• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Effect of SiO2 nanoparticles on the reaction-induced phase separation in dynamically asymmetric epoxy/PEI blends
【24h】

Effect of SiO2 nanoparticles on the reaction-induced phase separation in dynamically asymmetric epoxy/PEI blends

机译：SiO2纳米颗粒对动态不对称环氧/ PEI共混物中反应诱导的相分离的影响

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

Hydrophilic silica nanoparticles were introduced into the epoxy/polyetherimide (epoxy/PEI) binary system to study their effect on the reaction induced phase separation (RIPS) by differential scanning calorimetry (DSC), optical microscopy (OM), and time-resolved light scattering (TRLS). Depending on the specific interaction between the silica surface and the epoxy, the silica nanoparticles selectively distribute in the epoxy-rich domain, leading to a slow down of the diffusion of the epoxy molecules. And the coarsening mechanism was forced towards the diffusion-controlled regime, which enhanced the viscoelastic effect and produced a more dynamic asymmetric epoxy/PEI system. Based on this, the final morphology was stopped at an earlier stage of an inverted phase structure (isolated epoxy-rich droplet and PEI-rich matrix). The silica nanoparticles showed a critical impact on the balance of the diffusion and geometrical growth of epoxy molecules. Further, the activity energy of the curing reaction and the phase separation temperatures were decreased by existence of the silica nanoparticles.
机译：将亲水性二氧化硅纳米粒子引入环氧/聚醚酰亚胺（epoxy / PEI）二元体系，以通过差示扫描量热法（DSC），光学显微镜（OM）和时间分辨光散射研究其对反应诱导相分离（RIPS）的影响（TRLS）。取决于二氧化硅表面和环氧树脂之间的特定相互作用，二氧化硅纳米粒子选择性地分布在富含环氧的区域中，从而导致环氧树脂分子的扩散减慢。并且将粗化机制推向扩散控制机制，这增强了粘弹性效应并产生了更动态的不对称环氧/ PEI体系。基于此，最终形态在反相结构的早期停止（分离的富含环氧的液滴和富含PEI的基质）。二氧化硅纳米颗粒对环氧分子的扩散和几何增长的平衡显示出至关重要的影响。此外，由于二氧化硅纳米粒子的存在，降低了固化反应的活性能和相分离温度。

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