高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (1): 154.

• 研究快报 • 上一篇    下一篇

硬脂酸镧复合物对聚丙烯β晶型的诱导作用

冯嘉春1,2, 陈鸣才2, 黄志镗1   

  1. 1. 中国科学院化学研究所, 北京 100080;
    2. 中国科学院广州化学研究所, 广州 510650
  • 收稿日期:2000-07-31 出版日期:2001-01-24 发布日期:2001-01-24
  • 通讯作者: 陈鸣才(1954年出生),男,研究员,博士生导师,主要从事高分子改性及超临界流体研究.

Lanthanum Stearate Composite Act as β-Modification Nucleating Agent of Isotatic Polypropylene

FENG Jia-Chun1,2, CHEN Ming-Cai2, HUANG Zhi-Tang1   

  1. 1. Institute of Chemistry, Academia Sinica, Beijing 100080, China;
    2. Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou 510650, China
  • Received:2000-07-31 Online:2001-01-24 Published:2001-01-24

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关键词: 硬脂酸镧, 等规聚丙烯, &beta, 晶型

Abstract: Acomposite of 60% of lanthanum stearate and 40%(mass fraction) of stearic acid was prepared and its influence on the crystallization characteristics of isotatic polypropylene (iPP) was investigated. The results showed that we had found a new kind of β-crystalline form nucleating agent. The composite might induced rather high proportion of β-modification. The relative content of β-phase estimated by WAXDand DSCwas 30% and 51.8% in a PPcontaining 2.5%(mass fraction) of the composite respectively. The isothermal crystallization at 130 ℃ and melting behavior examined by DSCrevealed that the composite accelerated the overall rate of crystallization remarkably. The half crystallization period t 1/2 decreased from 118 min of pure PPto 75 min of PPcontaining 2.5% of the composite. However, the composite had no obvious influence on crystallization mode and the size of α-crystal unit cell.

Key words: Lanthanum stearate compound, Isotatic polypropylene, β-Modification

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