...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymers for advanced technologies >Effect of nucleating agent supported on zeolite via the impregnation on the crystallization ability of isotactic polypropylene and its mechanism
【24h】

Effect of nucleating agent supported on zeolite via the impregnation on the crystallization ability of isotactic polypropylene and its mechanism

机译：通过浸渍对沸石对沸石的作用对全同立构聚丙烯的结晶能力及其机理

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Addition of an alpha-nucleating agent is the simple and effective method to increase nucleation efficiency of isotactic polypropylene (iPP). However, severe agglomeration and poor dispersibility of sodium 2,2 '-methylene-bis(4,6-di-tertbutylphenyl) phosphate (NA11) decrease the nucleation efficiency in the iPP, and much more nucleating agent is needed to maintain the nucleating property. As a result, it becomes the key how to decrease the size of NA11 and increase the nucleating property. In this paper, zeolite 4A (Z4A) was firstly supported by NA11 through solution impregnation, and NA11 was dispersed by Z4A depending on the dispersion of zeolite as carrier for the second component. Then, the dispersed NA11 system (NA11-Z4A) exhibited a superior nucleation behavior during the crystallization of the iPP matrix when it was used with iPP together. The isothermal and nonisothermal crystallization kinetics indicated that the NA11-Z4A/iPP system had the best crystallization effect. Polarized optical microscopy (POM) and scanning electron microscopy (SEM) analyses showed that the size of NA11 decreased obviously when it was adsorbed on the surface of Z4A, which leads a better dispersibility of the nucleating agent and thus an accelerated nucleation process in the iPP matrix. In the end, the mechanism for the excellent dispersibility of NA11-Z4A, which was based on hydrogen bonding between NA11 and Z4A, was confirmed by Fourier-transform infrared spectroscopy (FTIR). Based on the research work, the solution impregnation strategy can potentially be applied to other systems to inhibit the agglomeration and improve the dispersibility of additives in iPP.
机译：添加α-成核剂是提高全同立构聚丙烯（IPP）成核效率的简单有效的方法。然而，2,2,2'-亚甲基-BIS（4,6-二叔丁基苯基）磷酸盐（Na11）的严重聚集和差的分散性降低了IPP中的成核效率，并且需要更多的成核剂来维持成核性质。结果，它成为如何降低NA11大小并增加成核特性的关键。本文首先通过溶液浸渍首先由Na11支持沸石4a（Z4a），并且根据沸石作为第二组分的载体的分散，通过Z4a分散Na11。然后，当将IPP与IPP一起使用时，分散的NA11系统（NA11-Z4A）在IPP基质结晶过程中表现出优异的成核行为。等温和非等温结晶动力学表明NA11-Z4A / IPP系统具有最佳的结晶作用。偏振光显微镜（POM）和扫描电子显微镜（SEM）分析表明，当它吸附在Z4a的表面上时，Na11的尺寸明显降低，这导致成核剂的更好分散性，从而在IPP中进行加速成核过程矩阵。最后，通过傅里叶变换红外光谱（FTIR）确认基于NA11和Z4a之间的氢键合的Na11-Z4a的优异分散性的机制。基于研究工作，溶液浸渍策略可能适用于其他系统，以抑制附聚并改善IPP中添加剂的分散性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号