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一种新型β成核剂及其对聚丙烯结晶性能的影响
A Novel β Nucleating Agent and Its Effect on the Crystallization Characteristics of Isotactic Polypropylene
【摘要】 研究了一种稀土类新型β成核剂WBG对等规聚丙烯(iPP)结晶性能的影响。WAXD研究发现,WBG加入后可大大提高PP中β晶型的含量,当其加入量超过0 3%时,β晶型的含量可达90%;利用DSC考查了130℃时PP在加入WBG前后的等温结晶过程,发现WBG显著提高了PP的成核速率。从结构上看,WBG不同于目前常见的任何一种β成核剂,是一种高效的新型成核剂。
【Abstract】 A novel rare earth-containing β nucleating agent,WBG,was prepared and its influence on the crystallization characteristics of isotactic polypropylene ( iPP) was investigated.The results showed that the addition of small amounts of WBG to PP induced a rather high proportion of β modification.The relative content of β phase estimated by WAXD was up to 90% in a PP containing more than 03% (mass fraction) of the WBG.The isothermal crystallization at 130 ℃ examined by DSC revealed that theWBG accelerated the overall rate of crystallization remarkably.
【Key words】 rare earth; nucleating agent; isotactic polypropylene; β modification; crystallization;
- 【文献出处】 塑料 ,Plastics , 编辑部邮箱 ,2004年02期
- 【分类号】TQ325.14
- 【被引频次】35
- 【下载频次】438