中国塑料 ›› 2010, Vol. 24 ›› Issue (07): 78-82 .DOI: 10.19491/j.issn.1001-9278.2010.07.017

• 助剂 • 上一篇    下一篇

辛二酸/硬脂酸钙双组分成核剂对等规聚丙烯中β晶生成的影响

薛建峰 窦强   

  1. 南京工业大学 南京工业大学
  • 收稿日期:2010-03-25 修回日期:1900-01-01 出版日期:2010-07-26 发布日期:2010-07-26

Effect of Suberic Acid/Calcium Stearate Bi-component Nucleating Agent on β Crystal in Isotactic Polypropylene

XUE Jianfeng DOU Qiang   

  • Received:2010-03-25 Revised:1900-01-01 Online:2010-07-26 Published:2010-07-26
  • Contact: DOU Qiang

摘要: 研究了在120 ℃等温结晶30 min 的条件下,辛二酸/硬脂酸钙双组分成核剂对等规聚丙烯中β晶含量的影响。当加入0.15 %的辛二酸时,等规聚丙烯的β晶消失。固定辛二酸含量为0.15 %、硬脂酸钙含量超过0.525 %时,等规聚丙烯中又开始出现β晶,当硬脂酸钙含量为0.675 %时,β晶含量达到最大值。红外分析表明,辛二酸和硬脂酸钙在双螺杆挤出机中发生原位化学反应,生成高效成核剂辛二酸钙。

关键词: β晶型, 辛二酸, 硬脂酸钙, 成核剂, 聚丙烯

Abstract: Isotactic polypropylene (iPP) containing a binary nucleating agent of suberic acid/calcium stearate (SA/CaSt) was isothermally crystallized at 120 ℃ for 30 min in order to study the influence of the latters on the content of β crystals. It was found that when SA contents was 0.15 % and that of CaSt was more than 0.525 %, β crystals were observed in iPP. When CaSt contents were 0.675 %, β crystals contents showed a maximum. Analysis of FTIR indicated that an in situ chemical reaction occured between SA and CaSt during the melting blending, and a high effective β nucleating agent (calcium suberate) was produced.

Key words: β crystal, suberic acid, calcium stearate, nucleating agent, polypropylene