NR/HNBR/ENR混合物的界面固化动力学和兼容性行为:形态学,粘性弹性和网络结构
Yihao Fan1, Qingyun Zhao1, Mengyan Li1
1College of Materials Science and Engineering, Hainan University, Haikou, Hainan 570228, PR China.
ACS omega
|February 16, 2026
概括
环氧化天然 (ENR) 提高了天然/化丁烯 (NR/HNBR) 混合物的兼容性和改进形态. 此外,ENR还影响治愈性迁移,优化火山化动力学,以提高弹性质的性能.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 技术 技术 技术
背景情况:
- 开发具有低温灵活性,耐油性和动态耐久性的高性能弹性体具有挑战性.
- 天然 (NR) 和化烯 (HNBR) 是不可混合的,限制了混合性能.
- 界面兼容性对于优化NR/HNBR混合物特性至关重要.
研究的目的:
- 调查NR/HNBR混合物中的界面兼容性和火山化动力学,使用环氧化天然 (ENR) 作为兼容剂.
- 了解ENR在提炼相位形态和改善界面粘附中的作用.
- 分析ENR对治愈性迁移和火山化动态的影响.
主要方法:
- 原子力显微镜 (AFM) 用于形态分析.
- 动态机械分析 (DMA) 用于评估粘弹性特性.
- 修身学和动力学分析以研究火山化行为.
主要成果:
- 添加ENR完善了相位形态,并提高了NR/HNBR混合物的界面兼容性.
- 将8 phr ENR纳入NR/HNBR (80/20) 将界面粗度 (Rq) 从379nm降低到282nm,并将ΔTg从~49°C降低到~42°C.
- 火山化动力学受到跨相界的治愈性迁移的显著影响,ENR调节了这种效应并减少了动力异质性.
结论:
- ENR有效地使NR/HNBR混合物兼容,改善相位形态和接口特性.
- 跨相界的治愈性迁移极大地影响NR/HNBR混合物的火山化动力学.
- ENR影响治愈分区并减弱动力异质性,从而导致更受控制和潜在的改善的火山化.
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