...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer: The International Journal for the Science and Technology of Polymers >The impact of zinc neutralization on the structure and dynamics of precise polyethylene acrylic acid ionomers: A solid-state ~(13)C NMR study
【24h】

The impact of zinc neutralization on the structure and dynamics of precise polyethylene acrylic acid ionomers: A solid-state ~(13)C NMR study

机译：锌中和对精密聚乙烯丙烯酸离聚物的结构和动力学的影响：固态〜（13）C NMR研究

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

Solid-state~(13)C NMR experiments were performed on a series of linear poly(ethylene-co-acrylic acid) (E-AA) copolymers with the carboxylic acid group spaced precisely or randomly along the polyethylene backbone in order to determine the impact that molar percent acid content and acid group spacing have on the structure and dynamics of these materials. The impact of Zn-neutralization is investigated in precise E-AA ionomers. ~(13)C cross-polarization (CP) NMR experiments with ~1H dipolar or ~1H spin-lock filters were utilized to identify the amorphous or crystalline components in the materials. Constraints extracted from the filtering experiments were used to fit quantitative NMR data for samples that contained both crystalline and amorphous regions. All random copolymers contained crystalline phases, while only the precise sample with the longest polyethylene run between acid groups (twenty CH 2 groups) contained a crystalline component. The crystalline phase in this precise copolymer decreased with increasing zinc content.
机译：对一系列线性（聚乙烯-丙烯酸）（E-AA）共聚物进行了固态〜（13）C NMR实验，该共聚物的羧酸基团沿聚乙烯主链精确地或无规地间隔开，以确定摩尔百分比的酸含量和酸基间距对这些材料的结构和动力学的影响。在精确的E-AA离聚物中研究了Zn中和的影响。利用〜1H双极型或〜1H自旋锁定滤光片的〜（13）C交叉极化（CP）NMR实验来鉴定材料中的非晶或晶体成分。从过滤实验中提取的约束条件用于拟合包含结晶区和非晶区的样品的定量NMR数据。所有无规共聚物都包含结晶相，而只有在酸基团（二十个CH 2基团）之间具有最长的聚乙烯的精确样品才包含结晶组分。这种精确共聚物中的结晶相随锌含量的增加而降低。

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