中国塑料 ›› 2009, Vol. 23 ›› Issue (08): 61-65 .DOI: 10.19491/j.issn.1001-9278.2009.08.013

• 加工与应用 • 上一篇    下一篇

复合应力场双向自增强聚丙烯管材的研究

潘治梁;赵国栋;郑伟;蔡绪福;申开智   

  1. 四川大学高分子科学与工程学院 四川大学高分子学院 四川大学高分子科学与工程学院
  • 收稿日期:2009-04-13 修回日期:1900-01-01 出版日期:2009-08-26 发布日期:2009-08-26

Study of Biaxially Self-reinforced Polypropene Pipes under Complex Stress Field

PAN Yi-liang;ZHAO Guo-dong;ZHENG Wei;CAI Xu-fu;SHEN Kai-zhi   

  • Received:2009-04-13 Revised:1900-01-01 Online:2009-08-26 Published:2009-08-26

摘要: 采用自制的剪切拉伸双向复合应力场挤管装置,在常规的生产工艺条件下生产出了双向自增强的聚丙烯(PP)管材。当剪切套转速为10 r/min时,剪切旋转段的温度为190 PP(F401)的周向和轴向拉伸强度较常规管材分别提高了21.4 %和21.1 %。通过电子显微镜多晶X射线衍射仪差示扫描量热仪等手段对PP(F401)管材试样进行微观结构分析,发现其经过复合应力场后管材内部已不再是明显球晶结构,晶体规整性增强,熔融峰升高,结晶度增大。同时管材周轴两向的衍射强度均增强,分子取向有所增强。

关键词: 复合应力场, 双向自增强, 聚丙烯, 微观结构

Abstract:

Polypropene pipe (F401) was extruded using a home-made shearing/draw biaxial complex stress field die. Compared to regularly extruded pipes, the circumferential and axial tensile strengths of F401 were 21.4 % and 21.1 % higher, respectively, when the shear casing rotational speed was 10 r/min and the shear casing temperature was 190 . F401 samples were characterized by SEM, WAXD, and DSC. It was found that the spherulites of F401 pipe was not obvious and arranged more regularly. The melting points drift to higher temperature and the degree of crystallinity increased. XRD showed the orientation in both directions of F401 was higher than regular ones.

Key words: complex stress field, biaxial self-reinforcement, polypropene, microstructure

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