When the solution-cast films of HDPE/iPP blends were heated to above the meltingpoint of HDPE(145℃)for about 30 min., and subsequently cooled to room temperature, thesize of the recrystallized lamellae of HDPE increased in both regions of the cross-hatchedand single-crystal-type structure of iPP. However, the epitaxial and structural relationshipsbetween HDPE and iPP remained unchanged. Under the heat treatment of higher temperature(194℃,20 min.), the morphologies and structures of recrystallized HDPE and iPP in theblend were similar to that of the blend heat-treated at lower temperature(145℃).

Key words: polypropylene, polyethylene, blend, epitaxial crystallization, morphological structure